Effective December 2010
Supersedes October 2010
IL01301037EH04
Instructional Leaflet
IL01301037E
Installation/removal instructions
for Series NRX fixed and drawout
secondary terminal blocks
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.
Section 1: General information
A maximum of 27 terminal blocks providing 54 secondary
contact points are available in one cradle on the NF Frame
circuit breaker. The RF Frame circuit breaker is available with
a maximum of 46 terminal blocks providing 92 secondary
contact points in two individual cradles. The number of termi-
nal blocks mounted depends on a number of considerations,
such as whether the circuit breaker is electrically or manually
operated and how many features are required. For example,
the shunt trip device has two leads and uses a single termi-
nal block. Other devices, such as a motor operator, has three
leads and requires two terminal blocks. Each connection point
is permanently identified. Terminal blocks can be individually
mounted and hence contact positions may be empty.
For drawout circuit breakers, secondary terminal blocks are
DIN rail mounted on the top front portion of the drawout cas-
sette. A cross connector can be used to tie adjacent contacts
together for drawout configurations (
Figure 1
).
Figure 1. Drawout Terminal Block
Instructions apply to:
1600 NRX SUB-TITLE IMAGE (12/15/2010)
Series NRX, Type NF Frame
ANSI, UL1066, UL489/IEC, IZMX16, IZM91
Series NRX, Type RF Frame
IEC, IZMX40
4000 NRX RF DRAWOUT SUBTITLE IMAGE (12/15/2010)
