masterpact str units

Instruction Bulletin48049-071-03

01/2002Cedar Rapids, IA, USA

MASTERPACT MP, MF and MC Circuit Breakers

Retain for future use.

MASTERPACT MP, MF and MC Circuit Breakers 48049-071-03Instruction Bulletin 01/2002

19982002 Schneider Electric All Rights Reserved.2

NOTICE Read these instructions carefully and look at the equipment to become familiar with the device before trying to install, operate, service or maintain it. The following special messages may appear throughout this bulletin or on the equipment to warn of potential hazards or to call attention to information that clarifies or simplifies a procedure.This is the safety alert symbol. It is used to alert you to potential personal injury hazards. Obey all safety messages that follow this symbol to avoid possible injury or death.

Provides additional information to clarify or simplify a procedure.

PLEASE NOTE Electrical equipment should be serviced only by qualified personnel. No responsibility is assumed by Schneider Electric for any consequences arising out of the use of this material. This document is not intended as an instruction manual for untrained persons.

FCC NOTICE This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense.

DANGERDANGER indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.

WARNINGWARNING indicates a potentially hazardous situation which, if not avoided, can result in death or serious injury.

CAUTIONCAUTION indicates a potentially hazardous situation which, if not avoided, can result in minor or moderate injury.

CAUTIONCAUTION, used without the safety alert symbol, indicates a potentially hazardous situation which, if not avoided, can result in property damage.

48049-071-03 MASTERPACT MP, MF and MC Circuit Breakers01/2002 Table of Contents

19982002 Schneider Electric All Rights Reserved 3

TABLE OF CONTENTSSECTION 1: INSTALLATION Recommendations for Storing ..................................................................... 5

Temperature Limits ................................................................................ 5Circuit Breaker Status ............................................................................ 5Covering ................................................................................................. 5Maximum Stacking ................................................................................. 5

Identifying the Circuit Breaker ...................................................................... 6Unpacking .................................................................................................... 7

MP40 to MP63 Drawout-mounted Circuit Breakers ............................... 8Handling ....................................................................................................... 9

MP08 to MP30 and MC08 to MC20 Circuit Breakers ............................. 9MC32 Circuit Breakers ......................................................................... 10MP40 to MP63 and MC40 to MC50 Circuit Breakers ........................... 11MF12, MF20 and MF30 Circuit Breakers ............................................. 12

Attaching Rear Terminals .......................................................................... 13Mounting .................................................................................................... 14

Cable Connection ................................................................................. 14Bus Bar Connection ............................................................................. 15

Control Wiring ............................................................................................ 16Fixed-mounted Circuit Breakers ........................................................... 16Drawout-mounted Circuit Breakers ...................................................... 17

SECTION 2: OPERATION Disconnecting and Connecting Instructions ............................................... 19Disconnecting Instructions ................................................................... 20Installing the Circuit Breaker in the Stationary Assembly ..................... 21Connecting Instructions ........................................................................ 22

Operating ................................................................................................... 23Charging Instructions ........................................................................... 23Closing Instructions .............................................................................. 23Opening Instructions ............................................................................ 24Resetting Instructions ........................................................................... 24

Locking ...................................................................................................... 24Locking by Key Interlock ...................................................................... 24Locking by Padlock .............................................................................. 25Locking by Door Interlock ..................................................................... 25Spring Interlock .................................................................................... 26

SECTION 3: CONTROL UNIT TYPES STR 18 M Control Unit ............................................................................... 28STR 28 D Control Unit ............................................................................... 30STR 38 S Control Unit ............................................................................... 32STR 58 U Control Unit ............................................................................... 34Control Unit Options .................................................................................. 36

Pre-trip and Overload Indication Option ............................................... 36Thermal Memory Limitation .................................................................. 37Ammeter Option ................................................................................... 38Fault Indication Option ......................................................................... 39Battery Option ...................................................................................... 40Load Monitoring Option ........................................................................ 40Segregated Alarm Switch Option ......................................................... 41Ground-fault Protection Option ............................................................ 41Zone-selective Interlocking Option ....................................................... 42Transmit Data from Trip Unit Option .................................................... 42

Document Subtitle (In header) 48049-071-03Table of Contents 01/2002

19982002 Schneider Electric All Rights Reserved4

SECTION 4: MAINTENANCE Routing Inspections .................................................................................... 44Electrical Maintenance ............................................................................... 44Check Arc Chutes ...................................................................................... 45

Check Contacts .................................................................................... 45Wiring Diagram .......................................................................................... 46

SECTION 5: SET-UP GUIDE Minimum Enclosure .................................................................................... 48Clearance Information ................................................................................ 49Stacking Configurations .............................................................................50Cumulative Loading ................................................................................... 51Temperature Derating ................................................................................ 52Power Dissipation ...................................................................................... 53Resistance ................................................................................................. 53Altitude Correction Factors ......................................................................... 53

48049-071-03 MASTERPACT MP, MF and MC Circuit Breakers01/2002 Section 1Installation


SECTION 1 INSTALLATION

Hex-head wrenches Straight-blade screwdrivers (large and small) Wire stripper

RECOMMENDATIONS FOR STORING

Do not store circuit breakers in a corrosive or salt-air environment.

Temperature Limits Store from -60 F (-50 C) min. to +160 F (+70 C) max.

Circuit Breaker Status Store with: Main contacts open Spring discharged Connected position

Covering Store the circuit breaker only in the original shipping carton or other protective weatherproof covering.

Maximum Stacking

DANGERHAZARD OF ELECTRIC SHOCK, BURN, OR EXPLOSION This equipment must be installed and

serviced only by qualified electrical personnel.

Turn off all power supplying this equipment before working on or inside equipment.

Always use a properly rated voltage sensing device to confirm power is off.

Replace all devices, doors and covers before turning on power to this equipment.

Failure to follow this instruction will result in death or serious injury.

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3219

0631

3220 MP08 to MP30

3

MP40 to MP63 2

MASTERPACT MP, MF and MC Circuit Breakers 48049-071-03Section 1Installation 01/2002


IDENTIFYING THE CIRCUIT BREAKER

Figure 1: Location of Markings on Circuit Breaker

Figure 2: Location of Markings on Stationary Assembly

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3221

Serial:Control diagram no.:Sensor. . .In:Instantaneous override:

Electrical accessories identification label (fixed mounting)

Name label giving rating, interrupting ratings and rated voltage

Manufacturing no.Wiring diagram no.Sensor ratingInstantaneous pickup

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3222

Circuit breaker stationary assemblyA max. Accepts frame size: MP/MC

Wiring diagram no.

Serial

Frame sizeType

Standard or specific diagram no.

Manufacturing no.



UNPACKING

MP08 to MP30 and MC08 to MC32 Fixed-mounted Circuit BreakersThe circuit breaker stationary assembly is secured to its shipping pallet with four bolts, nuts and washers. However, on the drawout mounting, withdrawal of the circuit breaker is required to access the hardware.Disconnect and remove the circuit breaker from the stationary assembly (refer to Disconnection Instructions, page 20).

Drawout-mounted Circuit Breaker with Stationary Assembly

Figure 3: Unpacking Drawout-mounted Circuit Breaker

Drawout-mounted Circuit Breaker without Stationary AssemblyCircuit breaker is delivered upside down. Place another pallet next to shipping pallet. Rotate circuit breaker onto terminals, then onto its bottom on other pallet.

Figure 4: Unpacking Drawout-mounted Circuit Breaker Delivered without Stationary Assembly

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Connected

Disconnected

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3225

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3226

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3224

Remove four bolts, nuts and washers.


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3227

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3228

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3231

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3232




Stationary Assembly OnlyIf present, remove strapping tape holding the clusters.

Figure 5: Unpacking Stationary Assembly

MP40 to MP63 Drawout-mounted Circuit Breakers

1. Remove four bolts, nuts and washers.2. Position another pallet and rotate circuit

breaker.3. Remove plastic shipping caps.

Figure 6: Unpacking Stationary Assembly

Remove four bolts, nuts and washers.06

3132

29

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3230

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3233

1

2 1 2



HANDLING

MP08 to MP30 and MC08 to MC20 Circuit Breakers

Both the circuit breaker frame and stationary assembly have notched lifting flanges for lifting. To reduce the total weight and ease installation of the stationary assembly, remove the circuit breaker from the stationary assembly (refer to Disconnecting Instructions, page 20). To lift the circuit breaker using a lifting device, use an overhead lifting device attached to the lifting flanges.

DANGERHAZARD OF CIRCUIT BREAKER FALLING Be sure equipment has adequate lifting

capacity for the unit being lifted. Follow manufacturers instructions for use of

lifting equipment. Wear hard hat, safety shoes and heavy

gloves.


