Eaton Series NRX Installation Instructions Manual

Brand: Eaton

Model: Series NRX

Type: Installation Instructions Manual

Eaton Series NRX circuit breakers offer reliable protection for your electrical systems. With a range of configurations, including rear connect, front connect, and hybrid options, these breakers can be tailored to your specific needs. The universal bus adapters and copper adapter extensions provide flexibility for various connection options. The arc hood and shroud enhance safety by directing arc gas discharge and insulating the bus adapters. These breakers are suitable for both surface and fixed mounting, making them a versatile choice for your electrical installations.

Instruction Leaet IL01301015E

Effective November 2016

Supersedes July 2015

Contents

Description Page

General information ........................2

Rear connected configurations ...............3

Front connected configurations ...............5

Hybrid 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

Instruction Leaet IL01301015E

Effective November 2016

Installation instructions for Series NRX

Type NF frame xed breaker rear connect,

front connect, and hybrid congurations

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 WARNING

THE 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 information

Series 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

Instruction Leaet IL01301015E

Effective November 2016

Installation instructions for Series NRX

Type NF frame xed breaker rear connect,

front connect, and hybrid congurations

EATON www.eaton.com

Rear connected congurations

m CAUTION

DO 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 IMPORTANT

IT 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

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

Instruction Leaet IL01301015E

Effective November 2016

Installation instructions for Series NRX

Type NF frame xed breaker rear connect,

front connect, and hybrid congurations

EATON www.eaton.com

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 SADP316

SADP416

n n n n n n

2 Universal bus adapter—long LADP316

LADP416

n n n n n n

3 Universal bus adapter—three hole, thick TADP316

TADP416

n n

Future Future

n n

4 Rear connect adapter extensions—short

(horizontal holes)

SBADPI316

SBADPI416

Future Future Future Future

n n

5 Rear connect adapter extensions—long

(vertical holes)

LBADPU316

LBADPU416

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

Instruction Leaet IL01301015E

Effective November 2016

Installation instructions for Series NRX

Type NF frame xed breaker rear connect,

front connect, and hybrid congurations

EATON www.eaton.com

Front connected congurations

m CAUTION

IT 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

Future None None Future Future

2 Cable terminal (2 holes)

with control wire provision

TA700NB1M

TA700NB1MCWT

n n

None None

n n

3 Cable terminal (3 holes)

with control wire provision

TA1000NB1M

TA1000NB1MCWT

n n

None None

n n

4 Cable terminal (4 holes)

with control wire provision

TA1200NB1M

TA1200NB1MCWT

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 mm

Catalog

number

Standard Cu/Al pressure terminals

700 Aluminum Cu/Al 1–500 kcmil (2) 50–240 TA700NB1M

TA700NB1MCWT

1000 Aluminum Cu/Al 3/0–400 kcmil (3) 95–185 TA1000NB1M

TA1000NB1MCWT

1200 Aluminum Cu/Al 4/0–500 kcmil (4) 120–240 TA1200NB1M

TA1200NB1MCWT

Instruction Leaet IL01301015E

Effective November 2016

Installation instructions for Series NRX

Type NF frame xed breaker rear connect,

front connect, and hybrid congurations

EATON www.eaton.com

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

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

Instruction Leaet IL01301015E

Effective November 2016

Installation instructions for Series NRX

Type NF frame xed breaker rear connect,

front connect, and hybrid congurations

EATON www.eaton.com

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

(G)

M8 belleville

washer

(F)

M8 x 16 mm

flathead screw

(C)

M12 x 30 mm

socket cap screw

12x

(B)

Bus conductor

extension

(A)

Phase

barrier

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 CAUTION

MAKE 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.

Instruction Leaet IL01301015E

Effective November 2016

Installation instructions for Series NRX

Type NF frame xed breaker rear connect,

front connect, and hybrid congurations

EATON www.eaton.com

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

ote:N Step 1 through Step 4 need to be completed before proceeding

with Step 7.

(I)

Cable terminal

TA700NB1M (CWT)

(J)

Cable terminal

TA1000NB1M (CWT)

(K)

Cable terminal

TA1200NB1M (CWT)

(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).

ote: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)

Instruction Leaet IL01301015E

Effective November 2016

Installation instructions for Series NRX

Type NF frame xed breaker rear connect,

front connect, and hybrid congurations

EATON www.eaton.com

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

Instruction Leaet IL01301015E

Effective November 2016

Installation instructions for Series NRX

Type NF frame xed breaker rear connect,

front connect, and hybrid congurations

EATON www.eaton.com

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 Panelboards

or Switchboards using

busbar connections.

Unsupported cables can cause

minor personal injury or

equipment 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 with

one wrap.

CAUTION

66B2609H01

Figure 24. Rope lacing instructions

Hybrid connected congurations

The 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

Instruction Leaet IL01301015E

Effective November 2016

Installation instructions for Series NRX

Type NF frame xed breaker rear connect,

front connect, and hybrid congurations

EATON www.eaton.com

Disclaimer of warranties and limitation

of liability

The 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.

Eaton

1000 Eaton Boulevard

Cleveland, OH 44122

United States

Eaton.com

Printed in USA

Publication No. IL01301015E / Z18850

Part Number: IL01301015EH08

November 2016

Eaton is a registered trademark.

All other trademarks are property

of their respective owners.

Installation instructions for Series NRX

Type NF frame xed breaker rear connect,

front connect, and hybrid congurations

Instruction Leaet IL01301015E

Effective November 2016

Eaton Series NRX Installation Instructions Manual

Eaton Series NRX Installation Instructions Manual

Eaton Series NRX Installation Instructions Manual

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