Special
equipment
Insulation
monitoring
34
Version: April 2016
1.
Plug in the device and switch on.
The signal lamp
(see Figure 5-1-(3))
and the position of the
circuit breaker indicate the result:
Symbol
Result
Significance
lights up red
Circuit breaker jumps to Pos. 0 and the
generator cuts out
Insulation fault (≤ 23 kΩ)
lights up red
Circuit breaker stays in Pos.1
Insulation fault (≤ 34.5 kΩ)
stays off
Circuit breaker stays in Pos. 1 and the
generator continues to run
Connected unit is OK
Table 5.2: Insulation monitoring whilst running without switching off
If an insulation fault exists and the unit was previously
OK when tested without a device connected (see above),
the insulation fault has been caused by the device.
2.
After the device has been switched off and unplugged,
the circuit breaker must be returned to Pos. 1, and the
generator must be restarted, in order for the device to be
operated again.
Insulation monitoring
(disconnecting) whilst
running:
