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Chapter 3 Paramters/Functions Innovation Series Medium Voltage GP Type - G Drives GEH-6385
Protective Functions

Custom User Faults

Each Innovation Series product provides the capability to configure two fault
circuits. The trip faults Customer use NC flt and Customer use NO flt trigger on input
signals that are the stat es of the fault circuits. Customer use NC flt occurs when th e
normally closed circu it is open. Customer use NO flt occurs when the normally open
circuit is closed.
Function inputs
The following table specifies the input parameters of the Custom User Faults
function.
Parameter Description
User NC fault sel Selects the source of the normally closed circuit input.
User NO fault sel Selects the source of the normally open circuit input.
Faults and alarms
The following table sp ecifies the faults and alarms decl ared by the Custom User
Faults function.
Fault/Alarm Description
Customer u se NC flt Tr ip fault that oc curs when the norm ally closed circ uit
input is False, indicating that the circuit is open
Customer us e NO flt Tri p fault the occurs when the normall y open circuit in put
is True, indicating that the circuit is closed
Function description
The parameters User NC fault sel and User NO fault sel generally select digital
inputs (variables Di gital input 1, …, Digital input 6) or general purpose LAN
requests (variables GP lan req b it 1, …, GP lan req bit 8) . The cust om user fa ults
may be disabled by selecting Unused for the input parameters.

DC Link Protection

The drive con tains several di agnostic and prot ective featur es involving the DC Link
Protection.
Diagnostic variables
The following table sp ecifies the DC Link Protection diagnostic variables.
Variable Description
DC bus feedback Unfiltered DC link voltage. DC volts
DC bus voltage Filtered DC link voltage. DC volts
DC bus charged Indicates whether the DC link voltage is high enough to
allow the dri ve to run.
DC bus excursion Departure of DC link from user specified region. DC volts