GE Multilin 889, Instruction Manual

Page: 236 / 580

4–106 889 GENERATOR PROTECTION SYSTEM – INSTRUCTION MANUAL
OUTPUTS CHAPTER 4: SETPOINTS
Figure 4-31: Relay 1 “TRIP” logic diagram
892826A2.cdr
T
rip request
Breaker Open
(from Breaker Detection
)
At least one
contact programmed
(from Breaker Detection
)
AND
OR
TRIP
T
rip without
configured
breaker contact
OR
AND
AND
AND
TRIP
Operate Output Relay
1
“TRIP”
OR
Relay
(
Ready
=
1
)
LED
:
TRIP
AND
OR
T
rip when at least
one breaker
contact configured
OR
SEAL
-I
N
TIME
SETPOINT
2
sec
This timer starts on the falling edge
of a pulse
,
and issues a positive
pulse upon time expiry
t
RESET
(command
)
Relay
(
Ready
=
1
)
OR
BLOCK
SETTING
Of
f
=
0
100
ms
TRIP
(
from
Any Element set to “T
rip”
)
BKR
1
Local Open
OPEN
(
from
T
ransfer Scheme
)
This timer starts on the falling edge of
a pulse
,
and issues a positive pulse
upon time expiry
Upon dropout of the trip signal and no breaker open status detected
,
this timer
will start on the raising edge of a pulse issued from either of the two timers
,
and
will produce positive pulse upon time expiry
.
When breaker open status is detected
,
and no trip is present
,
the output relay
will stay reset.
AND
TYPE
SETPOINT
Pulsed Self
-Reset
RESET
(command
)
For
850
only
Latched
Relay
(
Ready
=
1
)
OPERA
TE
SETTING
FL
Operand
,
O
ff
=
0
For
850
,
869
,
and
889
only
Element operation with selection of
Aux
Relay programmed for BKR tripping
For
845
only
For
850
,
869
,
and
889
(one breaker
)
Operate the selected
Aux Relay programmed
for BKR trip
For
845
,
and
889
(two breakers
)
Relay
(
Ready
=
1
)
Aux Relay X ON FLEXLOGIC OPERAND
Relay
1
Note: Relay 1 (T
rip) is programmed by the manufacturer
for breaker tripping on 850, 869, and 889 (single breaker option) relays.
Additional output relays can be selected
to operate from the menu of each element.
OR
BKR
1
Remotel Open
BKR
1
Manual Open
FLEXLOGIC OPERAND