Input Phase Loss Detection Level; Ground Fault Protection - Omron VARISPEED E7 User Manual

Input Phase Loss Detection Level

For the Input Phase Loss Detection the drive monitors the DC bus ripple. The drive integrates this ΔV value
over 10 scans (appr. 10 seconds). If the integrated ΔV value of any consecutive ten scan range is greater than
the voltage determined by multiplying L8-06 times the drives rated OV Trip point (400 VDC/800 VDC), a PF
fault will occur and the Drive will coast to stop.
Related Parameters
Parameter
Number
L8-06
*1. The factory setting depends on the Inverter capacity. The value for a 200 V class Inverter of 0.4 kW is given.

Ground Fault Protection

The ground fault protection function detects the earth leakage current by calculating the sum of the three out-
put currents. Normally this sum should be 0. If the sum exceeds 50% of the Inverter rated current a GF fault is
detected and the motor coasts to stop.
The ground fault protection can be disabled by setting L8-09 to 0. It is not recommended to disable the ground
fault protection.
Related Parameters
Parameter
Number
L8-09
6-48
Phase Loss Fault
Signal
DC Bus
Voltage
Fig 6.39 Input Phase Loss Detection
Name
Input Phase Loss Detection Level
Name
Ground fault protection selection
10 seconds
Setting
Range
0.0 to
25.0%
Setting
Range
0 or 1
L8-06
t
Change
Factory Access
during
Setting Level
Operation
*1
No A
5.0%
Change
Factory Access
during
Setting Level
Operation
1 No A