effective november 2016 supersedes july 2015 installation ... · effective november 2016...

Instruction Leaflet IL01301015EEffective November 2016Supersedes July 2015

ContentsDescription Page

General information . . . . . . . . . . . . . . . . . . . . . . . . 2Rear connected configurations . . . . . . . . . . . . . . . 3Front connected configurations . . . . . . . . . . . . . . . 5Hybrid connected configurations . . . . . . . . . . . . . 10

Installation instructions for Series NRX Type NF frame fixed breaker rear connect, front connect, and hybrid configurations

Instructions apply to:

Series NRXT, Type NF frame (rear connect), ULT 489, UL 1066, IEC

Series NRX, Type NF frame (front connect) UL 489, IEC

Series NRX, Type NF frame (hybrid), UL 489, IEC

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Instruction Leaflet IL01301015EEffective November 2016

Installation instructions for Series NRX Type NF frame fixed breaker rear connect,

front connect, and hybrid configurations

EATON www.eaton.com

m WARNING(1) ONLY QUALIFIED ELECTRICAL PERSONNEL SHOULD BE PERMITTED TO WORK ON THE EQUIPMENT. (2) ALWAYS DE-ENERGIZE PRIMARY AND SECONDARY CIRCUITS IF A CIRCUIT BREAKER CANNOT BE REMOVED TO A SAFE WORK LOCATION. (3) DRAWOUT CIRCUIT BREAKERS SHOULD BE LEVERED (RACKED) OUT TO THE DISCONNECT POSITION. (4) ALL CIRCUIT BREAKERS SHOULD BE SWITCHED TO THE OFF POSITION AND MECHANISM SPRINGS DISCHARGED. FAILURE TO FOLLOW THESE STEPS FOR ALL PROCEDURES DESCRIBED IN THIS INSTRUCTION LEAFLET COULD RESULT IN DEATH, BODILY INJURY, OR PROPERTY DAMAGE.

m WARNINGTHE INSTRUCTIONS CONTAINED IN THIS IL AND ON PRODUCT LABELS HAVE TO BE FOLLOWED. OBSERVE THE FIVE SAFETY RULES: – DISCONNECTING – ENSURE THAT DEVICES CANNOT BE ACCIDENTALLY RESTARTED – VERIFY ISOLATION FROM THE SUPPLY – EARTHING AND SHORT-CIRCUITING – COVERING OR PROVIDING BARRIERS TO ADJACENT LIVE PARTS DISCONNECT THE EQUIPMENT FROM THE SUPPLY. USE ONLY AUTHORIZED SPARE PARTS IN THE REPAIR OF THE EQUIPMENT. THE SPECIFIED MAINTENANCE INTERVALS AS WELL AS THE INSTRUCTIONS FOR REPAIR AND EXCHANGE MUST BE STRICTLY ADHERED TO PREVENT INJURY TO PERSONNEL AND DAMAGE TO THE EQUIPMENT.

General informationSeries NRX fixed circuit breakers are available in rear connect (Figure 1) and front connect configurations (Figure 2) . The arc hood on a Series NRX fixed circuit breaker is positioned over the breaker’s arc chambers to primarily direct arc gas discharge (Figure 1 and Figure 2) . An arc hood is used on all fixed circuit breakers whether they are configured for rear or front connection . The front connect configuration also contains a shroud mounted on the load side of the breaker (Figure 2) .

Both breaker configurations can be surface mounted (Figure 1) or fixed mounted (Figure 2) . Mounting feet can be used to fix mount breakers to a vertical surface (Figure 2) . Refer to IL01301020E for mounting instructions .

Arc hood

Figure 1. Rear connect breaker

Arc hood

Holes for surface

mounting

Mounting feet for fixed

mounting

Shroud

Figure 2. Front connect breaker

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Rear connected configurations

m CAUTIONDO NOT EXCEED THE RECOMMENDED TORQUE VALUES WHEN MAKING BOLTED CONNECTIONS TO THE EQUIPMENT OR TO THE ADAPTERS THEMSELVES, ALL WHICH HAVE PRE-TAPPED HOLES. IN ADDITION, ANY CONNECTION HARDWARE USED SHOULD BE THE EXACT LENGTH REQUIRED AND SHOULD NOT EXTEND OUT PAST THE MOUNTING HOLE. FAILURE TO FOLLOW THESE REQUIREMENTS COULD RESULT IN EQUIPMENT DAMAGE AND/OR FAILURE.

m IMPORTANTIT IS RECOMMENDED THAT APPROPRIATE INTERPHASE BARRIERS BE INSTALLED BETWEEN INSIDE AND OUTSIDE PRIMARY TERMINALS WITH ALL REAR CONNECTED CONFIGURATIONS TO ENSURE INSULATION INTEGRITY. IF INTERPHASE BARRIERS ARE ORDERED FROM EATON, INSTALLATION INSTRUCTIONS ARE PROVIDED WITH THE BARRIERS.

