Overfrequency Protection; Circuit Breaker Fail Protection (Cbf) ("Cb Fail & I<" Menu) - GE MiCOM P40 Agile Technical Manual

Setting
MiCOM P40 Agile P442, P444
2.14.2

Overfrequency protection

Menu text
GROUP 1 – FREQ PROTECTION
OVERFREQUENCY
F>1 Status
Setting to enable or disable the first overfrequency 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 overfrequency element.
F>1 Time delay
Setting that determines the minimum operating time-delay for the first stage overfrequency
element.
F>2 Status
Setting to enable or disable the second overfrequency threshold (same setting as stage 1).
F>2 Setting
F>2 Time delay
2.15
Circuit breaker fail protection (CBF) ("CB Fail & I<" menu)
Menu text
GROUP 1 – CB FAIL & I<
BREAKER FAIL
CB Fail 1 Status
Setting to enable or disable the first stage of the circuit breaker function.
CB Fail 1 Timer
Setting for the circuit breaker fail timer stage 1, during which breaker opening must be
detected.
CB Fail 2 Status
Setting to enable or disable the second stage of the circuit breaker function.
CB Fail 2 Timer
Setting for the circuit breaker fail timer stage 2, during which breaker opening must be
detected.
CBF Non I Reset
Setting which determines the elements that will reset the circuit breaker fail time for
undercurrent protection function initiated circuit breaker fail conditions.
Default setting
Disabled Disabled / Enabled
50.5Hz 45Hz
2s 0s
Disabled Disabled / Enabled
51Hz 45Hz
1s 0s
Default setting
Enabled Enabled, Disabled
0.2 s 0 s
Disabled Enabled, Disabled
0.4 s 0 s
CB Open & I< I< Only, CB Open & I<, Prot Reset & I<,
Prot Reset or I<, Disable
P44x/EN ST/Hb6
Setting range
Min Max
65Hz
100s
65Hz
100s
Setting range
Min Max
10 s
10 s
(ST) 4-37
Step size
0.01Hz
0.01s
0.01Hz
0.01s
Step size
0.01 s
0.01 s