Virtual Inputs 15 To 20; Output Relays; Metering; Current Metering - GE 750 Instruction Manual

Metering

Virtual Inputs 15 to 20

Output Relays

Current Metering

GE Multilin
d) User Input A Function Set to "Trip"
The procedure to test this element is identical to that outlined for User Input A
Function setpoint set to Alarm, with the following exceptions. The Trip Relay and
LED will activate along with the Auxiliary Relay and LED. At the end of each test, a
reset must be performed in order to clear the trip diagnostic message and Trip LED.
Follow the Virtual On and Virtual Off Input Asserted Logic procedures outlined for
Logic/Virtual Inputs 1 to 14 in the previous section.
1. Enter the following settings under the
ing:
FORCE OUTPUT RELAYS FUNCTION
: "De-energized"
FORCE 1 TRIP RELAY
: "De-energized"
FORCE 2 CLOSE RELAY
: "De-energized"
FORCE 3 AUXILIARY RELAY
: "De-energized"
FORCE 4 AUXILIARY RELAY
: "De-energized"
FORCE 5 AUXILIARY RELAY
: "De-energized"
FORCE 6 AUXILIARY RELAY
: "De-energized"
FORCE 7 AUXILIARY RELAY
: "De-energized"
FORCE 8 SELF-TEST RELAY
FORCE SOLID STATE OUTPUT
2. Using a multimeter, check that all output relays are de-energized (i.e. N.O.
contacts open, N.C. contacts closed).
3. Make the following setting change:
: "Energized".
RELAY
4. Check that the Trip output is energized (i.e. N.O. contacts closed), and the Trip
LED is illuminated.
5. Make the following setting change:
: "De-energized".
RELAY
6. Repeat Steps 3 through 5 for Output Relays 2 through 8 inclusive.
7. Observing polarity, connect a minimum 5 V DC source in series with a limiting
resistor that will permit a minimum current of 100 mA, in series with the Solid
State output. Observing polarity, connect a DC voltmeter across the limiting
resistor. Check there is no voltage displayed on the voltmeter.
8. Change setting to:
S8 TESTING
"Energized".
9. Check that a voltage has appeared on the voltmeter. Turn off the source and
disconnect the test wiring.
10. Change setting to:
S8 TESTING
energized".
11. Change setting to:
S8 TESTING
"Disabled".
Metering
a) Phase Current Inputs
For these tests, refer to the figures on page 7–4 for test connections. The expected
accuracy is as follows:
For 1 A CTs: ±0.01 A for 0.01 to 1.99 A; ±0.2 A for 2.00 to 20.00 A
For 5 A CTs: ±0.05 A for 0.05 to 9.99 A; ±1.0 A for 10.00 to 100.00 A
Use the following procedure to test Phase and Neutral Current Inputs:
http://www.GEmultilin.com
S8 TESTING
: "Enabled"
: "De-energized"
S8 TESTING OUTPUT RELAYS
S8 TESTING OUTPUT RELAYS
OUTPUT RELAYS
OUTPUT RELAYS FORCE SOLID STATE OUTPUT
OUTPUT RELAYS FORCE OUTPUT RELAYS FUNCTION
750/760
Feeder Management Relay
subhead-
OUTPUT RELAYS
FORCE 1 TRIP
FORCE 1 TRIP
:
FORCE SOLID STATE OUTPUT
: "De-
:
7–11