4.3.7
Operation with residual current protective device (RCD)
WARNING
Fire or electric shock due to unsuitable residual-current protective devices
The converter may create a current through the protective conductor. The current through the
protective conductor can cause the residual current device (RCD) or residual current monitor
(RCM) to incorrectly trip (nuisance trip). In the case of a ground fault, the fault current can
contain a DC component, which prevents the RCD or RCM from tripping, with the risk of
subsequent fire or electric shock.
• Use the protection and monitoring devices recommended in the documentation.
Protection and monitoring equipment
To provide protection against short-circuit, use the overcurrent devices listed in Technical data
(fuses, circuit breakers etc.).
If the earth fault loop impedance of the line supply at the infeed point is too high to ensure that
the overcurrent protective device disconnects within the stipulated time in the case of insulation
failure (ground fault, fault to frame), then you must use additional residual current protective
devices RCD, type B.
In order that an RCD does not unnecessarily trip as a result of operational leakage currents, the
following preconditions must be fulfilled:
• The neutral point of the line supply is grounded.
• Use a Siemens SIQUENCE RCCB (series 5SV364.-4), type B, short-time delayed [K] with a
rated residual current of 300 mA.
• Connect the RCCB in series with the overcurrent protective devices.
• A dedicated RCD is used for every converter.
Connecting the motor holding brake
The Motor Holding Brake (MHB) function of the Control Units comprise dedicated hardware and
software to control the actions of the MHB on the motor which is connected to the converter.
The MHB is connected to the converter using the EMB- and EMB+ terminals of the mains
connectors in the Control Unit housing. The Power Module must be removed to access these
terminals.
The converter supplies 180 V DC (at 400 VAC mains voltage) to the motor holding brake.
Installation
4.3 Electrical Installation
Distributed converter for SIMOGEAR geared motors
78
Operating Instructions, 10/2020, FW V4.7 SP13, A5E31298649B AL