Negative Sequence Overvoltage Unit (47); Auxiliary Overvoltage Unit (59X); Auxiliary Undervoltage Unit (27X) - GE Multilin F650 Instruction Manual

5.4 PROTECTION ELEMENTS

5.4.8.4 NEGATIVE SEQUENCE OVERVOLTAGE UNIT (47)

47P unit is a negative sequence phase overvoltage protection element. It uses as input magnitude the negative sequence
component calculated from the phase voltage values. This unit can be used to detect the loss of one or two phases,
unbalance voltage conditions, etc.
Table 5–62: 47 UNIT SETPOINTS
SETPOINT > PROTECTION ELEMENTS > NEGATIVE SEQUENCE OV >
NEGATIVE SEQUENCE OV 1> NEGATIVE SEQUENCE OV 2 > NEGATIVE SEQUENCE OV 3
SETPOINT DESCRIPTION
Function permission
Pickup Level
Trip time
Reset time
Snapshot Event generation
The snapshot event setpoint enables or disables the snapshot event generation for this unit.

5.4.8.5 AUXILIARY OVERVOLTAGE UNIT (59X)

This is an auxiliary one-phase overvoltage unit for general use that uses as input magnitude the voltage measured by the
th
4 VT. This voltage can be measured from the busbar, the neutral, etc. (this being the reason for its generic name and use).
The time delay for unit 59X can be set from 0 to 900 seconds. The unit has a reset than can be programmed from 0 to 900
seconds.
5
Table 5–63: 59X UNIT SETPOINTS
SETPOINT > PROTECTION ELEMENTS > AUXILIARY OV >
AUXILIARY OV 1> AUXILIARY OV 2 > AUXILIARY OV 3
SETPOINT DESCRIPTION
Function permission
Pickup Level
Trip time
Reset time
Snapshot Event generation
The snapshot event setpoint enables or disables the snapshot event generation for this unit.

5.4.8.6 AUXILIARY UNDERVOLTAGE UNIT (27X)

This is an auxiliary one-phase undervoltage unit for general use that uses as input magnitude the voltage measured by the
th
4 VT, terminals A11-A12. This voltage can be measured from the busbar, the neutral, etc. (this being the reason for its
generic name and use).
Table 5–64: 27X UNIT SETPOINTS
Setpoint > Protection Elements > Auxiliary UV >
Auxiliary UV 1> Auxiliary UV 2 > Auxiliary UV 3
setpoint Description
Function permission
Pickup Level
Curve shape
Time Dial
Snapshot Event generation
The snapshot event setpoint enables or disables the snapshot event generation for this unit.
5-68
NAME DEFAULT
VALUE
Function DISABLED
Pickup Level 10
Trip Delay 10.00
Reset Delay 0.00
Snapshot Events ENABLED
NAME DEFAULT VALUE
Function DISABLED
Pickup Level 10
Trip Delay 10.00
Reset Delay 0.00
Snapshot Events ENABLED
Name Default Value
Function DISABLED
Pickup Level 10
Curve DEFINITE TIME
Delay 10.00
Snapshot Events ENABLED
F650 Digital Bay Controller
STEP RANGE
N/A [DISABLED – ENABLED]
1 V [3 : 300]
0.01 s [0.00 : 900.00]
0.01 s [0.00 : 900.00]
N/A [DISABLED – ENABLED]
STEP RANGE
N/A [DISABLED – ENABLED]
1 V [3 : 300]
0.01 s [0.00 : 900.00]
0.01 s [0.00 : 900.00]
N/A [DISABLED – ENABLED]
Step Range
N/A [DISABLED – ENABLED]
1 V [3 : 300]
N/A [DEFINITE TIME – INVERSE TIME]
0.01 s [0.00 : 900.00]
N/A [DISABLED – ENABLED]
5 SETPOINTS
GE Multilin