GE P444

P
44x/EN ST/Hb6
Setting
(ST) 4
-32 MiCOM P40 Agile
P442, P444
Menu text Default setting
Setting range
Step size
Min Max
characteristic.
Thermal Alarm 70% 50% 100% 1%
An alarm can be raised on reaching a thermal state corresponding to a percentage of the
trip threshold. A typical setting might be ‘Thermal Trip’ = 70% of thermal capacity.
Time Constant 1 10 mn 1 mn 200 mn 1 mn
Setting for the thermal time constant (τ
1) for a single time constant characteristic, or the first
time constant for the dual time constant characteristic.
Time Constant 2 5 mn 1 mn 200 mn 1 mn
Setting for the second time constant (τ2) for the dual time constant characteristic.
2.11 Residual overvoltage (neutral displacement) protection (“Residual overvoltage”
menu)
Menu text Default setting
Setting range
Step size
Min Max
GROUP 1 – RESIDUAL OVER-VOLTAGE
VN Type Residual Residual, Homopolar
Select residual or homopolar voltage.
VN>1 Function DT Disabled, DT, IDMT
Select the residual overvoltage stage 1 as either Inverse Definite Minimum Time (IDMT),
Definite Time (DT) or disabled. The following submenus are visible according to this setting.
VN>1 Voltage Set
residual:
homopolar (C7.x):
5 V
1.5 V
1 V
0.5 V
80 V or 180V
∗
60 V
1 V
0.5 V
Pick-up setting for the first stage residual overvoltage characteristic.
VN>1 Time Delay 5.00 s 0 s 100.0 s 0.01 s
Operating time delay setting for the first stage definite time residual overvoltage element.
VN>1 TMS 1.0 0.5 100.0 0.5
Setting for the Time Multiplier Setting to adjust the operating time of the IDMT characteristic.
where K = Time Multiplier Setting (TMS), K = Operating time (in second) and M
= measured
voltage / relay setting voltage (V<).
VN>1 tReset 0 s 0 s 100.0 s 0.5 s
Setting to determine the reset/release definite time for the first stage characteristic.
VN>2 Status Disabled Enabled, Disabled
Setting to enable or disable the second stage definite time residual overvoltage element.
VN>2 Voltage Set
residual:
homopolar (C7.x):
10 V
3 V
1 V
0.5 V
80 V or 180V
∗
60 V
1 V
0.5 V
Pick-up setting for the second stage residual overvoltage element.
VN>2 Time Delay 10.00 s 0 s 100.0 s 0.01 s
Operating time delay setting for the second stage residual overvoltage element.