Frequency Protection ("Freq Protection" Menu); Underfrequency Protection - GE MiCOM P40 Agile Technical Manual

P44x/EN ST/Hb6
(ST) 4-36
Menu text
GROUP 1 – VOLT PROTECTION
V>3 Measur't Mode
This setting is to select the measurement mode Phase-Phase or Phase-Neutral for stage 3
of the Overvoltage Protection.
V>4 Measur't Mode
This setting is to select the measurement mode Phase-Phase or Phase-Neutral for stage 4
of the Overvoltage Protection.
2.14

Frequency protection ("Freq protection" menu)

The frequency protection menu contains underfrequency and overfrequency protections,
individually activated when the corresponding status is activated.
2.14.1

Underfrequency protection

Menu text
GROUP 1 – FREQ PROTECTION
UNDERFREQUENCY
F<1 Status
Setting to enable or disable the first underfrequency element. The F<1 threshold setting and
time-delay (following submenus) are settable when F<1 status is enabled.
F<1 Setting
Setting that determines the pick-up threshold for the first stage underfrequency element.
F<1 Time delay
Setting that determines the minimum operating time-delay for the first stage underfrequency
element.
F<2 Status
Setting to enable or disable the second underfrequency threshold (same setting as stage 1).
F<2 Setting
F<2 Time delay
F<3 Status
Setting to enable or disable the 3
F<3 Setting
F<3 Time delay
F<4 Status
Setting to enable or disable the 4
F<4 Setting
F<4 Time delay
Default setting
Phase-Neutral Phase-phase, Phase-neutral
Phase-Neutral Phase-phase, Phase-neutral
Default setting
Disabled Disabled / Enabled
49.5Hz 45Hz
4s 0s
Disabled Disabled / Enabled
49Hz 45Hz
3s 0s
Disabled Disabled / Enabled
rd
underfrequency threshold (same setting as stage 1).
48.5Hz 45Hz
2s 0s
Disabled Disabled / Enabled
th
underfrequency threshold (same setting as stage 1).
48Hz 45Hz
1s 0s
MiCOM P40 Agile P442, P444
Setting range
Min Max
Setting range
Min Max
65Hz
100s
65Hz
100s
65Hz
100s
65Hz
100s
Setting
Step size
Step size
0.01Hz
0.01s
0.01Hz
0.01s
0.01Hz
0.01s
0.01Hz
0.01s