Undervoltage Elements (27P, 27X); Element - GE F650 Instruction Manual

10.14 UNDERVOLTAGE ELEMENTS (27P, 27X)

10.14UNDERVOLTAGE ELEMENTS (27P, 27X)
Set the relay to trip for the protection element being tested. Configure any of the outputs to be activated only by the
protection element being tested.
Set the relay as follows:
Apply voltage as indicated on the table over the undervoltage setting level and verify that the relay does not trip.
Decrease voltage level gradually and verify that the relay trips for the set voltage (with an admissible error of 5%).

ELEMENT

27P
Set the relay to trip for the protection element being tested. Configure any of the outputs to be activated only by the
protection element being tested.
Set the relay as follows
Apply voltage as indicated on the table over the undervoltage setting level and verify that the relay does not trip.
Decrease voltage level gradually and verify that the relay trips for the set voltage (with an admissible error of 5%).
ELEMENT
10
27X
10-20
PHASE UV (27P)
Function
Mode
Pickup Level
Curve
Delay
Minimum Voltage
Logic
Supervised by 52
PHASE CURVE PICKUP
LEVEL
VI DEFINITE 50 V
TIME
GENERAL SETTINGS
Auxiliary Voltage
AUXILIARY UV (27X)
Function
Pickup Level
Curve
Delay
INPUT CURVE PICKUP
LEVEL
VX DEFINITE 50 V
TIME
F650 Digital Bay Controller
ENABLED
PHASE-GROUND
50 V
DEFINITE TIME
2.00 sec
30 V
ANY PHASE
DISABLED
DELAY APPLIED TRIPPING TIMES (S)
VOLTAGE
EXPECTED
2 55 V NO TRIP
45 V 2.000 sec
VX
ENABLED
50 V
DEFINITE TIME
2.00 sec
DELAY APPLIED TRIPPING TIME (S)
VOLTAGE
EXPECTED
2 55 V NO TRIP
45 V 2.000 sec
10 COMMISSIONING
10.14.1 27P ELEMENT
ADMISSIBLE
NA
[2.000 – 2.100]
10.14.2 27X ELEMENT
ADMISSIBLE
NA
[2.000 – 2.100]
GEK-106310AB