Commissioning; Checking The Insulation Resistance - Siemens MOTOX BA 2320 Operating Instructions Manual

La / lg motors

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Commissioning

5.1

Work on power installations must only be carried out by specialists.

Lock-out the drive unit to prevent it from being started up unintentionally

Attach a warning notice to the start switch.

All covers which are designed to prevent active / live or rotating parts from being touched,

or which are necessary to ensure correct cooling, must be installed prior to commissioning

During the measurement, and immediately afterwards, in some cases the terminals are at

hazardous voltage levels and they must not be touched

Carry out a check on the power cables connected to ensure that no voltage can be applied.

NOTICE

The insulation resistance needs to be checked prior to commissioning and again after any

extended periods of storage or periods during which the equipment is not in operation

Before measuring the insulation resistance, read the manual for the insulation resistance

meter you are going to use. Disconnect any main circuit cables already connected from the

terminals before measuring the insulation resistance.

NOTICE

If the critical insulation resistance is less than or equal to this value, the windings must be

dried or, if the rotor is removed, cleaned thoroughly and dried

Note that the insulation resistance of dried, clean windings is lower than that of warm

windings. The insulation resistance can only be properly assessed after conversion to the

reference temperature of +25 °C.

If the measured value is close to the critical value, you must subsequently check the

insulation resistance at appropriately frequent intervals.

BA 2320

Operating Instructions, 02/2015, 70000004023775

WARNING

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