Irig-B; Pulse Output; Control Schemes; Setpoint Group Control - GE 750 Instruction Manual
Feeder management relay
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750/760
Feeder Management Relay
Arcing Current
Analog Output
Channels
IRIG-B
Pulse Output
Setpoint Group Control
7–42
4.
Restore the open circuit and reset the relay.
5.
Close the breaker.
6.
Carefully disconnect a wire to open the trip circuit. Apply a momentary Trip
command to the relay. After a delay the element should generate an output (the
delay time can be checked in the Event Recorder)
7.
Restore the open circuit and reset the relay.
8.
Open and close the breaker a number of times to confirm the delay time
provides sufficient margin to allow for normal operation of the breaker.
This test requires equipment which is seldom readily available in the field. It is
suggested that as this feature does not require extreme levels of reliability and
security it is not necessary to be field-tested. A procedure is available upon request
from GE Multilin for those users wishing to perform this test. We suggest the
following procedure to confirm this element is operational.
The Indications and Operations for the Arcing Current are as outlined for Phase TOC
1 on page 7–18, except that this element has no Trip function.
1.
Check the value displayed under
for each phase. Set the Total Arcing Current Limit to a level just
ING CURRENT
above this value. Now perform a number of overcurrent element tests, with cur-
rent maintained after the Trip command, until this element generates an output.
2.
Be sure to reset the Total Arcing Current memory and setpoint at the end of this
test.
1.
Connect a milli-ammeter to channel output terminals as required.
2.
Follow the test procedures previously outlined for the channel parameter
observing the output on the milli-ammeter.
1.
Disconnect the IRIG-B input to the relay from the signal source.
2.
Under
S1 RELAY SETUP
values.
3.
Under
A1 STATUS
CLOCK
date and time.
4.
Set the
IRIG-B TIME SYNC
display the
IRIG-B FAILURE
5.
Connect the IRIG-B input from the signal source to the relay and check the
signal is available at the relay terminals.
6.
The
self-test warning should be removed from the display.
IRIG-B FAILURE
7.
Under
A1 STATUS
CLOCK
date and time.
1.
Inject quantity to be used to provide a pulse output.
2.
Observe that the pulses occur at the proper intervals by using the actual value
measurement provided by the relay. A counter or oscilloscope may also be used
to confirm pulse timing.
Control Schemes
Make the test connections specified in FIGURE 7–1: Relay Test Wiring – Wye
Connection or FIGURE 7–2: Relay Test Wiring – Delta Connection on page 7–4.
http://www.GEmultilin.com
A3 MAINTENANCE
manually set the relay date and time to incorrect
CLOCK
check that the relay has accepted the programmed
setpoint to the required signal type - the relay should
self-test warning.
check that the relay clock now displays the correct
Control Schemes
ARCING CURRENT
TOTAL ARC-
GE Multilin
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