Effective July 2019 - Eaton NRX Series Instruction Leaflet

Instruction Leaflet IL019238EN

Effective July 2019

(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.
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.
Only workers with electrical training and familiarity with power
circuit breakers and their associated hazards should perform work on
a Series NRX circuit breaker. Workers should also become familiar
with the specifics associated with Series NRX circuit breakers as
presented in this document. Be sure to follow all safety guidelines
and wear proper personal protective equipment when performing
maintenance on a circuit breaker.
POWER AND ENERGY METERING MAY OR MAY NOT BE SLIGHTLY
DEGRADED VIA A FIELD CONVERSION. PROTECTION FUNCTIONS WILL
NOT BE AFFECTED.
THIS INSTRUCTION LEAFLET DOES NOT EXPLAIN HOW TO GO FROM A
LOWER CURRENT TO A LARGER CURRENT. THIS PROCEDURE IS ONLY
RELATED TO TRIP UNIT REPLACEMENT OR UPGRADES. CONTACT EATON
FOR CURRENT RATING RELATED CHANGES.
2 EATON www.eaton.com
WARNING
WARNING
NOTICE
NOTICE
Series NRX breaker PXR trip unit
Unless otherwise specified in this guide, inspection, preventative
maintenance, and testing must always be performed on equipment
that is in an electrically safe working condition (as defined in
Article 120 of NFPA 70E-2018) and at a distance beyond the arc
flash boundary of energized electrical conductors. Verify that there
is no voltage present on incoming terminals (or on control power
terminals, if present) and between these terminals and ground to
positively ascertain that the equipment is totally in an electrically
safe working condition. The disconnecting or isolating means on the
line side of the isolation devices being checked or tested should
be in the open state to assure that the equipment will remain in
an electrically safe working condition during these procedures by
exercising approved Lock-Out-Tag-Out procedures. Refer to the
Hazardous Energy Control procedures as described in OSHA and
NFPA 70C-1974, Article 120.2 (D) for clarification.
Tools/materials required
Slotted/flathead screwdriver
•
Phillips-head screwdriver
•
Needle nose pliers or wire harness removal tool
•
Kit parts identification
Inspect the kit upon receipt to verify all of the kit components
are available for the fieldwork:
(A) PXR 20 or PXR 25 trip unit
(B) Instruction leaflet (this document)
(C) Tools required for installation (see above)
(D) PXR 25 Max Wiring Harness (only for PXR 25 upgrades)
(E) Instruction leaflet MN013003EN
field installation instructions