GE MiCOM P40 Agile Technical Manual page 109

Setting
MiCOM P40 Agile P442, P444
Menu text
GROUP 1 – VOLT PROTECTION
OVERVOLTAGE
V> Measur't Mode
Select the overvoltage protection to operate from a phase to phase voltage, phase to earth
measurement or Independent.
V> % Hysteresis
Reset Ratio of all Overvoltage Stages.
V>1 Function
Select the first overvoltage threshold as either Inverse Definite Minimum Time (IDMT),
Definite Time (DT) or disabled (see setting guidelines, section 2.4). The three following
submenus (Voltage, time delay and time multiplier setting) are visible according to this
setting.
V>1 Voltage Set
Sets the pick-up setting for first stage overvoltage element.
V>1 Time Delay
Setting for the operating time-delay for the first stage definite time overvoltage element.
V>1 TMS
The following formula defines the IDMT characteristics: t = K / (M – 1),
where K = Time Multiplier Setting (TMS), K = Operating time (in second) and M = measured
voltage / relay setting voltage (V>).
V>2 Status
Enable or disable the second overvoltage threshold. The voltage and time-delay (following
submenus) are settable when V>2 status is enabled. Stage 2 is DT only.
V>2 Voltage Set
V>2 Time Delay
V>3 Status
Enable or disable 3
submenus) are settable when V>3 status is enabled. Stage 3 is DT only.
V>3 Voltage Set
V>3 Time Delay
V>4 Status
Enable or disable 4
submenus) are settable when V>4 status is enabled. Stage 4 is DT only.
V>4 Voltage Set
V>4 Time Delay
V>1 Measur't Mode
This setting is to select the measurement mode Phase-Phase or Phase-Neutral for stage 1
of the Overvoltage Protection.
V>2 Measur't Mode
This setting is to select the measurement mode Phase-Phase or Phase-Neutral for stage 2
of the Overvoltage Protection.
Default setting
Phase-Neutral
2
DT
75V
10s
1
Enabled
90V
0.5s
Enabled
rd
overvoltage threshold. The voltage and time-delay (following
100V
1s
Enabled
th
overvoltage threshold. The voltage and time-delay (following
105V
1s
Phase-Neutral
Phase-Neutral
Setting range
Min Max
Phase-phase, Phase-neutral, Independent
0.1 2
Disabled, DT, IDMT
60V 185V
0s 100s
05 100
Disabled, Enabled
60V 185V
0s 100s
Disabled, Enabled
60V 185V
0s 100s
Disabled, Enabled
60V 185V
0s 100s
Phase-phase, Phase-neutral
Phase-phase, Phase-neutral
P44x/EN ST/Hb6
(ST) 4-35
Step size
1
1V
0.01s
0.5
1V
0.01s
1V
0.01s
1V
0.01s