type cp reverse phase relay instruction leaflet - abb ltd · 41-222.2j type cp reverse phase relay...

41-222.2J Type CP Reverse Phase Relay

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Sub 5184A202

Fig. 2. Internal Schematic of the Type CP Relay with Independent Contacts in the Type FT-11 Case.

Fig. 1. Type CP Relay Without Case.

Type CP Reverse Phase Relay 41-222.2J

Fig. 3. Internal Schematic of the Type CP Relay in theType FT-11 Case.

Fig. 4. Internal Schematic of the Type CP Relay with Indicating Contactor Switch in the Low VoltageCircuit in the Type FT-11 Case.

Sub 1183A962

Sub 1183A960

cient to reduce the relay torque to its low voltage trippoint.

B. INDICATING CONTACTOR SWITCH (ICS)

The indicating contactor switch is a small d-c oper-ated clapper type device. A magnetic armature, towhich leafspring mounted contacts are attached, isattracted to the magnetic core upon energization ofthe switch. When the switch closes, the moving con-tacts bridge two stationary contacts, completing thetrip circuit. Also, during this operation two fingers onthe armature deflect a spring located on the front ofthe switch, which allows the operation indicatortarget to drop. The target is reset from the outside ofthe case by a push rod located at the bottom of thecase.

The front spring, in addition to holding the target, pro-vides restraint for the armature and thus controls thepickup value of the switch.

An ac indicating contact switch (ACS) is used wherethe relay contacts connect to an ac trip or control cir-cuit.

C. INDICATING VOLTAGE SWITCH (IVS)

The indicating voltage switch has the same construc-tion as the indicating contactor switch.

3.0 CHARACTERISTICS

The type CF relay has adjustable high and lowvoltage contacts which can be set around the periph-ery of a scale. The ranges of adjustment of the con-tacts are as follows:

120 volt relay - - - - - - - - - - - - - - - - - -70 to 120 volts240 volt relay - - - - - - - - - - - - - - - - - 140 to 240 volts480 volt relay - - - - - - - - - - - - - - - - - 280 to 480 volts208 volt relay - - - - - - - - - - - - - - - - - 120 to 220 volts

If either of the adjustable contacts are set for a valueof voltage within these ranges, the relay will justclose its contacts when the balanced three phaseline to line voltages equal this value. For such a con-dition, the relay is operating at its minimum trip point,and the operating times on repeated operations arenot repetitive within close tolerances. However, volt-ages greater than the overvoltage setting or less thanthe undervoltage setting, result in relay timing opera-tions which are consistent for repeated trials.

The relay has inverse timing; that is, the greater theincrease in voltage the faster the relay contacts willclose. Typical time curves for various contact set-tings are shown in Figs. 6 and 7.

TRIP CIRCUIT

The main contacts will close 30 amperes at 250 voltsd-c and the seal-in contacts of the indicating contac-

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tor switch (when supplied) will carry this current longenough to trip a circuit breaker.

The indicating contactor switch (when supplied) hastwo taps that provide a pickup setting of 0.2 or 2amperes. To change taps requires connecting thelead located in front of the tap block to the desiredsetting by means of a screw connection.

TRIP CIRCUIT CONSTANT

Indicating contactor switch (ICS) (When Supplied).

0.2 ampere tap - - - - - - -6.5 ohms d-c resistance2.0 ampere tap - - - - - - 0.15 ohms d-c resistance

INDICATING VOLTAGE SWITCH (IVS) (WHEN SUPPLIED)

The indicating voltage switch (IVS) has a seriesresistor. The IVS will operate when 80% d-c ratedvoltage is applied to the IVS circuitry.

4.0 INSTALLATION

The relays should be mounted on switchboardsepa-rated to allow for a minimum contact gap of panels ortheir equivalent in a location free from dirt, moisture,excessive vibration and heat.

Mount the relay vertically by means of the rearmounting stud or studs for the type FT projectioncase or by means of the four mounting holes on theflange for the semi-flush type FT case. Either thestud or the mounting screws may be utilized forgrounding the relay. External toothed washers areprovided for use in the locations shown on the outlineand drilling plan to facilitate making a good electricalconnection between the relay case, its mountingscrews or studs, and the relay panel. Ground wiresshould be affixed to the mounting screws or studs asrequired for poorly grounded or insulating panels.Other electrical connections may be made directly tothe terminals by means of screws for steel panelmounting or to the terminal stud furnished with therelay for thick panel mounting. The terminal stud maybe easily removed or inserted by locking two nuts onthe stud and then turning the proper nut with awrench.

