Eaton Series NRX User manual

Series NRX PT module installation and
operation instructions
• 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.
• 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 SWITCHBOARD.
Instructions apply to:
UL1066/ANSI, UL489 series NRX NF frame
IEC IZMX16
Effective July 2016
Supersedes February 2012 Series NRXInstruction Leaet IL01301074E
UL489 series NRX RF frame
IEC IZMX40

2
Series NRX PT module installation and
operation instructions
EATON www.eaton.com
Instruction Leaet IL01301074E
Effective July 2016
ote:N The content of this IL applies to both PXR and Digitrip equipped breakers.
Appearance of product may vary.
Section 1. Description
The Potential Transformer (PT) module is a device used to supply a
three phase voltage signal to series NRX NF-frame or RF-frame circuit
breakers equipped with Digitrip 1150 or PXR programmable trip units.
Specifications:
The output of the module is directly proportional to the input voltage
according to the ratio given below (Table 1).
Table 1. Voltage ratios.
INPUT OUTPUT (NORMAL)
208V L-L 1.95V L-N
240V L-L 2.25V L-N
415V L-L 3.89V L-N
440V L-L 4.13V L-N
480V L-L 4.50V L-N
600V L-L 5.63V L-N
690V L-L 6.47V L-N
• Maximum rated input voltage: 690 volts line to line
• Burden: 1 VA per phase
• Output voltage accuracy: +/-2% of normal
Figure 1.
5.716 (145.19)
4.406 (111.91)
FACE OF DIN RAIL
.755 (19.18)
2.896 (73.56)
.755 (19.18)
Dimensions of PT module.
• WARNING
DO NOT ATTEMPT TO INSTALL OR PERFORM MAINTENANCE ON EQUIPMENT
WHILE IT IS ENERGIZED. DEATH OR SEVERE PERSONAL INJURY CAN
RESULT FROM CONTACT WITH ENERGIZED EQUIPMENT. ALWAYS VERIFY
THAT NO VOLTAGE IS PRESENT BEFORE PROCEEDING. ALWAYS FOLLOW
SAFETY PROCEDURES. EATON IS NOT LIABLE FOR THE MISAPPLICATION OR
MISINSTALLATION OF ITS PRODUCTS.
• WARNING
OBSERVE ALL RECOMMENDATIONS, NOTES, CAUTIONS, AND WARNINGS
RELATING TO THE SAFETY OF PERSONNEL AND EQUIPMENT. OBSERVE
AND COMPLY WITH ALL GENERAL AND LOCAL HEALTH AND SAFETY LAWS,
CODES, AND PROCEDURES.
ote:N The recommendations and information contained herein are based on
experience and judgment, but should not be considered to be all-inclusive or to
cover every application or circumstance that may arise.

3
Instruction Leaet IL01301074E
Effective July 2016
Series NRX PT module installation and
operation instructions
EATON www.eaton.com
Section 2. Installation
The series NRX PT module is to be mounted on a standard 35mm EN
DIN rail and connects to the breaker as shown. Figures 2 and 3 show
a 3-pole, 3-wire configuration. Figures 4 through 7 show connections
for a 3-pole breaker and a 4-pole breaker with an external neutral
sensor.
Figure 2.
LA
LB
LC
PT
MODULE
BREAKER
A
0-690 L-L INPUT
BC
To additional
breakers
Secondary
contacts
{
135
31 VB
30 VA
32 VC
TP2
14
Series NRX breakers with Digitrip 1150 trip units - 3-pole,
3-wire.
Figure 3.
LA
LB
LC
PT
MODULE
BREAKER
A
0-690 L-L INPUT
BC
To additional
breakers
Secondary
contacts
{
135
30 VB
29 VA
31 VC
TP2
32
Series NRX breakers with PXR trip units - 3-pole, 3-wire.
Figure 4.
LA
LB
LC
PT
MODULE
BREAKER
ABC
To additional
breakers
Secondary
contacts
1
N
3 5
31 VB
30 VA
32 VC
TP2
14 VN
LN
Neutral
sensor
Series NRX breakers with Digitrip 1150 trip unit - 3-pole,
4-wire.
Figure 5.
LA
LB
LC
PT
MODULE
BREAKER
ABC
To additional
breakers
Secondary
contacts
1
N
3 5
30 VB
29 VA
31 VC
TP2
32 VN
LN
Neutral
sensor
Series NRX breakers with PXR trip units - 3-pole, 4- wire.
0-690 L-L INPUT
0-690 L-L INPUT

4
Series NRX PT module installation and
operation instructions
EATON www.eaton.com
Instruction Leaet IL01301074E
Effective July 2016
Figure 6.
LA
LB
LC
PT
MODULE
BREAKER
A
0-690 L-L INPUT
BC
To additional
breakers
Secondary
contacts
1
N
35
31 VB
30 VA
32 VC
TP2
14 VN
LN
Series NRX breakers with Digitrip 1150 trip units - 4-pole,
4-wire.
Figure 7.
LA
LB
LC
PT
MODULE
BREAKER
A
0-690 L-L INPUT
BC
To additional
breakers
Secondary
contacts
1
N
35
30 VB
29 VA
31 VC
TP2
32 VN
LN
Series NRX breakers with PXR trip units - 4-pole, 4-wire.
The PT module secondary may connect up to 16 Series NRX breakers
using 18 AWG wire for each phase in a daisy-chain configuration and
may extend to the furthest breaker in the the chain, to a maximum of
250 feet (Figure 8).
Figure 8. Daisy chain breaker connection of up to 16 breakers.
250 ft (76.2 m) max.

5
Instruction Leaet IL01301074E
Effective July 2016
Series NRX PT module installation and
operation instructions
EATON www.eaton.com
Section 3. Operation
Switches are provided to disconnect each phase from the mains
(Figure 9). All three switches must be in the off (“O”) position before
performing dielectric testing of a system where the PT module is
connected. When the test is complete, all switches must be in the on
(“I”) position for the module to function as intended.
• CAUTION
DIELECTRIC TESTING OF A SYSTEM CONTAINING A PT MODULE WITH THE
PHASE CONNECTED WILL DAMAGE THE PT MODULE. DISCONNECT ALL
OF THE PHASES FROM THE MAINS (BY SELECTING “0”) BEFORE TESTING.
AFTER TESTING, RETURN ALL PHASE SWITCHES TO THE “I” POSITION.
Figure 9. Line phase switches.
:
Line phase switches

6
Series NRX PT module installation and
operation instructions
EATON www.eaton.com
Instruction Leaet IL01301074E
Effective July 2016
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Eaton
Electrical Group
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United States
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© 2016 Eaton
All Rights Reserved
Printed in USA
Publication No. IL01301074E TBG01271
Part Number: IL01301074EH02
July 2016
Disclaimer of warranties and limitation of liability
The information, recommendations, descriptions, and safety
notations in this document are based on Eaton Corporation’s
(“Eaton”) 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 descriptions contained
herein.
The information contained in this manual is subject to change
without notice.