Table 1: 3-pole Circuit Breaker Weights

Circuit Breaker Type

Stationary Assemblylbs. (kg)

Circuit Breakerlbs. (kg)

Terminals

lbs. (kg)MP08 51 (23) 102 (46) 13 (6)*MP12 51 (23) 102 (46) 13 (6)*MP16 51 (23) 102 (46) 13 (6)MP20 60 (27) 121 (55) 36 (16)MP25 110 (50) 176 (80) 89 (40)MP30 110 (50) 176 (80) 89 (40)MC08 51 (23) 102 (46) 13 (6*)MC16 51 (23) 102 (46) 13 (6)MC20 60 (27) 121 (55) 36 (16)*Optional terminals.

Figure 7: Using the Lifting Flanges

Figure 8: Using a Lifting Sling

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Circuit Breaker Stationary assembly

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3235

Cable slings 0.40 in. (10 mm) dia. max.

Circuit Breaker Stationary assembly

CAUTIONHAZARD OF EQUIPMENT DAMAGEDo not let the forks of a fork lift protude past the rear of the circuit breaker.Failure to follow this instruction can result in equipment damage.

Figure 9: Using an Electrical or Mechanical Platform Lift

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Circuit Breaker



MC32 Circuit BreakersThe circuit breaker and its stationary assembly have lifting flanges for lifting. Before handling the circuit breaker, remove it from the stationary assembly. To lift the circuit breaker as shown, use an overhead lifting device attached to the notched lifting flanges.




gloves.


Figure 10: Using a Lifting Sling for Circuit Breaker

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3237

Compensation bar not supplied; hooks supplied upon request.


Type StationaryAssembly

Circuit Breaker

Terminals

lbs. (kg) lbs. (kg) lbs. (kg)MC32 132 (60) 198 (90) 88 (40)

Figure 11: Using a Lifting Sling for Stationary Assembly

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Cable slings: 0.40 in.[10 mm] dia. max.

Rod dia.: 0.48 in. [12 mm]

CAUTIONHAZARD OF EQUIPMENT DAMAGEClearance inside the switchboard is minimal. To avoid damage to the load terminals, be sure they clear the lower edge of the switchboard enclosure before attempting installation.Failure to follow this instruction can result in equipment damage.


Assembly

3.92 in. (100 mm) max.

H = 22 in.(559 mm)



MP40 to MP63 and MC40 to MC50 Circuit Breakers

To lift the circuit breaker as shown below, use an overhead lifting device attached to the notched lifting flanges. Compensation bars not supplied, hooks can be supplied upon request.




gloves.


Figure 13: Using a Lifting Sling for Circuit Breaker

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3240

Cable slings: 0.40 in. [10 mm] dia. max. 30 in. [800 mm] min.


Type StationaryAssembly

Circuit Breaker

Terminals

lbs (kg) lbs (kg) lbs (kg)MP40 198 (90) 264 (120) 88 (40)MP50 198 (90) 264 (120) 177 (80)MP63 242 (110) 308 (140) 177 (80)MC40 198 (90) 264 (120) 88 (40)MC50 198 (90) 264 (120) 177 (80)

Figure 14: Using a Lifting Sling for Stationary Assembly06

3132

41

Cable slings: 0.40 in. [10 mm] dia. max. 30 in. [800 mm] min.

CAUTIONHAZARD OF EQUIPMENT DAMAGE Do not let the forks of a fork lift protude past

the rear of the circuit breaker. Place a chock as shown. Remove it as soon

as the forks lean on the switchboard floor.Failure to follow this instruction can result in equipment damage.


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3239

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3239

Frame Stationary assembly



MF12, MF20 and MF30 Circuit BreakersTo lift the circuit breaker as shown, use an overhead lifting device attached to the notched lifting flanges. Compensation bar not supplied, hooks supplied upon request.




gloves.


Figure 16: Using a Lifting Sling (MF12 and MF20 Circuit Breakers)

1

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1

Cable slings: 0.40 in. [10 mm] dia. max.

CAUTIONHAZARD OF EQUIPMENT DAMAGEClearance inside the switchboard is minimal. To avoid damage to the load terminals, be sure they clear the lower edge of the switchboard enclosure before attempting installation.Failure to follow this instruction can result in equipment damage.

Figure 17: Using a Lifting Sling (MF30 Circuit Breaker)

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Cable slings: 0.40 in. [10 mm] dia. max.


Typelbs. (kg)

Circuit Breaker lbs. (kg)

Terminalslbs. (kg)

MF12 121 (55) 58 (26)MF20 176 (80) 76 (34)MF30 264 (120) 187 (85)

Figure 18: Using an Electrical or Mechanical Platform Lift (Fixed-mounted MF12, MF20 and MF30 Circuit Breaker)

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Use a sling to support the circuit breaker.

H = 21 in.[533 mm]H = 25 in.[635 mm]

MF12 Circuit Breaker

MF20 and MF30 Circuit Breakers



ATTACHING REAR TERMINALSTable 5: Circuit Breaker Types and Attachment

Drawout Circuit Breakers Fixed Circuit Breakers Attaching Rear Terminals*MP08, MP12, MP16 and MC08 to MC16

MP08, MP12, MP16

MP20 and MC20 MP20

MP25 to MP32 MP25 to MP32

MP40 and MC40

MP50, MP63 and MC50 MP50, MP63 and MC50

*Rear terminal must be installed on fixed-mounted and drawout-mounted circuit breakers rated 1600 A and above. The terminals provided with the circuit breaker must be mounted as indicated.

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Screws: M10, 2-2/5 in. [60 mm] long.Tightening torque = 375 lb-in (42 Nm).Use 11/16 in. hex-head wrench.

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3249

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3249

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3250

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3250

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3250

Screws: M10, 2-2/5 in. [60 mm] long.Use 11/16 in. hex-head wrench.Tightening torque = 375 lb-in. (42 Nm).

Fixed-mounted

Drawout-mounted

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or

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or

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3255

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3255



MOUNTINGDistribute weight of the equipment uniformly over a rigid mounting surface (such as crossbeams or a metal floor).The mounting plate should be perfectly flat. This eliminates any risk of deformation which could interfere with correct operation of the circuit breaker.

Cable ConnectionIt is essential that mechanical stresses are not applied to the circuit breaker terminal pads if a cable connection is used. Vertical terminal pads are recommended, and should be installed as indicated below.

With bus bar extensions: if the circuit has only a single cable, use method (A). if the circuit has several cables, use method similar to (B).

In all cases, the same general rules apply for cables that apply for bus bars: position cable ends correctly before the bolts are inserted, and attach cables securely to framework (C).

\

CAUTIONHAZARD OF EQUIPMENT DAMAGEDistribute weight over a rigid mounting surface.Failure to follow this instruction can result in equipment damage. Figure 19: Weight Distribution on Mounting Plate

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DANGERHAZARD OF ELECTRIC SHOCK, BURN OR EXPLOSION This equipment must be installed and






CAUTIONHAZARD OF EQUIPMENT DAMAGECarefully follow all instructions for making electrical connections and supporting and clamping bus bars.Failure to follow this instruction can result in equipment damage.

Figure 20: Cable Connections

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A

C

B



Bus Bar ConnectionBus bar dimensions shown in Table 6, Bus Bars have been extrapolated from test data based on UL 891. They should be used only as a guide and not replace industrial experience or a temperature rise test.

Correct clamping of bus bars depends on, among other things, the torque used to tighten the nuts and bolts. Excessive torque may cause the same problems as insufficient torque.

The bus bars should be adjusted to ensure that the mounting holes (A, see Figure 21, page 15) are aligned with the terminal pads before the bolts are inserted. The bus bar is held by support (B) which is attached to the framework of the switchboard, so that the terminal pads do not have to support the weight of the bus bar. Dimension (C) must be maintained (Table 7, next page) to withstand the electrodynamic stresses between phases in the event of a short circuit.







