5-68 F650 Digital Bay Controller GE Multilin
5.4 PROTECTION ELEMENTS 5 SETPOINTS
5
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 5â62: 47 UNIT SETPOINTS
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
4
th
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.
Table 5â63: 59X UNIT SETPOINTS
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
4
th
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 5â64: 27X UNIT SETPOINTS
The snapshot event setpoint enables or disables the snapshot event generation for this unit.
SETPOINT > PROTECTION ELEMENTS > NEGATIVE SEQUENCE OV >
NEGATIVE SEQUENCE OV 1> NEGATIVE SEQUENCE OV 2 > NEGATIVE SEQUENCE OV 3
SETPOINT DESCRIPTION NAME DEFAULT
VALUE
STEP RANGE
Function permission Function DISABLED N/A [DISABLED â ENABLED]
Pickup Level Pickup Level 10 1 V [3 : 300]
Trip time Trip Delay 10.00 0.01 s [0.00 : 900.00]
Reset time Reset Delay 0.00 0.01 s [0.00 : 900.00]
Snapshot Event generation Snapshot Events ENABLED N/A [DISABLED â ENABLED]
SETPOINT > PROTECTION ELEMENTS > AUXILIARY OV >
AUXILIARY OV 1> AUXILIARY OV 2 > AUXILIARY OV 3
SETPOINT DESCRIPTION NAME DEFAULT VALUE STEP RANGE
Function permission Function DISABLED N/A [DISABLED â ENABLED]
Pickup Level Pickup Level 10 1 V [3 : 300]
Trip time Trip Delay 10.00 0.01 s [0.00 : 900.00]
Reset time Reset Delay 0.00 0.01 s [0.00 : 900.00]
Snapshot Event generation Snapshot Events ENABLED N/A [DISABLED â ENABLED]
Setpoint > Protection Elements > Auxiliary UV >
Auxiliary UV 1> Auxiliary UV 2 > Auxiliary UV 3
setpoint Description Name Default Value Step Range
Function permission Function DISABLED N/A [DISABLED â ENABLED]
Pickup Level Pickup Level 10 1 V [3 : 300]
Curve shape Curve DEFINITE TIME N/A [DEFINITE TIME â INVERSE TIME]
Time Dial Delay 10.00 0.01 s [0.00 : 900.00]
Snapshot Event generation Snapshot Events ENABLED N/A [DISABLED â ENABLED]