Manual WIP1 GB
Woodward
DOK-TD-WIP1 Rev.F
35
6.5.4 Reset mode for inverse time tripping characteristics for phase overcurrent el-
ement
>>>Reset-Modus<<
t_=_300s________
To ensure tripping, even with recurring fault pulses (packing faults) shorter than the set trip delay, the reset
mode for inverse time tripping characteristics can be switched over. For adjustment t = 60 s or 300 s, the
tripping time is maintained accordingly and only reset after 60 s or 300 s faultless condition. This function is
off if t is set to 0. With breaking fault current, the trip delay is reset immediately and started again at recur-
ring fault current.
6.5.5 Minimal time
This function is active with all inverse time tripping characteristics. It ensures that the trip delay is not faster
than the set value.
>>Minimal_time<<
>>tImin_=_0.1_s<
Note:
The minimum time cannot be set lower than the shortest trip delay of a tripping characteristic.
The latter depends on the multiplier of a tripping characteristic.
Example: selected characteristic x^4-time
Factor: 0.8
The lowest adjustable minimum time then amounts to 0.16 s. This value is automatically increased if the mul-
tiplier of the characteristic is increased.
6.5.6 Current setting for high set element
The pickup value for the high set element appearing on the display is related to the secondary C.T. current
given in ampere.
>>Schort_Circuit<
I>>__2.20_A_____
When this pickup value is set to infinity (on the display appears „EXIT“), the high set element of the relay is
blocked.
6.5.7 Trip delay for high set element
Irrespectively on the trip characteristic chosen for I>, the high set element I>> has always a definite time trip-
ping characteristic. The indication value is displayed as seconds.
>>Tripping_Time<
tI>>_=_0.35_s___