Table 6: Bus Bars

Circuit Breaker Copper Bus Bars

Quantity Dimension in. (mm)MP08, MC08 1 0.25 x 3.00 (6 x 76)MP12 2 0.25 x 3.00 (6 x 76)MP16, MC16 2 0.25 x 3.00 (6 x 76)MP20, MC20 2 0.25 x 4.00 (6 x 102)MP25 2 or 4 0.25 x 5.00 (6 x 127)

0.25 x 2.50 (6 x 64)MP30 4 or 3 0.25 x 4.00 (6 x 102)

0.25 x 6.00 (6 x 152)MC32 3 0.25 x 6.00 (6 x 152)MP40, MC40 4 or 5 0.25 x 5.00 (6 x 127)

0.25 x 4.00 (6 x 102)MP50, MC50 6 or 5 0.25 x 5.00 (6 x 127)

0.25 x 6.00 (6 x 152)MP63 6 0.25 x 6.00 (6 x 152)

Table 7: Tightening Torque

Tightening Torque

Bolt Size Hole Diameter Grooved or Flat Washer Belleville Washer0.38 in. (10mm) 0.44 in. (11mm) 28 lb-ft (38 Nm) 31 lb-ft (43 Nm)

CAUTIONHAZARD OF EQUIPMENT DAMAGECarefully follow all instructions for making electrical connections and supporting end clamping bus bars.Failure to follow this instruction can result in equipment damage.

Figure 21: Bus Bar Connection

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*Dimension C is the maximum distance between circuit breaker horizontal terminals (connection point of the extensions) and the first support or spacer, based on the expected short-circuit current (see Table 8, page 16).

A B

C*



CONTROL WIRING

Connect each terminal using one stranded #18 to #14 AWG (0.6 to 2.5 mm2) copper wire. Cable strip length: 3/8 in. (9mm).

Fixed-mounted Circuit Breakers 1. Install conductor.

2. Remove transparent shield.

Table 8: Bus Bar Connection

Expected Short-circuit Current (kA rms)30 50 65 80 100 150

MP08 to MP16 and MC08 to MC16 Circuit BreakersDimension C in.

(mm)13.75(350)

11.88(300)

9.88(250)

7.89(200)

6.00(150)

6.00(150)

MP20 to MP63 and MC20 to MC50 Circuit BreakersDimension C in.

(mm)13.75(350)

11.89(300)

9.88(250)

7.88(200)

7.88(200)

7.88(200)







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11

2

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3262



3. Connect control wires according to wiring diagrams shown on the label. Use a small screwdriver to open the spring clips and install wires. Wiring diagrams are also located at the end of this bulletin.

4. Route control wires away from the arc chutes. Replace the transparent cover.

Drawout-mounted Circuit Breakers 1. Remove the front terminal cover.

2. Determine the terminal number (1) according to the wiring label (2). Wiring diagrams are also located at the end of this bulletin.

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3262

1 1

2

3

3

2

CAUTIONHAZARD OF EQUIPMENT DAMAGEDo not route control wires close to the arc chutes venting holes. If this is done, wire insulation may melt and/or softening occur during circuit breaker interruption.Failure to follow this instruction can result in equipment damage.

0613

3263

0613

3263

2

1



3. Connect the control wires using a small screwdriver and replace the front terminal cover.

4. Route control wires away from arc chutes.

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3264

F1 F2

WT FV R

Z C MNR

Z11

Z12

Z21

Z22

e+ e- D4

D1

254

262

or2nd MX

C12

C11

orMX XF MN PAF MCH OF1 OF2 OF3 OF4

T1 T2 V V R1

R2 C or

F F O O SDE LT alarm

211

212

221

222

241

244

231

234

81 82 LR1

LR2

84 C2 C1 A4 A1 D4 D1

252

251

262

B4 B1 14 11 12 24 21 22 34 31 32 44 41 42254

Accessories (Right-hand Side)Control Unit (Left-hand Side)

1

2

3

1

3

2

CAUTIONHAZARD OF EQUIPMENT DAMAGEDo not let wires interfere with action of the disconnecting block.Failure to follow this instruction can result in equipment damage.

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3265

48049-071-03 MASTERPACT MP, MF and MC Circuit Breakers01/2002 Section 2Operation


SECTION 2 OPERATION

DISCONNECTING AND CONNECTING INSTRUCTIONS. The circuit breaker has four drawout positions and can be operated in all four

positions. The circuit breaker is captive in all positions except WITHDRAWN.

A closed circuit breaker is automatically opened prior to being connected or disconnected during a racking in or racking out operation.

Connection or disconnection of the circuit breaker requires insertion of the racking crank. Insertion of the racking crank can be prevented by the following stationary assembly accessories: Padlock Key lock Racking interlock

Disconnecting and connecting instructions are summarized on the label provided with the installation instructions. The label must be affixed to the door of the switchboard.

In the CONNECTED position, the primary and secondary disconnecting terminals are engaged, and the circuit breaker is ready for service.

In the TEST position, the primary terminals are disengaged, however, control contacts are connected to permit operation of the circuit breaker. The TEST position is used for testing circuit breaker operation and control system functions. In this position, the circuit breaker is not suitable for internal inspection or any maintenance function.

In the DISCONNECTED position, the primary and secondary disconnect terminals are disengaged and separated by a safe distance from the corresponding stationary terminals.

In the WITHDRAWN position, both primary and secondary contacts are disconnected. The circuit breaker may be removed for complete accessibility.

When a racking crank remains inserted or a circuit breaker is not completely disconnected, the extraction of the right rail is prevented.

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CONNECTED position

TEST position

DISCONNECTED position

WITHDRAWN position

MASTERPACT MP, MF and MC Circuit Breakers 48049-071-03Section 2Operation 01/2002


Disconnecting Instructions

If the circuit breaker is not opened before disconnecting, it will open automatically during disconnection.

1. Remove the racking crank from its storage hole, insert it into the racking slot, and engage the mechanism.

In the case of a racking interlock, press the compartment door closed sensor located at the front of the drawout mechanism to simulate a closed door.

2. To reach the DISCONNECTED position, turn the racking crank counterclockwise until first the TEST, and then DISCONNECTED indication are shown on the position indicator.

3. Remove the racking crank and insert it into the storage hole.

If the racking crank is not removed, the right rail will not fully extend.

4. Using the two extension rail handles, pull the circuit breaker out.5. Remove the circuit breaker using one of the lifting methods explained in

Handling, page 9.







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1 2

connected

test

disconnected

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es



Installing the Circuit Breaker in the Stationary Assembly

1. Pull out the two extension rails by their handles.

When either the racking crank remains inserted in the racking slot or the circuit breaker is not fully disconnected, extraction of the right extension rail is not possible.

2. Install the circuit breaker onto both extension rails, being sure that the two circuit breaker supports located on either side are fully engaged in the rail slots. Refer to Handling, page 9, for methods of lifting the circuit breaker.

3. To move the circuit breaker from the WITHDRAWN position to the DISCONNECTED position, push the extension rail handles into the stationary assembly until they stop.

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CAUTIONHAZARD OF EQUIPMENT DAMAGEDo not let the forks of a fork lift protrude past the rear of the circuit breaker.Do not press on the control unit while pushing the circuit breaker into the stationary assembly.Failure to follow this instruction can result in equipment damage.

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Connecting Instructions

1. Insert and engage racking crank into the racking slot.NOTE: This procedure is possible only if: circuit breaker is in DISCONNECTED position, drawout mechanism padlocks have been removed, key interlock has been unlocked and compartment door is closed.

In case of racking interlock, press the compartment door closed sensor located at the drawout mechanism to simulate a closed door.

2. Turn the racking crank clockwise until the CONNECTED position is reached on the position indicator. Continue cranking until two click sounds are heard indicating the circuit breaker is locked in the connected position.

As the CONNECTED position is neared, more effort will be required to turn the crank.

3. Remove the racking crank and insert it back into the storage hole.







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1 2

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2



OPERATING

Charging Instructions All basic circuit breaker and drawout operations can be performed from the front of the circuit breaker. Suitable electrical and mechanical interlocks are provided to prevent incorrect operation of the circuit breaker. To manually charge an electrically- or manually-operated circuit breaker, push or pull down on the charging handle, six full strokes should be used. When the spring is fully charged, the yellow charged indicator will appear in the stored-energy window on the circuit breaker front cover, the handle stops, and it will return to normal position when released.

Closing Instructions All that is required to close the circuit breaker locally is to push the mechanical push ON button. Pre-charged circuit breakers may be closed remotely via a spring-released solenoid which is standard for electrically operated circuit breakers and optional for manually-operated circuit breakers. Before attempting to close the circuit breaker locally, the stored-energy indicator window must show a yellow charged.''

Circuit breaker can be closed only if: It is opened It is charged Pop-out type fault indicator is correctly reset No remote opening order is intended.

The closing coil (XF) withstands a continuous voltage, providing anti-pumping function. If the circuit breaker is not ready to close when the closing order is intended, inhibit it and try again as soon as the circuit breaker is ready to close. To inhibit the anti-pumping function, wire in series the ready-to-close switch (terminals 251-252) with the closing coil.

