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Questions

  • No : 21394
  • Release Date : 2018/08/22 16:27
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Output side earth (ground) fault overcurrent protection

I have questions concerning the output side earth (ground) fault overcurrent protective function for the following five types:
FR-A520, FR-A024, FR-E520, FR-A540, FR-A044 When leakage occurs on the output side,
1. How much is the sensitivity current?
2. Can I set the sensitivity current using the parameter unit?
3. Does the inverter stop?
Category : 

Answer

1. How much is the sensitivity current?
When the sum of the three-phase output current of the inverter reaches approximately 70% of the inverter rated current, it is assumed that earth (ground) fault overcurrent occurred.
2. Can I set the sensitivity current using the parameter unit?
No.
3. Does the inverter stop?
The inverter trips with E.GF.
It can be E.OC1 to E.OC3 depending on the ground fault current.

The FR-A500 series, FR-A044, and FR-E540 constantly detect a ground fault.
The FR-A024 does not provide ground fault protection.
The FR-E520 provides ground fault protection upon startup.
It does not provide ground fault protection after startup. Note that ground fault protection upon startup is initially disabled and you must enable it by setting the corresponding parameter.
Product Name
Inverter, magnet motor drive
Product Category
Inverter
Series
FR-A024, FR-E500, FR-A500
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