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1 PRODUCT DESCRIPTION
1.10 RECLOSER (OPTIONAL)
b) THREE POLE TRIP ENABLE
1
This output is enabled whenever a reclose cycle is started and maintained until the recloser resets. If the
recloser goes to lockout following an unsuccessful reclose cycle, then the three-pole trip enable output is main-
tained. If the recloser goes to lockout for any other reason, the three-pole trip enable output is set at that time.
The three-pole trip enable output is maintained as long as the recloser stays in the lockout mode.
The three-pole trip enable output is also produced when RECLTYPE = 3POLE or when the recloser is turned
off (Protection Setting 1801: RECLMODE = OFF).
This output is internally routed to the LPS-D and is used to ensure that three-pole tripping will be initiated for all
faults (regardless of fault type) as long as the three-pole trip enable output is maintained. If the recloser is used
externally with another relay system, then the NOT of the three-pole trip enable output must be programmed
(as shown in Figure 1–21: THREE POLE TRIP ENABLE OUTPUT) to drive a form "b" contact, so that the con-
tact will be closed whenever the three-pole trip enable output is produced, and will otherwise remain open.
Lockout
O R
RECLMODE = OFF
RECLTYPE = 3POLE
Three- pole Trip
Enable
Figure 1–21: THREE POLE TRIP ENABLE OUTPUT
A form "b" contact is required so that it will close and remain closed during the time that the recloser is in lock-
out, when three-pole tripping is required. Similarly, the contact will also be closed when the recloser is turned
OFF or if power is lost to the recloser, both situations in which three-pole tripping is also required.
c) RECLOSE IN PROGRESS (RIP)
This output is produced whenever a reclosing cycle is started and it will reset when the recloser goes to reset if
reclosing is successful, or to lockout if reclosing is unsuccessful.
d) LOCKOUT
This output will be produced whenever the recloser is in the lockout state.
1.10.6 SYNCHRONISM CHECK (OPTIONAL)
An optional synchronism check function is available for use with the recloser function. The function provides
synchronism check and/or voltage supervision of any or all three-pole reclosures. Protection Setting 1818:
SYNCCHECK (range: YES or NO) establishes whether the synchronism check function is to be used.
The synchronism check function requires voltage inputs from both the BUS and LINE side of the circuit
breaker. The LPS-D relay requires three phase potential for proper operation of its protective functions; this
three phase voltage may be supplied from either the bus or the line. In addition to this three phase potential,
the synchronism check function requires a single phase voltage from the other side of the breaker. This single
phase voltage may be VA, VB, VC, VAB, VBC or VCA.
Protection Setting 1821: BUSLINE (range: BUS, LINE) tells the recloser where the three-phase voltage used
by the relay system is located, bus or line. Protection Setting 1822: SYNCPHASE (range: VA, VB, VC, VAB,
VBC, VCA) establishes which phase or phase pair is used to make the angle and voltage check measure-
ments.
GE Power Management
LPS-D Line Protection System
1-
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