Rear connect kit installation

This breaker configuration uses universal bus adapters that bolt to the rear primary terminal pads (Figure 3) . This type of adapter only supports bus connections .

ØD

LW

Dimensions in inches (mm) L = 2 .36 (59 .9) W = 1 .96 (49 .8) D = 0 .53 (13 .5)

Figure 3. Universal bus adapter

For a horizontal bus connection, bolt a universal bus adapter to the vertically positioned mounting holes of a rear primary terminal pad using the hardware provided (Figure 4) . For a vertical bus connection, bolt a universal bus adapter to the horizontally positioned mounting holes using the hardware provided .

Complete the other adapter connections in a similar fashion . The line and load adapters can be mounted in opposite orientations at the line and load sides (Figure 5) . Torque the bolted connections to 10 ft-lb (13 .6 N∙m) .

To remove the adapters, reverse the procedure described above .

Figure 4. Horizontal universal bus connection

Horizontal orientation

Vertical orientation

Figure 5. Universal bus adapters in opposite orientations

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Table 1. List of rear adapters

List number Connector

Catalog number

UL 489 UL 1066 IEC

42/50 kA 65 kA 42/50 kA 65 kA 42/50 kA 65 kA

1 Universal bus adapter—short SADP316SADP416

n n n n n n

2 Universal bus adapter—long LADP316LADP416

n n n n n n

3 Universal bus adapter—three hole, thick TADP316TADP416

n n Future Future n n

4 Rear connect adapter extensions—short (horizontal holes)

SBADPI316SBADPI416

Future Future Future Future n n

5 Rear connect adapter extensions—long (vertical holes)

LBADPU316LBADPU416

Future Future Future Future n n

Rear connect long adapter extension kit installation

This breaker configuration uses long copper adapter extensions that bolt to the rear primary terminal pads . The long adapter extension comes with vertical holes for making the required connections (Figure 6) .

Use the hardware provided in the kits and torque bolted connections to 10 ft-lb (13 .6 N∙m) .

Figure 6. Rear connect long adapter extension kit

Rear connect short adapter extension kit installation

This breaker configuration uses short copper adapter extensions that bolt to the rear primary terminal pads . The short adapter extension comes with horizontal holes for making the required connections (Figure 7) .

Use hardware provided in the kits and torque bolted connections to 10 ft-lb (13 .6 N∙m)

Figure 7. Rear connect short adapter extension kit

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Front connected configurations

m CAUTIONIT IS IMPORTANT NOT TO EXCEED THE RECOMMENDED TORQUE VALUES WHEN MAKING BOLTED CONNECTIONS TO THE EQUIPMENT OR TO THE ADAPTERS THEMSELVES, ALL WHICH HAVE PRE-TAPPED HOLES. FAILURE TO FOLLOW THESE REQUIREMENTS COULD RESULT IN EQUIPMENT DAMAGE AND/OR FAILURE.

This breaker configuration has bus adapters that are internal to the breaker and are intended to accommodate cable terminals and other external bus connections . These cannot be replaced in the field .

The arc hood on the line side and the shroud on the load side serve to insulate the bus adapters from their surroundings (Figure 8) . Refer to Table 2 for a list of available front connectors .

Arc hood

Shroud

Bus adapters

Figure 8. Bus adapters at the line and load sides—back cover not shown to highlight the bus adapters

Table 2. List of front connectors

List number Connector

Catalog number

UL 489 UL 1066 IEC

42/50 kA 65 kA 42/50 kA 65 kA 42/50 kA 65 kA

1 Bus conductor extension NRXBUSEXT n Future None None Future Future

2 Cable terminal (2 holes) with control wire provision

TA700NB1MTA700NB1MCWT

n n None None n n



n n None None n n



Future Future None None Future Future

Table 3. Cable terminal specifications

Maximum breaker amperes

Terminal body material Wire type

AWG wire range / number of conductors

Metric wire range mm2

Catalog number

Standard Cu/Al pressure terminals700 Aluminum Cu/Al 1–500 kcmil (2) 50–240 TA700NB1M

TA700NB1MCWT1000 Aluminum Cu/Al 3/0–400 kcmil (3) 95–185 TA1000NB1M

TA1000NB1MCWT1200 Aluminum Cu/Al 4/0–500 kcmil (4) 120–240 TA1200NB1M

TA1200NB1MCWT

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There are several connection configurations that can be used on the Series NRX front connect . The list of available connections is shown in Figure 9 . These connectors can be used in any combination at both the line and the load side as needed for the application .

