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2 CALCULATION OF SETTINGS
1814: DWELLTIME - Contact Dwell Time
DWELLTIME establishes the time that the closing contacts will stay closed following a reclose output. Select a
time suitable for the application. The dwell time can be set over a range of 0.1 to 2.0 seconds.
1815: HOLD: Inhibit Hold Select
HOLD can be set to YES or NO and determines whether the HOLD feature of the recloser will be employed.
1816 HOLDTIME - Inhibit Hold Time
If HOLD is set to YES, then HOLDTIME establishes the time that the recloser will wait for hold input as defined
by the HOLDSENSE (Setting 1817) to occur before sending the recloser to lockout. HOLDTIME has a setting
range of 1 to 1000 seconds.
1817 HOLDSENSE - Contact Input Status
HOLDSENSE can be set to:
•
CC - contact closed
•
CO - contact open
With HOLDSENSE set to CC, the recloser will wait for a contact closure at the inhibit input to stop the hold
timer (Protection Setting 1816: HOLDTIME) and allow the recloser to provide a close output to the breaker. If
no contact closure occurs during the hold time, then the recloser will go to lockout when the hold time expires.
In other words, the hold timer will be started only if there HOLD contact input is open, and will be stopped only
if the HOLD input contact closes before the hold time expires.
With HOLDSENSE set to CO, the recloser will wait for a contact opening at the HOLD input to stop the hold
timer (Protection Setting 1816: HOLDTIME) and allow the recloser to provide a close output to the breaker. If
no contact opening occurs during the hold time, then the recloser will go to lockout when the hold time expires.
In other words, the hold timer will be started only if HOLD contact input is closed, and will be stopped only if the
HOLD contact input opens before the hold time expires.
1818: SYNCCHECK - Synch Check Supervision Select
SYNCCHECK can be set to YES or NO and establishes if synchronism check is to be used during any of the
selected reclosures. The synchronism check function includes angle supervision, slip frequency supervision,
and voltage difference supervision, as well as bus and line voltage supervision.
1819: CLOSEANG - Closing Angle
CLOSEANG establishes the closing angle for which the synchronism check function will allow the recloser to
produce an output to close the breaker. The CLOSEANG setting has a range of 0 to 75°. Select an angle suit-
able to the application.
1820: SLIPFREQ - Slip Frequency
SLIPFREQ establishes the slip frequency for which the synchronism check function will allow the recloser to
produce an output to close the breaker (provided the closing angle requirement is met). The SLIPFREQ setting
has a range of 0.1 to 5.0 Hz. Select a slip frequency suitable to the application.
1821: BUSLINE - Bus or Line Voltage
BUSLINE can be set to BUS or LINE and identifies the source of the three phase voltage (bus or line) used to
supply the protective relay system. This allows the synchronism check function to ascertain which is bus
potential and which is line potential.
GE Power Management
LPS-D Line Protection System
2.3 PROTECTION SETTINGS
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