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Manual Charging Electrical Charging

ON

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Opening Instructions Opening the circuit breaker locally is accomplished by pushing the mechanical push OFF button on the circuit breaker front cover. Circuit breakers may be opened remotely via either a shunt trip or an undervoltage trip device depending upon the application requirements.

Resetting InstructionsThe mechanical fault indicator (push to reset button) extends to indicate that an overcurrent has occurred and prevents closure of the circuit breaker. Reset by pushing button in.

LOCKING

Locking by Key Interlock

This locking can be in DISCONNECTED position or in all positions: CONNECTED, TEST and DISCONNECTED (upon request).Figure 23: Locking by Key Interlock (VSKC)

Locking in the DISCONNECTED position:

1. Disconnect the circuit breaker,2. insert key and turn counterclockwise and3. remove the key.

OFF

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CAUTIONHAZARD OF EQUIPMENT DAMAGEResetting the circuit breaker with an existing overcurrent or ground-fault condition can result in destructive arcing. Be sure any existing faults are cleared prior to resetting.Failure to follow this instruction can result in equipment damage.

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Figure 22: Locking by Key Interlock (VSKA)

OFF

2

1

3Locking in open position:1. Push the push OFF button2. Insert and turn the key counterclockwise3. Remove the key

2

3

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Locking by Padlock Figure 24: Locking by Padlock (VBP)

Prevent access to: push OFF (switch open) or push ON (switch close) or both push OFF and push ON buttons of the circuit breaker by attaching a padlock.Figure 25: Locking by Padlock Device (Standard)

This locking prevents insertion of the racking crank and racking the circuit breaker into its stationary assembly.Figure 26: Locking by Padlocking Device

Locking by Door Interlock Figure 27: Locking by Door Interlock (VDP)

The door interlock prevents the door from opening when the circuit breaker is in the CONNECTED and TEST positions.

sh OFFO ush ON

I

O

sh OFF

I

ush ON

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Shackle diameter:1/4 to 5/16 in.[6 to 8 mm]

1 2

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Shackle diameter: 1/4 to 5/16 in. [6 to 8 mm]

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The hook can be mounted on either side. To change hook location:

Spring Interlock Figure 28: Spring Charged Interlock

Before pulling out the circuit breaker, discharge the spring by pressing the push ON button, then the push OFF button.

When the closing springs are charged, this interlock prevents the circuit breaker from being disconnected by latching it in the stationary assembly. Use of this locking method is not suitable with an undervoltage trip device.

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AB AB

1

2

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48049-071-03 MASTERPACT MP, MF and MC Circuit Breakers01/2002 Section 3Control Unit Types


SECTION 3 CONTROL UNIT TYPES

Opush OFF

MERLIN GERIN

MP20H1

masterpact

connected

test

disconnected

O OPENdischarged

Ipush ON

circuit breaker3 pole600V 50/60Hz

frame size 2000A

suitable for continious operation

at 100% rating in a minimum cubical

space H17.5 by W21 by D14.1/4 inches

ventilation is not required

interrupting ratingmax RMS sym amp

s

Volts240480600

short time rating 75KA

Amps75K75K75K

IEC 957-2 690V 50/60Hz

interrupting ratingIcu 380/440V

75KA

660V 75KA

Icu 380/440V 75KA

660V 75KA

short time ratingIcw=75KA 0.5 s

ec.

push to reset

I

I1 I2 I3

90%

50%

20%

STR 58 U

Ir

90

105%Ir

.88.9 .92

.95

.981

.8.85

xIo

Im tm

34 5

6

8101.5

2

xIo

.3.4 .3

.1

.1.2

on I2t off

.2

0

Ir fault

tr

Im faulttm

I

faultIh

th

t

i

test

+ S

T +

T

F

Ih th

400500 600

800

1000

1200250320

A

.3.4 .4

.2

.1.2

on I2t off

.3

.1

I

off2xIn

Ir :

Im :

th :

IIG LI

GL

LG

LIG

off

reset V

tr60

120 240

480

1530

at 1,5Ir

4

68 12

17

22

Ic1 Ic2

.86

.9 .93.95

.98

1.8

.85

.7.8 .85

.95

.5.6

xIr

.9

1

R

xIr

test

Io=3000A

cat. no. 54775

for masterpactwith sensors In

= 6000A

E63335UND. LAB. O List.CIRCUIT BREAKE

R

Doles. Issue N LM-879200000

0631

3282

Io = Rating plugln = Sensor ratinglr = Long-time pickuptr = Long-time delaylm = Short-time pickuptm = Short-time delayl = Instantaneous pickup

lh = Ground-fault pickupth = Ground-fault delay

I8

12 1419

22max2

4

xIn

push to reset

STR 18 M

test

+

push to reset

II1 I2 I390%

50%

20%

STR 28 D

90

105%Ir

.88.9 .92

.95

.981.8

.85

xIoIm

34 5

6

8101.5

2

xIr

Ir

Im

t

i

test

+

Ir :

Im :

Ir

push to reset

II1 I2 I390%

50%

20%

STR 38 S

Ir90

105%Ir

.88.9 .92

.95

.981.8

.85

xIoIm tm

34 5

6

8101.5

2

xIr

.3.4 .3

.1.1

.2

on I2t off

.2

0

Ir fault

tr

Im faulttm

I

faultIh

th

t

i

test

+

+

T

F

test

Ih th

400500 600

800

10001200250

320

A

.3.4 .4

.2.1

.2

on I2t off

.3

.1

I

offmax.xIn

Ir :

Im :

th :

overcurrent

ground

push to reset I+T L+IIL+T

L offT

L+I+T

II1 I2 I390%

50%

20%

STR 58 U

Ir tr90

105

tr

%Ir.88

.9 .92.95

.981.8

.85

xIo

60120 240

48015

30

at 1.5Ir

Im tm3

4 56

8101.5

2

xIr

.3.4 .3

.1.1

.2

on I2t off

.2

0

Ir fault

tr

Im faulttm

I

faultIh

th

t

i

test

+

+

T

R

F

test

Ih 1200A Max th400

500 600800

10001200250

320

A

.3.4 .4

.2.1

.2

on I2t off

.3

.1

I8

12 1419

22Max.2

4

xIn

Ic1 Ic2.86

.9 .93.95

.981.8

.85

xIr

.7.8 .85

.95.5

.6

.9

1xIr

V

Ir :

Im :

th :

min.norm

overcurrent

ground

reset V

0631

3283 STR 18 M

Control UnitOvercurrent protection

Instantaneous

Options

None

STR 28 DControl Unit

Overcurrent protection

Long-time Instantaneous

Options

Ammeter

STR 38 SControl Unit


Long-time Short-time Instantaneous

Options

Ammeter Fault Indicators Ground-fault Protection

STR 58 UControl Unit


Long-time Short-time Instantaneous

Options

Ammeter Fault Indicators Ground-fault Protection Zone-selective interlocking Load Monitoring Communication

MASTERPACT MP, MF and MC Circuit Breakers 48049-071-03Section 3Control Unit Types 01/2002


STR 18 M CONTROL UNITDescription

1. Fault trip indicator reset button prevents reclosing of circuit breaker after fault until reset.

2. Current sensor rating (ln)3. Instantaneous setting (can be turned OFF on

N1 and H1 circuit breakers)4. Test the receptacle5. Lock the control unit settings

(captive nuts)

push to reset

STR 18 M

test

+

I8

12 1419

22max2

4

xIn

I8

12 1419

22max2

4

xIn

0631

3284

1

2

3

5

4

5

SettingsInstantaneous Pickup (short-circuit)

BU ME

PBD



1. Before energizing main circuits, open and discharge circuit breaker.

2. Adjust control unit.

3. Close circuit breaker.

4. Test the control unit.

connected

test

dischargedpush

OFFO pu

sh ONI

OFF

disconnected

0631

3285

I6 8 1217

22Max.2

4

push to reset

STR 18 M

I

xIn

0631

3286

In=2000 A

2000 AIn (Example)

N1-H1(8003200 A)

2 8

2 8

N1-H1(40005000 AH2

off

Max

I = 8 x In = 16000 A

I 2 to Max

connected

test

push OFF

O push ON

I

ON

disconnected

0631

3287

push to reset

STR 18 M

I

xIn

MERLIN GERIN

I

xIn

test+

BU ME

0631

3288 The complete test kit can

simulate a short circuit.