For detail information on the FT case refer to Instruc-tion Leaflet 41-076.

5.0 SETTINGS

There are two independent relay adjustments. Theseare the high and low voltage contact settings asdescribed under “Characteristics”. These settingsdetermine the balanced three phase line-to-linevoltage at which the relay contacts trip. The relaytiming is not an independent adjustment, since it isfixed by the contact settings chosen. Typical timecurves for various contact settings are given in Figs.6 and 7.

For motor protection set the low-voltage contact atthe minimum permissible operating voltage. (Thiscontact may also close when the motor is operatedsingle-phased, provided the open phase voltage isnot held too close to normal by the motor. A motoroperating near full load or a motor connected in par-allel with substantial static load will not be able tomaintain near normal open-phase voltage.) Wherethe high voltage contact supervises supply breakerclosing, it must be set lower than normal voltage. Forexample, set the high-voltage contact at 90% and thelow-voltage contact at 80% of rated voltage. The highand low-voltage contacts must be sufficiently sepa-rated to allow for a minimum contact gap of about0.020 inch. This corresponds to a voltage settingseparation of about 7%.

Fig. 5. Internal Schematic of the Type CP Relay with Indi-cating Contactor Switch in the High Voltage Circuitin the Type FT-11 Case.

183A961Sub 1

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Fig. 6. Typical Overvoltage Time Curves for the Type CPRelay.

Fig. 7. Typical Undervoltage Time Curves for the TypeCP Relay.

471072 471071

INDICATING CONTACTOR SWITCH (ICS) (When Supplied)

No setting is required on the ICS unit except theselection of the 0.2 or 2.0 ampere tap setting. Thisselection is made by connecting the lead located infront of the tap block to the desired setting by meansof the connecting screw. When the relay energizes a125 volt or 250 volt d-c type WL relay switch, orequivalent, use the 0.2 ampere tap. For 48 volt d-capplications set ICS in 2 ampere tap and useS#304C209G01 type WL relay or equivalent.

INDICATING VOLTAGE SWITCH (IVS) (When Supplied)

No setting is required on the IVS unit except for theselection of the required voltage tap on the tappedresistor.

6.0 ADJUSTMENT AND MAINTENANCE

The proper adjustments to insure correct operation ofthis relay have been made at the factory. Upon

receipt of the relay, no adjustments, other than thosecovered under “Settings”, should be required.

ACCEPTANCE CHECK

The following check is recommended to insure thatthe relay is in proper working order:

A. CP UNIT

1. Contacts - Set the left-hand adjustable contactin the center of the scale and adjust the voltageuntil the moving contact just makes. Set the left-hand contact back out of the way and bring theright-hand contact up until the contacts justmake. The pointer should be within ± 1/32” ofwhere the left-hand pointer was.

2. Minimum Trip Voltages - Check the scalemarkings by setting either of the two contacts ata value marked on the scale, then alternatelyapply this voltage plus 3% and minus 3%. Con-tacts should make and break.

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Fig. 8. Diagram of Test Connection for Checking the Undervoltage Time Curves of the Type CP Relay.

Fig. 9. Diagram of Test Connection for Checking the Overvoltage Time Curves of the Type CP Relay.

Sub 3184A199

Sub 2184A195

Check all of the scale markings in a similarmanner.

3. Time Curve - The time curve can be checked bythe use of the circuits of Figs. 8 and 9.


Close the main relay contacts and pass sufficient d-ccurrent through the trip circuit to close the contacts ofthe ICS. This value of current should not be greaterthan the particular ICS setting being used. The indi-cator target should drop freely.

The contact gap should be approximately .047"between the bridging moving contact and the adjust-able stationary contacts. The bridging movingcontact should touch both stationary contacts simul-taneously.

C. INDICATING VOLTAGE SWITCH (IVS)

Close the main relay contacts and apply rated d-cvoltage across terminals 1 and 10. The contacts ofthe IVS unit should close and the indicator targetshould drop freely.

6.1 ROUTINE MAINTENANCE

All relays should be inspected periodically and thetime of operation should be checked at least onceevery year or at such other time intervals as may bedictated by experience to be suitable to the particularapplication.

