Placing The Relay In Service; Description - GE 750 Instruction Manual

Placing the Relay In Service

Description

GE Multilin
3. In Reclosure Shot 1 settings, select the
it brings the pickup level just above the actual current that is being injected.
Turn on the current. The relay should trip and reclose once. The Shot in Effect
display should show 1 and the Pickup LED off. Once the
expired, the relay will then pickup, trip, and reclose until lockout as the fault
current is still present. Turn off the current, reset the relay and close the
breaker.
4. Return
PHASE TIME OC 1 RAISED PICKUP
level that is above the actual current for Reclosure Shot 2. Turn on the current.
Reclosure Shot 2 should not operate, and the Pickup LED will be off. Turn off the
current and reset the relay.
5. Repeat Step 4 using Phase Time OC 1 Blocking for each of the 4 Reclosure Shot
settings.
6. Repeat Steps 1 through 5 for each
time overcurrent element before moving on to the next.
The following procedure tests the Select Setpoint Group function for Autoreclose:
1. Keep the
MAX NUMBER OF RECLOSURE SHOTS
to "Trip + AR". In Setpoint Group 2, set
TIME OC 1 FUNCTION
to "Trip + AR". In Setpoint Group 3, set
TION
AR". In Setpoint Group 4, set
same pickup level for each element.
2. For Reclosure Shot 1 settings, set the
2". Similarly, set it to "Group 3" for Reclosure Shot 2, "Group 4" for Reclosure
Shot 3, and "Group 1" for Reclosure Shot 4.
3. Set the test set to a current level above the pickup of these elements. With the
current source off, Reset the relay, and clear the event recorder.
4. Turn on the current. The relay will Trip and Autoreclose four times due to the
following elements, in order: Phase TOC 1, Phase TOC 2, Phase IOC 1, Phase
IOC 2, Phase TOC 1. The event recorder will show this sequence of events. Turn
off the current, and reset the relay.
Placing the Relay In Service
The procedure outlined in this section is explicitly confined to the
operation of the relay, and does not include the operation of any
equipment external to the relay.
NOTE
1. Cycle through the relay setpoints and set each setpoint in each group to the
required value.
2. Save all the relay setpoints to a file (or print them) for a final inspection to
confirm that all setpoints are correct.
3. Set the relay clock (date and time) if IRIG-B is not used or unavailable.
4. Clear all historical values stored in the relay. Under subheading
, set
CLEAR DATA CLEAR ENERGY USE DATA
to "Yes". Under subheading
RECORDER DATA
set
RESET TRIP COUNTER DATA
5. Turn off all test voltages, and the power supply to the relay. Remove all test
wiring connections, and restore to normal any panel wiring disturbed for
testing.
6. Perform a complete visual inspection to confirm that the relay is ready to be
placed in service. Energize the relay power supply circuit and check that the
Relay In Service LED is on, and that the Self-Test Warning LED is off,
establishing that the relay is operating normally.
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Feeder Management Relay
PHASE TIME OC 1 RAISED PICKUP
to "0" for Reclosure Shot 1, and set it to a
TIME OC RAISED PICKUP
at 4. In Setpoint Group 1, set
PHASE INST OC 1 FUNCTION
to "Trip + AR". Select the
PHASE INST OC 2 FUNCTION
SELECT SETPOINT GROUP
,
CLEAR MAX DMND DATA
S1 RELAY SETUP
and
RESET ARCING CURRENT DATA
750/760
such that
has
AR RESET TIME
setpoint, disabling each
PHASE
PHASE TIME OC 2 FUNC-
to "Trip +
setpoint to "Group
S1 RELAY SETUP
, and
CLEAR EVENT
, also
INSTALLATION
to "Yes".
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