Associated Protection Provided By The Customer - Siemens SINAMICS PERFECT HARMONY GH180 Operating Instructions Manual

7.8

Associated Protection provided by the Customer

To ensure adequate protection for VFDs, the associated protection (that is, the circuit breaker or
fused contactor) provided by the customer must fulfill the following requirements:
• The rated interrupting time of the associated protection shall not exceed 100 ms (duration
between trip to no-current state).
• A feedback signal must be provided from the associated protection to indicate the status -
• The associated protection must be connected as described in the section of this manual
entitled "Control Section".
• An overcurrent protection device must be provided to protect the VFD.
• When provided, the master mechanical interlock key (K1) must be coordinated with the
associated protection.
• This device is considered the main upstream isolating / disconnecting means for the
equipment and is subject to the local governing electrical codes (e.g., NEC, CEC, EU norms).
Type 6SR5 Air-Cooled
Operating Instructions, AK, A5E39390112
CLOSED or OPEN for VFDs with precharge.
7.8 Associated Protection provided by the Customer
Electrical Connections
49