Removing the Drawout Circuit Breaker
Circuit Breaker Removal
| NOTICE |
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HAZARD OF EQUIPMENT DAMAGE
The chassis must be securely fastened when installing
or removing the device.
Failure to follow these instructions can result in equipment damage.
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Step |
Action |
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|---|---|---|
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1 |
With the circuit breaker in the disconnected position, discharge the closing spring by pressing the closing pushbutton. If the closing spring is charged, the circuit breaker closes. NOTE: For drawout circuit breakers fitted
with the optional DAE automatic
spring-discharge interlock, the closing spring is discharged
when the circuit breaker is moved from disconnected to withdrawn position.
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2 |
Press the opening pushbutton to open the circuit breaker. |
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3 |
Press and hold the rail release tabs towards the back. |
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4 |
Pull out the rails to the maximum by pulling on the drawout grips. Result: The circuit breaker is supported on the rails, clear of the chassis and ready to be lifted. |
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Lifting the Circuit Breaker
Both the circuit breaker and chassis have a carrying grip for lifting. To lift the circuit breaker, use an overhead lifting device attached to the carrying grip, following the directions given in this section.
 DANGER |
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HAZARD OF DEVICE FALLING
Failure to follow these instructions will result in death or serious injury.
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Lift the circuit breaker from the chassis rails by using the carrying grip located on the sides of the circuit breaker.
Circuit Breaker Weights
The following table shows the weights of the different circuit breakers available.
|
Number of poles |
Circuit breaker |
MTZ2 |
MTZ3 |
|---|---|---|---|
|
3P |
Moving part (Drawout) |
50 kg |
120 kg |
|
Chassis |
40 kg |
105 kg |
|
|
Fixed circuit breaker |
50 kg |
120 kg |
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|
4P |
Moving part (Drawout) |
65 kg |
160 kg |
|
Chassis |
55 kg |
140 kg |
|
|
Fixed circuit breaker |
65 kg |
160 kg |