10
Section 2: Receiving, unpacking, and inspection
Series NRX with PXR - type RF low voltage power (air) circuit breakers instruction manual
MN013002ENH03 September 2016 www.eaton.com
Figure 10. Step 3.
Step 5:
Carefully place a breaker or cassette on a solid
work surface capable of handling their weight for examina-
tion (Table 1). A drawout circuit breaker can also be exam-
ined while withdrawn on the drawout extension rails of an
already installed cassette. Fixed circuit breakers already
installed in an assembly can be inspected in their installed
location.
CAUTION
Do not attempt to lift a breaker or cassette with ordinary
crane hooks or chains. Damage to vital circuit breaker parts
could result. Use two appropriate lifting straps when using
any type of lifting device.
CAUTION
Make certain that the cassette is properly mounted or
seated securely on a work table before attempting to have
the breaker fully extended on the cassette’s drawout rails.
Failure to comply could result in the cassette tipping for-
ward resulting in equipment damage and/or bodily injury.
Table 1. Approximate weights.
Item
Lbs
Kg
Drawout breaker, three-pole
145
66
Drawout breaker, four-pole
180
82
Fixed breaker, three-pole
120
55
Fixed breaker, four-pole
155
71
Drawout cassette, three-pole
66
30
Drawout cassette, four-pole
78
35
Lifting
handle
Lifting
area
Circuit breaker inspection
All circuit breakers, once removed from their shipping con-
tainers, should be visually inspected for any obvious dam-
age. Check to make sure that the installed trip unit and
nameplate information match the equipment as ordered. All
circuit breakers should be operated as described in Section
3 prior to being put into service.
Storing circuit breaker
Store a circuit breaker in its original shipping container with
contacts open and springs discharged. Keep it in a clean
dry place. Ensure there is ample air circulation and heat, if
necessary, to prevent condensation.
IMPORTANT
A circuit breaker stored for any length of time should be
operated a minimum of five times before it is placed in ser-
vice.
CAUTION
Do not store equipment on its back. This could result in
equipment damage.
Figure 11.
!
(Circuit breaker)
(Breaker in drawout
cassette)