Bus conductor extension

Cable terminal

Bus conductor extension with cable terminal

Figure 9. Fixed front connect connection options

Front connect kit installation

In order to attach cable terminals or bus conductor extensions to the line and load bus adapters, proceed with the following steps .

Step 1

Remove the four screws (or five screws for a four-pole breaker) while holding the front of the arc hood . Also remove the four screws (or five screws for a four-pole breaker) to remove the front of the shroud that is mounted on the load side (Figure 10) .

Remove screws

Remove screws

Figure 10. Step 1

Step 2

With the screws removed, pull out the front of the arc hood and set it aside (Figure 11) . Follow the same procedure to remove the front shroud at the load side .

Figure 11. Step 2

Step 3

Slide each of the baffles forward and out to provide proper access to the bus adapters (Figure 12) .

Baffle notches

Figure 12. Step 3

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Step 4

Remove four screws and lift up front cover . On the line side, remove the three screws on the secondary contact block assembly . Slide out secondary contact block shield . With the screws removed, pull out the secondary contact block assembly . On the load side, pull off the front terminal load shield (Figure 13) .

Terminal shield

Front terminal

load shield

Secondary contact block

assembly

Figure 13. Step 4

Step 5

Access is now available to make the required bus conductor extension or cable terminal connections . Access to the bottom adapters is also now available for bus or cable terminal connections (Figure 14) .

If using bus conductor extensions, start at Step 6. If using cable terminal connection, move to Step 7.

Figure 14. Step 5

Step 6

Bus conductor extension kit installation—catalog number NRXBUSEXT .

(E)

M12 lock washer

12x

(D)

M12 flat washer

12x

(H)

M8 flat washer

6x

(G)

M8 belleville washer

6x

(F)

M8 x 16 mm flathead screw

6x

(C)

M12 x 30 mm socket cap screw

12x

(B)

Bus conductor extension

6x

(A)

Phase barrier

2x

Figure 15. Bus conductor extension kit— catalog number NRXBUSEXT

1. Bolt the bus conductor extensions to the breaker bus adapters using the provided hardware . Torque the bolted connections to 30 ft-lb (40 .7 N∙m) .Make sure that the hardware used to make the connections does not extend out past the adapter surface . Check that the bolt goes all the way through the bus adapters .

2. Once the bolted connections are made, replace the baffles removed in Step 3 by sliding them back into position, making sure that the baffle notches are oriented toward the breaker . The bus extensions will fit through the space available between the baffles and the arc hood . Replace secondary block assembly shield .

3. Replace the secondary contact block assembly previously removed in Step 4 .

4. Replace front of the arc hood and the front of the shroud previously removed in Step 1 and Step 2 . Replace front cover .

5. Phase barriers made from flexible rubber material are supplied with the bus extension kit, along with the cable terminals . The phase barriers should be installed to the right and left of the center bus connector extension on both the line and the load sides . These phase barriers provide proper insulation integrity (Figure 16) .

m CAUTIONMAKE SURE THE PHASE BARRIERS FROM STEP 6.5 ARE PROPERLY INSTALLED BEFORE PLACING THE CIRCUIT BREAKER INTO SERVICE. FAILURE TO FOLLOW THESE REQUIREMENTS COULD RESULT IN EQUIPMENT DAMAGE AND/OR FAILURE.

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Phase barriers

Tapped holes

Bus conductor extensions

Figure 16. Step 6.5

If only using bus conductor extension kit, skip Step 7.

Cable terminal kit installation

otee:N Step 1 through Step 4 need to be completed before proceeding with Step 7 .

(I)

Cable terminal TA700NB1M (CWT)

(J)


(K)


(L)

M12 hex bolt

(M)

M12 lock washer

Figure 17. Cable terminal kit (CWT—control wire provision)

66B2638H01

NOTICE

Figure 18. Cable terminals torque requirements

Step 7

Cable terminal connections can be made directly to the bus adapters inside the breaker or to the bus conductor extensions that extend out of the line and load sides of the breaker (refer to Step 5) . Cable terminals are shown in Figure 19 and described in Table 3 .