All contacts should be periodically cleaned. A contactburnishes S#182A836HO1 is recommended for thispurpose. The use of abrasive material for cleaningcontacts is not recommended, because of the dangerof embedding small particles in the face of the softsilver contact and thus impairing the contact.

6.2 CALIBRATION

Use the following procedure for calibrating the relay ifthe relay has been taken apart for repairs, or theadjustments have been disturbed. This procedureshould not be used until it is apparent that the relay isnot in proper working order (See “AcceptanceCheck”).

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A. CP UNIT

1. Contacts - Apply sufficient voltage to the relay,to make the disc float in the center of its travel.Move either of the adjustable contacts until it justmakes with the moving contact. If, the two con-tacts pointers do not meet at the same point onthe scale, adjust the follow on both adjustablecontacts. The contacts should just make with themoving contacts when the pointers meet on thescale. Approximately the same follow should bein each of the adjustable stationary contacts.

2. Minimum Trip Voltage - The adjustment of thespring tension in setting the minimum trip voltageis most conveniently made with the dampingmagnet removed.

Set either of the adjustable stationary contacts in thecenter of its travel. (For example, on the 120 voltrelay, set the contact on the 95 volt setting.) Applythis voltage to the relay. Wind up the spiral spring bymeans of the spring adjuster until the stationarycontact and moving contact just make.

Check the other scale markings by setting the adjust-able contact on these markings and applying the cor-responding voltage. The moving contact shouldmake and break within plus or minus 3% of the valuemarked on the scale.

3. Time Curve Calibration - Install the permanentmagnet and connect the relay as per the circuitof Fig. 8.

Set the high voltage contact on 100 volts and the lowvoltage contact on 70 volts. (For the 240 volt relay,multiply these values by two. Similarly for the 480volt relay, multiply these values by four.) For the 208volt relay set the high voltage contact on 170 voltsand the low voltage contact on 120 volts. Apply ratedvoltage and frequency to the relay to allow the highvoltage contact to make. Suddenly drop the voltageto zero and adjust the permanent magnet gap untilthe relay operates in 3.7 ± .15 sec.

Check the closing time of the high voltage contact byuse of Fig. 9. With the voltage originally zero, sud-denly apply rated voltage and frequency to the relay.The high voltage contact should close in 3.9 seconds± 0.2 sec.


Close the main relay contacts and pass sufficient d-ccurrent through the trip circuit to close the contacts ofthe ICS. This value of current should not be greaterthan the particular ICS setting being used. The indi-cator target should drop freely.

7.0 RENEWAL PARTS

Repair work can be done most satisfactorily at thefactory. However, interchangeable parts can be fur-nished to the customers who are equipped for doingrepair work. When ordering parts, always give thecomplete nameplate data.

8.0 ENERGY REQUIREMENTS

The type CP relay when energized at rated fre-quency and voltage balanced 3 phase has the follow-ing VA burden for each phase.

The continuous voltage rating of the relays is 110%of rated voltage.

Freq.Hertz Phase Watts Vars VA

LaggingPowerFactorAngle

60 Phase APhase B Phase C

.25

.37 1.11

2.821.922.50

2.831.962.73

857966

50Phase APhase BPhase C

.35

.531.48

3.372.282.79

3.392.343.16

847762

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Fig. 10. Relay Type CP Reserve Phase, 3 Phase, 3 or 4Wire, S.P.D.T., with ac Independent VoltageSwitch in Type FT-11 Case.

Fig. 11. Relay Type CP Reserve Phase, 3 Phase, 3 or 4 Wire, S.P.D.T. Contacts with Indicating ac Contactor Switch in Low Voltage Circuit in Type FT-11 Case.

Sub 1184A469

Sub 1184A836


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Fig. 12. External Schematic Diagram of the Type CP Relay in the Type FT-11 Case.*

Sub 1184A200


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Fig. 13. Relay Type CP Reverse Phase, 3 Phase, 3 or 4, S.P.D.T. with A.C.S. in Low Voltage Circuit and with A.C. Independent Voltage Switch in Type FT-11 Case.

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Sub 3879A900

ABB Inc.4300 Coral Ridge DriveCoral Springs, Florida 33065Telephone: +1 954-752-6700Fax: +1 954-345-5329www.abb.com/substation automation

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type cp reverse phase relay instruction leaflet - abb ltd · 41-222.2j type cp reverse phase relay...

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