Commissioning
Safety Instructions
Commissioning Instructions
Follow these instructions before the electrification of the line.
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Step |
Action |
|---|---|
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1 |
Insulate the cast resin busbar trunking system from the connections to transformers, switches, meters, and so on. |
|
2 |
Check that all connections are fully tightened. Follow the instructions relating to tightening torques (visual inspection with record of results). |
|
3 |
Check all suspensions and supports. All the fixing studs and screws of the supports must be tightened. |
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4 |
Make sure that all tap-off units and tapping equipment are disconnected (Off position). |
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5 |
Carry out an insulation resistance test to make sure that there are no short circuits or earth failures in the system (phase-earth, phase-neutral, and phase-phase). NOTE: You will observe that the readings vary depending on the
length of the run, the number, and size of conductors and the level
of moisture in the atmosphere.
|
|
6 |
Record the measured values in an insulation test report. |
|
7 |
Contact technical support if the readings are lower than 1 MΩ per 100 m (1 MΩ x 100/length of the run in meters). NOTE: As a rule, you must comply
with the relevant country-specific regulations (in Germany and Switzerland,
the minimum value is 0.5 MΩ).
|
Electrifying the Line
Follow these rules to electrify the line:
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There must be no electrical load in the cast resin busbar trunking system when it is being electrified for the first time. Check the entire system to ensure that none of the electrical loads connected to the system are switched on.
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You must electrify the line step by step, starting at the power supply and moving towards the loads. The principal elements must be electrified first, followed by the feed equipment and finally, the secondary element circuits.
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After the line has been electrified, equipment such as lights, contactors, heaters, and motors can be switched on.
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Faults caused by short circuits must trigger the protective device for the feeder unit in the manner prescribed by the official regulations. Ensure that the system is de-energized before you eliminate the cause of the fault.
Observe the five safety rules:
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Disconnect from the mains.
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Ensure that the system is de-energized.
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Secure against re-connection.
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Carry out earthing and short circuiting.
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Provide protection from adjacent live parts.