Table of Contents
Advertisement
CHAPTER 6: SETPOINTS
350 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL
DEAD BUS LEVEL
Range: 0.00 to 1.25 x VT in steps of 0.01 x VT
Default: 0.10 x VT
This setting specifies the voltage level considered as the dead Bus.
LIVE BUS LEVEL
Range: 0.03 to 1.25 x VT in steps of 0.01 x VT
Default: 0.50 x VT
This setting specifies the voltage level considered as the live Bus.
DEAD LINE LEVEL
Range: 0.00 to 1.25 x VT in steps of 0.01 x VT
Default: 0.10 x VT
This setting specifies the voltage level considered as the dead Line.
LIVE LINE LEVEL
Range: 0.03 to 1.25 x VT in steps of 0.01 x VT
Default: 0.50 x VT
This setting specifies the voltage level considered as the live Line.
MAX VOLT DIFF
Range: 10 to 10000 V in steps of 1 V
Default: 1000 V
This setting specifies the maximum difference between the line and busbar voltage to
allow the synchrocheck element to close.
MAX ANGLE DIFFERENCE
Range: 2 to 80 degrees in steps of 1
Default: 10 degrees
This setting specifies the maximum difference in angle between the line and busbar
voltage to allow the synchrocheck element to close.
MAX FREQ SLIP
Range: 0.05 to 5.00 Hz in steps of 0.01
Default: 0.05 Hz
This setting specifies the maximum difference in frequency (slip) between the line and
busbar voltage to allow the synchrocheck element to close.
BKR CLOSING TIME
Range: 0.00 to 1.00 s in steps of 0.01 s
Default: 0.10 s
This setting specifies the estimated breaker Closing and is used for establishing the
Closing order in a moment that allows the busbar and line voltages to be in phase.
DEAD SOURCE
Range: None, DL-DB (Dead Line-Dead Bus), LL-DB (Live Line-Dead Bus), DL-LB (Dead Line-
Live Bus), AL-DB (Any Line-Dead Bus), DL-AB (Dead Line-Any Bus), OL-OD (One Live-Other
Dead), NBL (Not Both Live)
Default: None
For each setpoint value in the Range, this setting enables the Closing permission signal
to be issued as follows:
–
Dead Line-Dead Bus: the Closing permission signal is issued for a dead line and
dead bus Condition (without voltage at both sides of the breaker).
–
Live Line-Dead Bus: the Closing permission signal is issued for a live line and dead
bus Condition (without voltage at the side of the breaker that correspond to the
busbar voltage).
S4 CONTROLS
6–147
Advertisement
Table of Contents
