Magnum
10
1812.900A
2.4
Lifting circuit breaker
CAUTION
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.
Table 2-1: Basic Circuit Breaker Weights
Weights (kg)
Fixed
Drawout
Universal
cassette
Breaker
model
3P
4P
3P
4P
3P
4P
MWN-408
MWN-412
48 59 48 61 29
32
MWN-508
MWN-512
MWN-516
MWN-520
49 61 48 61 29
32
MWN-608
MWN-612
MWN-616
MWN-620
50 62 48 61 29
32
MWI-408
48 59 56 69 31
36
MWI-412
MWI-608
MWI-612
MWI-616
50 62 59 74 31
36
MWI-620
MWI-808
MWI-812
MWI-816
MWI-820
MWI-C08
MWI-C12
MWI-C16
MWI-C20
51 63 63 79 31
36
MWI-625
MWI-630
MWI-632
MWI-825
MWI-830
MWI-832
MWI-C25
MWI-C30
MWI-C32
MWK-232
58 73 70 88 38
45
MWI-641
MWI-841
MWI-C41
NOT YET AVAILABLE
MWI-640, 64N
MWI-840, 84N
MWI-C40, C4N
MWI-E40, E4N
94 118 116 148 49 65
MWI-850, 85N
MWI-C50, C5N
MWI-E50, E5N
MWI-863, 86N
MWI-C63, C6N
MWIE63, E6N
108 137 131 167 63 79