With the mini test kit



STR 28 D CONTROL UNITDescription

1. Fault trip indicator reset button prevents reclosing circuit breaker after fault until reset

2. Measure the current3. Indicates the rate of load (%tr)4. Current sensor rating (In)5. Rating plug (Io)6. Adjust lf (long-time setting)7. Adjust Im (instantaneous)8. Overload indicator9. Control unit setting values10. Test the control unit11. Lock the control unit settings

push to reset

II1 I2 I390%

50%

20%

STR 28 D

90

105%Ir

.88.9 .92

.95

.981.8

.85

xIoIm

34 5

6

8101.5

2

xIr

Ir

Im

t

i

test

+

Ir :

Im :

Ir

.88.9 .92

.95

.981.8

.85

xIoIm

34 5

6

8101.5

2

xIr

Ir

0631

3289 Settings

AdjustableIr Long-time setting (overload)Im Instantaneous setting (short-circuit)

Fixedtr Long-time delay

OptionsOption

I see page 38

1

2

3

4

115

6

7

89

1011

I

I

ALR

BU ME

PBD







connected

test

dischargedpush

OFFO pu

sh ONI

OFF

disconnected

0631

3285

Io0.63 0.8

10.5

I.88

.9 .92.95.98

1.8.85

ImI = 2000 A

push to reset

I1 I2 I390%

50%

20%

STR 28 D

Ir

xIoIm

xIot

i

test

I3

4 568

101.52

r

m

n

0631

3290

Io = 1600 A

Example: In = 2000 A; Io = 1600 A; Ir = 1440 A; Im = 7200 A

2000 A

1600 A

In

Io

Ir

Im

0.8 0.55 0.88 0.90 0.93 0.95 0.98 1.0

1.5 2.0 3.0 4.0 5.0 6.0 8.0 10.0

Ir = 0.90 x Io = 1440 A

Im = 5 x Ir = 7200 A

Ir

Im

0.8 to 1 Io

1.5 to 10 Ir

connected

test

push OFF

O push ON

I

ON

disconnected

0631

3287

push to reset

I1 I2 I390%

50%

20%

STR 28 D

Ir

xIoIm

xIot

i

test

xIot

i

MERLIN GERIN

test+

MEBU

0631

3291

The complete test kit can simulate:an overloada short-circuit

With the Mini Test Kit



STR 38 S CONTROL UNITDescription

1. Fault trip indicator reset button prevents reclosing circuit breaker after fault until reset.

2. Measure the current.3. Indicates the rate of load (%tr)4. Current sensor rating (In)5. Overload indicator6. Rating plug (Io)7. Adjust Ir (long-time setting)8. Adjust Im (short-time setting)9. Adjust tm (short-time delay)10. Control unit setting values11. Switch on or off the instantaneous

protection (N1/H1 type only)12. Adjust Ih

(ground-fault protection)13. Adjust th

(ground-fault protection delay)14. Fault trip indicator15. Test the control unit16. Lock the control unit settings17. Save fault trip indicator18. Clear fault trip indicator

and / or check battery level19. Recall the latest fault

trip indicator

push to reset

II1 I2 I390%

50%

20%

STR 38 S

Ir90

105%Ir

.88.9 .92

.95

.981.8

.85

xIoIm tm

34 5

6

8101.5

2

xIr

.3.4 .3

.1.1

.2

on I2t off

.2

0

Ir fault

tr

Im faulttm

I

faultIh

th

t

i

test

+

+

T

F

test

Ih th

400500 600

800

10001200250

320

A

.3.4 .4

.2.1

.2

on I2t off

.3

.1

I

offmax.xIn

Ir :

Im :

th :

overcurrent

ground

20%

1

I

i

F

I

Ir.88

.9 .92.95

.981.8

.85

xIoIm tm

34 5

6

8101.5

2

xIr

.3.4 .3

.1.1

.2

on I2t off

.2

0

TIh th

400500 600

800

10001200250

320

A

.3.4 .4

.2.1

.2

on I2t off

.3

.1

I

offmax.xIn

I

F

T

W

0631

3292

SettingsAdjustable

Ir Long-time setting (overload)Im Short-time setting (short-circuit)tm Short-time delay I2t on or off

OptionsOptionOptionOptionOption

see page 38see page 39see page 41see page 41

1

2

3

4

16567

89

101112

13

141516

17

1819

I

I

ALR

W T

W T

F

BU ME

PBD PIL

+ F PIL

+ F PIL






4. Test the control circuit.

connected

test

dischargedpush

OFFO pu

sh ONI

OFF

disconnected

0631

3285

In = 2000 A 0.5 15Im

34 5

68

101.52

tm.3

.4.3

.2

.10.1

.2

push to reset

I1 I2 I390%

50%

20%

STR 38 S

Ir

xIoIm tm

xIot

i

test

T

F

test

Ih th

xIn

I

xIn

I

Io0.63 0.8

10.5

Ir.88

.9 .92.95.98

1.8.85

Im tm

offMax.xIn

0631

3293

lo = 1600 AExample: In = 2000 A; Io = 1600 A; Ir = 1440 A; Im = 7200 A

2000 A

1600 A

In

Io

Ir

Im

I

0.8 0.55 0.88 0.90 0.930.95 0.98 1.0

1.5

Ir = 0.90 x Io = 1440 A

2.0 3.0 4.0 5.0 6.0 8.0 10.0

Im = 5.0 x Ir = 7200 A

(H1) Max Max Max MaxMax Max Max off

Ir 0.8 to 1.0 Io

Im 1.5 to 10.0 Ir

Max.

off

I

In = 2000 A 0.5 15Im

34 5

68

101.52

tm.3

.4.3

.2

.10.1

.2

push to reset

I1 I2 I390%

50%

20%

STR 38 S

Ir

xIoIm tm

xIot

i

test

T

F

test

Ih th

xIn

I

xIn

I

Io0.63 0.8

10.5

Ir.88

.9 .92.95.98

1.8.85

Im tm

offMax.xIn

0631

3293

Io = 1600 AExample: In = 2000 A; Io = 1600 A; Ir = 1440 A; Im = 7200 A

2000 A

1600 A

In

IoIr 0.8 0.55 0.88 0.900.93 0.95 0.98 1.0

Ir = 0.90 x Io = 1440 A

Im 1.5 2.0 3.0 4.0 5.0 6.0 8.0 10.0

Im = 5 x Ir = 7200 A

Ir

Im

I H1 Max Max Max Max Max Max Max off I

0.8 to 1.0 Io

1.5 to 10.0 Ir

Max

push to reset

I1 I2 I390%

50%

20%

STR 58 U

Ir

xIoIm tm

xIot

i

test

T

R

F

test

Ih th

xIn

I

xIn

Ic1 Ic2

xIr xIr

tr

at 1.5Ir

t

T

R

F

test

Ih th

xIn

I

xIn

Ic1 Ic2

xIr xIr ground

overcurrent

MERLIN GERIN

test+

MEBU

0691

3298

connected

test

dischargedpush

OFFO pu

sh ONI

OFF

disconnected

0631

3285


The complete test kit can simulate:an overloada short-circuita ground-fault



STR 58 U CONTROL UNITDescription

1. Fault trip indicator reset button prevents reclosing of circuit breaker after fault until reset

2. Select the remote indicated fault trip

3. Measure the current

4. Select phase to measure

5. Indicates the rate of load (%tr)6. Maximum protection rating7. Overload indicator8. Rating plug (Io)9. Adjust lr (long-time setting)10. Adjust tr (long-time delay)11. Adjust lm (short-time setting)12. Adjust tm (short-time delay)13. Decrease thermal memory after tripping14. Adjust I (instantaneous)15. Adjust lh

(ground-fault protection)16. Adjust th

(ground-fault protectiondelay)

17. Control unit setting values18. Adjust Ic2 (load monitoring)19. Adjust Ic1 (load monitoring)

20. Test the control unit

21. Save fault trip indicator22. Lock the control unit

settings

23. Clear fault trip indicatorand/or check battery level

24. Recall the latest fault tripindicator

25. Fault trip indicator

push to reset I+T L+IIL+T

L offT

L+I+T

II1 I2 I390%

50%

20%

STR 58 U

Ir tr90

105

tr

%Ir.88

.9 .92.95

.981.8

.85

xIo

60120 240

48015

30

at 1.5Ir

Im tm3

4 56

8101.5

2

xIr

.3.4 .3

.1.1

.2

on I2t off

.2

0

Ir fault

tr

Im faulttm

I

faultIh

th

i

test

+

+

T

R

F

test

Ih 1200A Max th400

500 600800

10001200250

320

A

.3.4 .4

.2.1

.2

on I2t off

.3

.1

I8

12 1419

22Max.2

4

xIn

Ic1 Ic2.86

.9 .93.95

.981.8

.85

xIr

.7.8 .85

.95.5

.6

.9

1xIr

V

Ir :

