Earth (Ground) Fault Detection At Start (Pr. 249) - Mitsubishi Electric FR-D720S SC EC Instruction Manual

Operation setting at alarm occurrence
6.12.3

Earth (ground) fault detection at start (Pr. 249)

You can choose whether to make earth (ground) fault detection at start valid or invalid. Earth
(Ground) fault detection is executed only right after the start signal is input to the inverter.
Protective function will not activate if an earth (ground) fault occurs during operation.
Pr.
Name
No.
Earth (ground) fault
249
detection at start
The above parameter can be set when Pr. 160 = 0.
NOTES As detection is executed at starting, output is delayed for approx. 20ms every starting.
If an earth (ground) fault is detected with "1" set in Pr. 249, output side earth (ground) fault
overcurrent (E.GF) is detected and the inverter trips. (Refer to page 7-13.)
If the motor capacity is smaller than the inverter capacity for the FR-D740-120SC or more,
earth (ground) fault detection may not be provided.
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Initial Setting
Description
Value Range
0 Without earth (ground) fault detection
1
1 With earth (ground) fault detection
Parameter
Refer to
Parameters referred to
Section
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