Zero sequence voltage Uo
Earth fault
Resistor’s connection
Switch-on
delay
Switch-on
time
Transient
earth fault
time
t
Repeat time
Repeat delay
X number cycle repeats
Drop delay in
standby state
= ON
Figure 86: Flow chart for inversed resistor function (standby state ON)
Zero sequence voltage Uo
Earth fault
Resistor’s connection
Switch-on
delay
Switch-on
time
Transient
earth fault
time
t
Repeat time
Repeat delay
X number cycle repeats
Drop delay in
standby state
= ON
Figure 87: Flow chart for inversed resistor function (standby state ON) and active transient
suppression
0 Drop delay standby state ON
. This done very unbalanced grids.
Selection options:
Value Description
OFF: The resistor OFF the grid's normal state
ON The resistor the grid's normal state
This function used grids which the resistor used dampen the grid its normal
non-faulty state.Page 120 Detailed description REG-DP/ REG-DPA parameters
We take care it