Im :

th :

min.norm

overcurrent

ground

reset V

Ir tr.88

.9 .92.95

.981.8

.85

xIo

60120 240

48015

30

at 1.5Ir

Im tm3

4 56

8101.5

2

xIr

.3.4 .3

.1.1

.2

on I2t off

.2

0

T

R

Ih 1200A Max th400

500 600800

10001200250

320

A

.3.4 .4

.2.1

.2

on I2t off

.3

.1

I8

12 1419

22Max.2

4

xIn

Ic1 Ic2.86

.9 .93.95

.981.8

.85

xIr

.7.8 .85

.95.5

.6

.9

1xIr

I

F

C Z

W

T

R

FV

0631

3295

1

2

3

4

5

67

891011

12

1314

15

1617

18

1920

21

22232425

SettingsAdjustable

Ir Long-time setting (overload)tr Long-time delayIm Short-time setting (short-circuit)tm Short-time delay I2t on or off

OptionsThermal memory

OptionOptionOptionOptionOptionOptionOptionOption

see page 38see page 39see page 41see page 40see page 41see page 41see page 42see page 42

limitation function

see page 37

FV

I

I

I

ALR

W T

W T

R

R

BU ME

PIL

PBD

+ F PIL

+ F PIL







connected

test

dischargedpush

OFFO pu

sh ONI

OFF

disconnected

0631

3285

I6

8 121722

off24

In = 2000 A

Io0.63 0.8

10.5

Ir.88

.9 .92.95.98

1.8.85

tr60

120 240

48015

30

Im tm

0.5 15

Im3

4 568

101.52

tm.3

.4.3

.2

.10.1

.2

push to reset

I1 I2 I390%

50%

20%

STR 58 U

Ir tr

xIo at 1.5IrIm tm

xIot

i

test

T

R

F

test

Ih th

xIn

I

xIn

Ic1 Ic2

xIr xIrI

Max.2

0631

3296

Example: In = 2000 A; Io = 1600 A; Ir = 1440 A; Im = 7200 A

2000 A

1600 A

0.8 0.55 0.88 0.90 0.93 0.95 0.98 1.0

Ir = 0.90 x Io =1440 A

1.5 2.0 3.0 4.0 6.0 8.0 10.05.0

Im = 5 x Ir = 7200 A

(H2)

In

Io

Ir

Im

I(H1)

2

2

Max

off

Ir

Im

I

0.8 to 1.0 Io

1.5 to 10.0 Ir

2 to Max 2 to off

Io0.63 0.8

10.5

Io0.63 0.8

10.5

Ir.88

.9 .92.95.98

1.8.85

t60

120 240

48015

30

Im3

4 568

101.52

tm.3

.4.3

.2

.10.1

.2

Ir.88

.9 .92.95.98

1.8.85

tr60

120 240

48015

30

Im3

4 568

101.52

t.3

.4.3

.2

.10.1

.2.3

.1.2

.4.3

.2

.10

t

t

on I2t

I2t off

push to reset

I1 I2 I390%

50%

20%

STR 58 U

Ir tr

xIo at 1.5IrIm tm

xIot

i

test

T

R

F

test

Ih th

xIn

I

xIn

Ic1 Ic2

xIr xIr

15480 str

m

r

m

m

0691

3297

tmI2t off

0 to 0.4 s

ontm

2t

0.1 to 0.3 s

push to reset

I1 I2 I390%

50%

20%

STR 58 U

Ir

xIoIm tm

xIot

i

test

T

R

F

test

Ih th

xIn

I

xIn

Ic1 Ic2

xIr xIr

tr

at 1.5Ir

t

T

R

F

test

Ih th

xIn

I

xIn

Ic1 Ic2

xIr xIr ground

overcurrent

MERLIN GERIN

test+

MEBU

0691

3298

connected

test

dischargedpush

OFFO pu

sh ONI

OFF

disconnected

0631

3285


The complete test kit can simulate:an overloada short-circuita ground-fault



CONTROL UNIT OPTIONS

Pre-trip and Overload Indication OptionThe pre-trip and overload indication is standard with all control units except STR 18 M. The overload indicator is a light-emitting diode (LED) which is: On when the current exceeds 90% of the current setting. Flashing on overload when current exceeds 105120% of current

setting.

The pre-trip alarm switch is a contact (LR1LR2) which closes when the circuit breaker is in the overload zone. It opens if the load decreases below the overload zone or if the circuit breaker trips.For wiring diagram, see page 46.

When a dc power source is used, power has to be temporarily disconnected to reset the optical triac contacts.

ALR

0.63Io Ir

0.8

0.5 1

xIn

.88.9 .92

.95

.981.8

.85

xIoIm tm

34 5

6

8101.5

2

xIr

.3

.2

0.63Io Ir tr

0.8

0.5 1

xIn

.88.9 .92

.95

.981.8

.85

xIo

60120 240

48015

30

at 1.5Ir

Im tm3

4 56

8101.5

2

xIr

.3.4 .3

.1.1

.2

on I2t off

.2

0

90

105%Ir

push to reset

I1 I2 I390%

50%

20%

STR 28 D

t

i

test

Io Ir

xIn xIoIm

xIo

0.63Io Ir

0.8

0.5 1

xIn

.88.9 .92

.95

.981.8

.85

xIoIm

34 5

6

8101.5

2

xIr

90

105%Ir

.4 .3

.1.1

on I2t off

.2

0

+

+

+

90

105%Ir

90

105%Ir

0631

3299

STR 28 D

STR 38 S

STR 58 U

LED

OFF:I < 0.9 Ir

ON:0.9 Ir 1.05 Ir

Flashing:I > 1.05 Ir



Thermal Memory Limitation Thermal memory is standard on the STR 38 S and STR 58 U trip units. The thermal memory function remembers the thermal heating from each time the pickup setting is exceeded.It operates: Before tripping on long-time and ground-fault protection (if provided). After tripping on long-time protection only; the time-constant depends on

the internal temperature of the circuit breaker.

Any temporary overload generates an overheating value, which is stored. A series of temporary overloads will be integrated into this overheating value. Storing of this value results in reduced tripping time so the reaction of the trip unit will be closer to the real heating seen by the system. The internal temperature rise of the circuit breaker is measured by thermal resistors. The cooling time constant of the memory depends on the over-temperature condition. The standard version of the control unit STR 58 is fitted with a min/max position switch.The min position cancels the thermal memory and must only be used in emergencies where reclosing on a fault is essential.WARNING

HAZARD OF PERSONAL INJURY OR EQUIPMENT DAMAGE.Use min position only for emergency, when reclosing on fault is absolutely necessary.Failure to follow this instruction can result in serious personal injury or equipment damage.

tr

push to reset

I1 I2 I390%

50%

20%

STR 58 U

Ir

xIo at 1.5IrIm tm

xIo

i

test

T

R

F

test

Ih th

xIn

I

xIn

Ic1 Ic2

xIr xIr

xIn

t

t

t

t

t

t

II

t

t

t

t

t norm

t

t = f( ACB)

t

II

t

t norm.

t min.

r

r

r

r

r x

r

x

r r t min.

r r

r

r

r

0691

3300



Ammeter OptionI1, I2, I3: Phase current

Im: Maximum instantaneous current

max: Maximum current stored since the last reset

Ih: Ground-fault current

I

STR 38 S

I

push to reset

I1 I2 I390%

50%

20%

STR 38 S

I

push to reset

I1 I2 I390%

50%

20%

push to reset

I1 I2 I390%

50%

20%

STR 38 S

I

push to reset

I1 I2 I390%

50%

20%

STR 38 S

I

IM I1 I2 I3

push to reset

I1 I2 I390%

50%

20%

STR 38 S

I

max

push to reset

I1 I2 I390%

50%

20%

STR 38 S

I

max

push to reset

I1 I2 I390%

50%

20%

STR 38 S

I

max

push to reset

I1 I2 I390%

50%

20%

STR 38 S

I

Ih

push to reset

I1 I2 I390%

50%

20%

STR 38 S

I

IN

push to reset

I1 I2 I390%

I

Im

Im

0631

3301



Fault Indication OptionThree light-emitting diodes (LEDs) indicate separately long-time, short-time/instantaneous and ground-fault trip. A flat push button allows resetting of the indicator after tripping.A separate power supply is required to maintain the fault indication after the circuit breaker trips. Two options are offered: Connecting a reliable 24 Vdc control voltage on F1-F2. Auxiliary power

module is used for other voltages. When the control source is unreliable, a bettery pack (BAT) is added to power module.

From a built-in battery module. When no external control source is available, a built-in battery module may be ordered (option PIL). This module integrates battery testing and indicator resetting buttons.

