Eaton Series NRX - General Information

2
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
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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