Lifting Circuit Breaker; Circuit Breaker Inspection - Eaton Magnum Air MWN-408 User Manual

Magnum
2.4

Lifting circuit breaker

DO NOT ATTEMPT TO LIFT CIRCUIT BREAKERS
WITH ORDINARY CRANE HOOKS, ROPES, CHAINS
OR OTHER SUCH DEVICES. FAILURE TO FOLLOW
THIS CAUTION COULD RESULT IN DAMAGE TO
VITAL PARTS SUCH AS ARC CHUTES, BARRIERS
AND WIRING OR THE ENTIRE CIRCUIT BREAKER.
To closely examine, install or just become more familiar
with the circuit breaker, carefully lift and place the circuit
breaker on a solid work surface capable of handling the
circuit breaker's weight (
Table 2-1) or on the captive drawout extension rails of the
breaker compartment. This is accomplished by using the
appropriate lifting yoke and lifter. The lifting yoke consists
of two steel hooks specially shaped to hook under the
integral molded lifting handles on both sides of the circuit
breaker (Figure 3-1). Every effort should be made during
lifting to minimize circuit breaker swing and tilt.
If the circuit breaker is to be lifted onto compartment
extension rails, follow the instructions in paragraph 2.7
entitled "Installing Drawout Circuit Breaker."
2.5

Circuit breaker inspection

All circuit breakers, once removed from their shipping
containers, should be visually inspected for any obvious
damage.
The current rating of the rating plug installed in the trip
unit should match the current rating of the sensors
mounted on the lower primary stabs of the circuit
breaker. Check to make sure that this match exists. The
rating plug rating can be viewed from the front of the
circuit breaker (Figure 3-4). The sensor rating can be
viewed through the viewing windows at the rear of the
circuit breaker (Figure 2-2). Sensors and rating plugs can
be easily changed as described in Section 6.
10
CAUTION
Table 2-1: Basic Circuit Breaker Weights
Breaker Weights (kg)
model Fixed
3P 4P
MWN-408 48
MWN-412
MWN-508 49
MWN-512
MWN-516
MWN-520
MWN-608 50
MWN-612
MWN-616
MWN-620
MWI-408 48
MWI-412 50
MWI-608
MWI-612
MWI-616
MWI-620 51
MWI-808
MWI-812
MWI-816
MWI-820
MWI-C08
MWI-C12
MWI-C16
MWI-C20
MWI-625 58
MWI-630
MWI-632
MWI-825
MWI-830
MWI-832
MWI-C25
MWI-C30
MWI-C32
MWK-232
MWI-641
MWI-841
MWI-C41
MWI-640, 64N 94
MWI-840, 84N
MWI-C40, C4N
MWI-E40, E4N
MWI-850, 85N 108
MWI-C50, C5N
MWI-E50, E5N
MWI-863, 86N
MWI-C63, C6N
MWIE63, E6N
Drawout Universal
cassette
3P 4P 3P
59 48 61 29
61 48 61 29
62 48 61 29
59 56 69 31
62 59 74 31
63 63 79 31
73 70 88 38
NOT YET AVAILABLE
118 116 148 49
137 131 167 63
1812.900A
4P
32
32
32
36
36
36
45
65
79