F

Ih

xIn

xIn

Ic1

push to reset

I1 I2 I390%

50%

20%

STR 58 U

Ir tr

xIo at 1.5IrIm tm

xIo

test

T

R

th

I

Ic2

xIr xIr

t

i

F

test

Ir :

Im :

th :tr

Im faulttm

I

faultIh

th

t

i

test

Ir faulttr

Im faulttm

Ifault

Ih

th

t

i

test

Ir :

th :

tm :Ir fault

F

test

tr

Im faulttmI

faultIh

th

t

i

test

Ir :

Im :

th :

Ir fault

F

test

0631

3302

Turns off after two minutes (if internal battery power supply). Call it back then reset it.



Battery Option

Load Monitoring OptionThe option R provides two independant static contacts which operate when the current exceeds adjustable pickup limits. When the current exceeds the limit Ic1 (or Ic2) the contact C-R1

(or C-R2) closes, following an inverse time characteristic a. When the current drops below the limit Ic1 (or Ic2) the contact C-R1

(or C-R2) opens with constant time delay (10 seconds) b.For wiring diagram see page 46.

\

tr

push to reset

I1 I2 I390%

50%

20%

STR 58 U

Ir

xIo at 1.5IrIm tm

xIo

i

test

T

R

Ftest

Ih th

xIn

I

xIn

Ic1 Ic2

xIr xIr

t

F Test

F Test

F Test

led

F Test

Lithium

3,5V - 85

0mA/hS A F

T

0631

3303

Lithium BatterySize: 3.6 V - 850mA/hType: SAFT LS3

SONNENSCHEINTEL-S

Battery Test

1

2

34

5

6

7

R

Ih

xIn

xIn

Ic1

push to reset

I1 I2 I390%

50%

20%

STR 58 U

Ir tr

xIo at 1.5IrIm tm

xIo

test

T

R

th

I

Ic2

xIr xIr

t

i

F

test

Ir :

Im :

th :tr

Im faulttm

I

faultIh

th

t

i

test

Ir faulttr

Im faulttm

Ifault

Ih

th

t

i

test

Ir :

th :

tm :Ir fault

F

test

tr

Im faulttmI

faultIh

th

t

i

test

Ir :

Im :

th :

Ir fault

F

test

0631

3302

Turns off after two minutes (if internal battery power supply).

Call it back. then reset it.



Segregated Alarm Switch OptionThis switch works like the standard overcurrent trip switch (SDE) except a selector switch on the control unit is used to choose the type of fault which will operate the contact: overload, short-circuit, ground-fault or any combination of these types. This option can be used in addition to the SDE switch for remote signaling of particular types of faults.A flat push button allows resetting of the indicator after tripping.

Ground-fault Protection Option

Use 24 Vdc module when circuit breaker has ground-fault trip unit and when load is less than 20% of sensor or ground-fault pick-up is set in the red* (lower) zone.

FV

F

testreset V

I+T L+II

L+TL off

T

L+I+T

Ih

xIn

xIn

Ic1

I1 I2 I390%

50%

20%

STR 58 U

Ir tr

xIo at 1.5IrIm tm

xIo

test

T

R

th

I

Ic2

xIr xIr

t

i

push to reset

F

test

0631

3305

Selector Switch

Fault Type

Overload Short-circuit Ground-faultL 1 0 0L + T 1 0 1I 0 1 0I + T 0 1 1L + I 1 1 0L + I + T 1 1 1T 0 0 1Off 0 0 0

To reset remote indicator contact (V output)

V

= 0

V

V

V

V

V

= 1

1 2

T or W

xIn

i RIc1 Ic2

push to reset

I1 I2 I390%

50%

20%

STR 58 U

Ir tr

xIo at 1.5IrIm tm

xIot

test

F

test

I

xIr xIr

Ih th

xIn

Tth

400500 600

800

10001200250

320

A

.3.4 .4

.2.1

.2

.3

.1

Ih 1200A Max

on I2t off

TIh 1200A Max th

400500 600

800

10001200250

320

A

.3.4 .4

.2.1

.2

.3

.1

on I2t off

400

250320

0631

3306

*Red zone

Ih 0.1 to 1.0 In Max 1200 A

0.1 to 0.4 sec.

I2t on

Ih 0.1 to 1.0 In Max 1200 A

I2t off0.1 to 0.4 sec.

thT = Residual sensingW = Source ground return



Zone-selective Interlocking Option Option Z on the STR 58 U trip unit provides selective interlocking of short-time or ground-fault tripping.A control wire links several trip units in the distribution network, as shown in the figure below.In the event of a fault, the trip unit will obey the pre-set delay only if receiving a signal from the downstream unit. If not receiving a signal, tripping will be instantaneous (time delay corresponding to 0.1 setting of short-time protection). The fault is cleared instantaneously by the nearest circuit breaker. Thermal stresses (It) in the network are minimized, without any affect on

the correct time delay coordination in the installation.NOTE: On drawout circuit breakers, terminals are delivered with in terminals jumpered. Remove the jumper when interlocking with a downstream circuit breaker. The MASTERPACT circuit breaker may also be interlocked with

COMPACT CK type molded case circuit breakers with zone-selective interlocking option.

Do not ground.Fault 1

Circuit breaker (A) will clear the fault instantaneously, regardless of its time delay setting.Fault 2

Circuit breaker (B) will inform upstream circuit breaker (A) that it is clearing the fault so that circuit breaker (A) does not trip instantaneously. Circuit breaker (A) will trip at the end of its time delay setting if the fault is not cleared during this time.

Transmit Data from Trip Unit OptionThe DIGIPACT connections communicate over MODBUS (J Bus) and require the STR 58 U control unit with option C (communications) and modules: DC 150: Data concentrator SC150: Product indication and control interface

Z

Table 9: Control Cable

Cable size #18#14 AWG (1.5 mm2)Max. length 60 ft. (20m)

Wiring Twisted in pairs one turn per 4 in. (10 cm)

No. of circuit breakers Upstream: 2downstream; no limit

A

out

in in in

Z12Z11

Z22Z21

out

in

out

in

2

1

Z12Z11

Z22Z21

Z12Z11

Z22Z21

Z12Z11

Z22Z21

Z12Z11

Z22Z21

Z12Z11

Z22Z21

out

in

out outB

0631

3307

C



PowerLogicCIRCUIT MONITOR

0631

3308

With DIGIPACT Modules

SC150 DC150Data Concentrator

SC150

With POWERLOGIC Circuit MonitorsNetwork (SY/MAX)

Circuit Monitor

Table 10: MASTERPACT Communications Functions

FunctionDIGIPACT POWERLOGIC Circuit Monitors

SC150 2050 2150 2250 2350Basic Protection and SwitchingStatus (open/closed/tripped) c c c c cRemote control (open/closed) c c c c cPre-trip overload indication c Connected/disconnected position c c c c cLoad monitoring (option R) c Internal temperature alarm c Amps per phase (Ia, Ib, Ic, In) c c c c cTrip time/date c c cTrip type (LS/IG) c c c c cLong-time alarm c c c cMagnitude of current interrupted 1 1 1Trip history c c cTrip unit settings c MeteringAmps-instantaneous c c c cAmps-peak demand c c c cVolts (II and LG) c c c cPower (instantaneous) VA, VAr, W c c c cPower (demand) VA, VAr, W c c c cAdvanced ProtectionVoltage imbalance c c c cCurrent imbalance c c c cReverse power flow c c c cReverse phase c c c cFrequency out of limits c c c cPower Qualitythd (amperages and voltage) c c c cHarmonics (amperages and voltage) c cWaveform (amperages and volts) c cSags/swells cVoltage disturbance c c c c1The circuit monitor input current is limited to 7.5 A. To obtain magnitude of current interrupted,

the current transformers must be oversized appropriately.

MASTERPACT MP, MF and MC Circuit Breakers 48049-071-03Section 4Maintenance 01/2002


SECTION 4 MAINTENANCE

ROUTING INSPECTIONS

ELECTRICAL MAINTENANCE





Replace all devices, doors, and covers before turning on power to this equipment.


Perform Routine External Inspection: By: Annually for normal operating conditions and After every 1000 operations for harsh

operating conditions

Opening and closing the circuit breaker manually Opening and closing the circuit breaker remotely, using the different

auxiliaries successively Testing operation of the control unit with the mini test kit or the complete

test kit

Perform Routine External Inspection: By Checking: After circuit breaker opens on a short circuit

or

Every two years for normal operating conditions or

Annually for harsh operating conditions

Condition of arc chutes Condition of contacts Tightness of connections Condition of clusters

Perform Electrical Maintenance: By Replacing: When the maximum allowable electrical

operation without maintenance is reached When the maximum allowable electrical

operation with maintenance is reached

Arc chutes Arc chutes Main contacts

Perform Electrical Maintenance: By Replacing: When the maximum allowable mechanical

endurance without maintenance is reached The electrical charging mechanism The main contacts The two toggle return springs Mechanical interlocking

48049-071-03 MASTERPACT MP, MF and MC Circuit Breakers01/2002 Section 4Maintenance


CHECK ARC CHUTES

Check Contacts Close the circuit breaker to check the wear of the contacts.







