JUMO 709050 IPC IGBT Power Converter IPC 200A Operating Manual - Manual (Page 26)

4 Electrical connection
26 IGBT Power Converter 200A [Patent No. EP1 126 591 B1] 02.08
4.1.2 Electrical isolation
The control section, including the inputs and outputs, as well as all operator
controls can be connected to SELV circuits.
The fault signal relay can be connected to SELV or supply potential, without
prejudicing the electrical isolation arrangements of the other inputs and
outputs.
4.1.3 Use of residual current protection devices
The converter is equipped with an internal input rectifier. A short to the housing
can result in a residual DC current that blocks the tripping of the conventional
residual current protection device. For this reason, any RCD used must be an
„all-current sensitive“ version of Type B.
When defining the trip current for the RCD, the leakage currents of the EMC
filter caused by the Y capacitors (<3mA) as well as the capacitive currents
from the cable shielding have to be taken into account.
A
There is no electrical isolation between the voltage supply of the
power section and the load.
Ensure that the metal housing of the oven or combustion chamber
is properly earthed.
v Chapter 3.2 „Filtering and interference suppression“ Installation
must comply with EMC requirements.
H
See also EN 50178 (VDE 0160):
Protection of electrical equipment through residual current
protection devices.