Insulation Test - Siemens SIPLUS HCS Series Operating Instructions Manual

Commissioning

7.3 Insulation test

7.3 Insulation test
Because of the protective impedances in the device, the isolation resistance of a device of
each phase to ground with an open load is around 124 kΩ and around 70 kΩ with connected
heating loads. These values must be taken into account during the insulation test on the
system.
If there are several devices in one circuit, you must allow for the parallel connection of the
impedances. If necessary, you must remove the device from the circuit before
the insulation test.
Protective conductor current
Due to the protective impedances, the following protective conductor current flows under
normal operating conditions:
Voltage
400 V, 50 Hz
480 V, 60 Hz
82
Protective conductor current
<1.1 mA
<1.4 mA
Operating Instructions, 10/2019, A5E35452705A/005
SIPLUS HCS4300 PROFINET/PROFIBUS DP