0631

3309

Disconnect power and loosen screws.

Pry up arc chute.

0631

3310

Lift arc-chute out of circuit breaker.

Check the condition of the arc chute: arc chute body not broken, separators not corroded, if necessary, replace the arc chute

0631

3311

4000 A x 3Good contacts Worn contacts

0631

3312

4000 A x 4Good contacts Worn contacts

MASTERPACT MP, MF and MC Circuit Breakers 48049-071-03Section 4Maintenance 01/2002


WIRING DIAGRAM

Circuit breaker shown in connected, charged and open position, undervoltage release energized.

0631

3313

Drawout Position Switches Auxiliary Switches Remote Operation

Connected

Connected

Disconnected Test Standard Heavy DutyUndervoltage Trip Device or

Shunt Trip

Ready-to-close

Motor Operator

Disconnected TestClosed

Open

Remote Open

Remote Close

Spring Charged

314312

324322

334332

344342

352354

362364

372374

311 321 321 321 351 361 371

212222

234244

1214

2224

3234

4244

D4C2

A4252

254262

B4

F F O O

standardOF

M

MN MX XF

211221

231241

11 21 31 41 D1 C1 A1 251 B1

48049-071-03 MASTERPACT MP, MF and MC Circuit Breakers01/2002 Section 4Maintenance


1

+_

0631

3314

Remote Fault and Overload Indication

Ammeter Ground-fault ProtectionLocal Fault Indications and Remote Selected Fault Indication

Zone-selective Interlocking

Load Monitoring

Data Transmission

Fault Alarm

Overload Alarm

82 841 LR2

S2 S1

T2 T1

Selected Fault

Communication

Upstream Circuit Breaker

V Z11 Z12 R1 R2

Ic1

Ic2

e+ e-

Communication Network3

SDELT alarm

I option4 T or W option5

LT ST Gnd

F or FV option6 V

out

Z optionin

R option

C option

81 LR1 F1 F2

24 Vdc

Z212 Z22 C

Downstream Circuit Breaker

1 84 terminal not available with Z or C option.

2 Zone-selective interlocking with downstream circuit breaker requires removal of jumper from drawout circuit breaker.

3 Communication output through DIGIPACT module.

4 Use 24 Vdc supply if I max, information is to be retained after the circuit breaker has tripped.

5 Use 24 Vdc supply for lower setting of ground-fault pickup (red zone), or when load is less than 20% of sensor rating.

6 Use 24 Vdc supply for F option if not supplied with PIL (battery) option.Use 24 Vdc supply (mandatory) for FV option.

48049-071-03 MASTERPACT MP, MF and MC Circuit Breakers01/2002 Section 5Set-up Guide


SECTION 5 SET-UP GUIDE

MINIMUM ENCLOSURE The following tables indicate the minimum compartment size in which the circuit breaker has been tested and is suitable for continuous operation at 100% rating.Figure 29: Drawout Circuit Breaker (with Arc Chute Cover)

Table 11: Dimensions

Table 12: Ventilation

0631

3315

W D

H

X X


Dimension MP08MP20in. (mm)MP25MP30in. (mm)

MP40MP50in. (mm)

MC08MC20in. (mm)

MC32in. (mm)

MC40MC50in. (mm)

H 17.50 (440) 26.00 (660) 26.00 (660) 17.50 (440) 22.00 (560) 26.00 (660)W 21.00 (530) 21.00 (530) 34.00 (670) 21.00 (530) 25.25 (650) 34.00 (670)D 14.25 (360) 14.25 (360) 14.25 (360) 14.25 (360) 14.25 (360) 14.25 (360)X-minimum 0 0 4.30 (110) 0 4.30 (110) 4.30 (110)


Ventilation MP08MP20in. (mm)MP25MP30in. (mm)

MP40MP50in. (mm)

MC08MC20in. (mm)

MC32in. (mm)

MC40MC50in. (mm)

(both top and bottom) None 30.00 (200) 30.00 (200) None 30.00 (200) 30.00 (200)



CLEARANCE INFORMATION Dimensions shown are for the maximum interrupting current of the circuit breaker.Figure 30: Drawout Circuit Breaker (with Arc Chute Cover)

Figure 31: Fixed Circuit Breaker (with Arc Chute Cover)

0631

3316 Min. = 0 Min. = 0

Min. = 0 Min. = 0

3.94 in.[100 mm]

0631

3317

Min. = 0 Min. = 03.94 in.[100 mm]

Min. = 0 Min. = 0 7.88 in.[200 mm]

MASTERPACT MP, MF and MC Circuit Breakers 48049-071-03Section 5Set-up Guide 01/2002


STACKING CONFIGURATIONS The following table shows some possible circuit breaker stacking configurations. These examples apply when the circuit breaker is used either as a main, a tie or a feeder circuit breaker.

The depth of the circuit breaker zone (14.25 in. [362 mm]) is equal to the depth of the circuit breaker compartment.

NEC 380-8 requires all switches and circuit breakers used as switches to be located so that they may be operated from a readily accessible location. They shall be installed so that the center of the switch or circuit breaker operating handle grip, when in its highest position, will not be more than 6.5 ft. (1.98 m) above the floor or working platform.

Customer allowable cumulative loading is as recommended in ANSI C 37.20.1.

Type MP, which is UL Listed under UL 489, is intended to be mounted in switchboards.

Type MC, which is UL Listed under UL 1066, is intended to be mounted in switchgear.

0631

3318

90.00 in.[2286 mm]

MP08 / MP12MP16 / MP20MC08 / MC16MC20

17.5

MP08 / MP12MP16 / MP20MC08 / MC16MC20

17.5

MP08 / MP12MP16 / MP20MC08 / MC16MC20

17.5

MP08 / MP12MP16 / MP20MC08 / MC16MC20

17.5

84.00 in.[2134 mm]

MP25 / Blank

26

MP25 / MP30

26

MP25 / MP30

26

21.00 in.[533 mm]

21.00 in.[533 mm]

: Ventilation

25.25 in.[641 mm]

34.25 in.[870 mm]

14.25 in.[362 mm]

Blank Compartment

MC32

22

22

MC32

Blank Compartment

MP40 / MP50MC40 / MC50

MP40 / MC40 / Blank

Circuit Breaker

Zone



CUMULATIVE LOADING

Allowable cumulative loading can be based on equal loading or higher loading in the lowest compartment.

Table 13: Allowable Cumulative Loading Values Per Compartment Section

Circuit Breaker Type Frame Size (A)

Number of Circuit Breakers Carrying Load

Allowable Cumulative Load

MP08 and MC08 800

1 800*2 1300*3 1800*4 2200*

MP12 1200

1 12002 19003 27004 3400

MP16 and MC16 1600

1 1600*2 2600*3 3600*4 4500*

MP20 and MC20 2000

1 2000*2 3200*3 45004 5600

MP25 25001 25002 40003 5600

MP30 30001 3000*2 4800*

MP32 32001 32002 5100

MP40 and MC40 40001 4000*2 6400

MP50 and MC50 5000 1 5000

*ANSI C37.20.1 values.

MASTERPACT MP, MF and MC Circuit Breakers 48049-071-03Section 5Set-up Guide 01/2002


TEMPERATURE DERATING The continuous current rating is based on use in a 40C ambient temperature environment, inside an enclosure. Continuous current ratings must be derated for ambient temperatures above 40C, as indicated in the following tables.

Table 14: Continuous Current Rating Based on Temperature Ambient

Mounting Ambient TemperatureCircuit Breaker Type

MP08H MP12H MP16H MP20H MP25H MP30H MP40H MP50H MP63H

Drawout

40C45C50C55C60C

800800800800

800

1200120012001150

1100

1600160015501450

1350

2000200020001900

1800

2500250025002400

2300

3000290027502600

2450

4000390037003500

3300

5000500048004500

4200

6300600057005400

5100

Fixed

40C45C50C55C60C

800800800800800

12001200120012001150

16001600160015501450

20002000200020001900

25002500250025002400

30003000290026002450

40004000390037003300

50005000500048004500

MC08N MC08H MC16H MC20H MC

masterpact str units

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