To complete the connections, proceed with the following steps .

1. Bolt the cable terminals directly to the bus adapters using the hardware provided (Figure 19) . Cable terminals can also be bolted to the bus connector extensions (Figure 20) . Torque the bolted connections to 30 ft-lb (27 N∙m) .

otee:N Bus conductor extensions with cable terminals only available for 42/50 kA interruption ratings .

Figure 19. Step 7.1—Connecting cable terminals directly to bus adapters

Figure 20. Bus conductor extension with cable terminal (available for 42/50 kA interruption ratings)

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2. Install additional cable terminal connections as required (Figure 21) . Complete cable installation before proceeding with next step .

Figure 21. Step 7.2—Cable terminals connected directly to bus adapters

3. Replace the front of the arc hood and the shroud as previously removed in Step 1 and Step 2 . The baffles removed in Step 1 are no longer required in the arc hood if connecting cable terminals directly to the bus adapter . The newly mounted cable terminals will now perform the baffles’ function . However, if connecting the cable terminals to a bus conductor extension, re-install baffles before replacing the arc hood and shroud .

4. Phase barriers made from a flexible rubber material are supplied with the cable terminals . If using cable terminals connected to bus connecter extensions, phase barriers must be installed to the right and left of the center cable terminal on both the line and the load sides (to the right and left of the two center cable terminals for four-pole) (Figure 22) . These phase barriers provide proper insulation integrity .

Figure 22. Step 7.4—Cable terminals connected onto bus extensions on both line and load side

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As an option, customers can order a terminal shield to install at the line side of the front connect breaker (Figure 23) .

Figure 23. Terminal shield installed on a front connect breaker

5. When making the cable terminal connections, properly torque the cable retaining screws and periodically check all mounting hardware for proper torque loading . Refer to Figure 24 for rope lacing support instructions .To remove the cable terminals, reverse the procedure described above .

NYLON

6 INCHES(152 mm.)

ROPE

EXCEPTION: Not required when installed in Panelboardsor Switchboards using busbar connections.

Unsupported cables can cause minor personal injury orequipment damage under short circuit conditions.

Wrap breaker cables with 3/8 inch nylon or equivalent rope as shown in Figure having a minimum tensile strength of 2000 pounds at 6 inches from terminals and every additional 6 inches with five wraps or every additional 1 inch withone wrap.

CAUTION

66B2609H01

Figure 24. Rope lacing instructions

Hybrid connected configurationsThe hybrid breaker configuration family of rear-fixed adapters (Table 1) and front-fixed connectors (Table 2) may be used interchangeably on the line side or load side of the breaker . Figure 25 and Figure 26 show two of the most common configurations . For proper installation procedures, please refer to pages 3–9 of this manual or contact the Eaton production facility for further information .

Figure 25. Typical hybrid configuration 1 using connectors on the line side and adapters on the load side

Figure 26. Typical hybrid configuration 2 using adapters on the line side and connectors on the load side

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Disclaimer of warranties and limitation of liabilityThe information, recommendations, descriptions, and safety notations in this document are based on Eaton’s experience and judgment, and may not cover all contingencies . If further information is required, an Eaton sales office should be consulted .

Sale of the product shown in this literature is subject to the terms and conditions outlined in appropriate Eaton selling policies or other contractual agreement between Eaton and the purchaser .

THERE ARE NO UNDERSTANDINGS, AGREEMENTS, WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE OR MERCHANTABILITY, OTHER THAN THOSE SPECIFICALLY SET OUT IN ANY EXISTING CONTRACT BETWEEN THE PARTIES . ANY SUCH CONTRACT STATES THE ENTIRE OBLIGATION OF EATON . THE CONTENTS OF THIS DOCUMENT SHALL NOT BECOME PART OF OR MODIFY ANY CONTRACT BETWEEN THE PARTIES .

In no event will Eaton be responsible to the purchaser or user in contract, in tort (including negligence), strict liability or otherwise for any special, indirect, incidental or consequential damage or loss whatsoever, including but not limited to damage or loss of use of equipment, plant or power system, cost of capital, loss of power, additional expenses in the use of existing power facilities, or claims against the purchaser or user by its customers resulting from the use of the information, recommendations and description contained herein .

The information contained in this manual is subject to change without notice .

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© 2016 EatonAll Rights ReservedPrinted in USAPublication No . IL01301015E / Z18850Part Number: IL01301015EH08November 2016

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effective november 2016 supersedes july 2015 installation ... · effective november 2016...

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