Digital Inputs And Trip Coil Supervision; Analog Inputs And Outputs - GE 489 Instruction Manual

7 TESTING
The digital inputs and trip coil supervision can be verified easily with a simple switch or pushbutton. Verify the SWITCH
+24 V DC with a voltmeter. Perform the steps below to verify functionality of the digital inputs.
1. Open switches of all of the digital inputs and the trip coil supervision circuit.
2. View the status of the digital inputs and trip coil supervision in:
A1 STATUS DIGITAL INPUTS
3. Close switches of all of the digital inputs and the trip coil supervision circuit.
4. View the status of the digital inputs and trip coil supervision in:
A1 STATUS DIGITAL INPUTS
INPUT EXPECTED STATUS
ACCESS
BREAKER STATUS
ASSIGNABLE INPUT 1
ASSIGNABLE INPUT 2
ASSIGNABLE INPUT 3
ASSIGNABLE INPUT 4
ASSIGNABLE INPUT 5
ASSIGNABLE INPUT 6
ASSIGNABLE INPUT 7
TRIP COIL SUPERVISION
The specification for analog input and analog output accuracy is ±1% of full scale. Perform the steps below to verify accu-
racy. Verify the Analog Input +24 V DC with a voltmeter.
4 to 20 mA INPUTS:
1. Alter the following setpoints:
S11 ANALOG I/O ANALOG INPUT1
S11 ANALOG I/O ANALOG INPUT1
S11 ANALOG I/O ANALOG INPUT1
2. Analog output values should be ±0.2 mA on the ammeter. Measured analog input values should be ±10 units. Force
the analog outputs using the following setpoints:
S12 TESTING TEST ANALOG OUTPUT
S12 TESTING TEST ANALOG OUTPUT
3. Verify the ammeter readings and the measured analog input readings. For the purposes of testing, the analog input is
fed in from the analog output (see Figure 7–1: Secondary Current Injection Testing). View the measured values in:
A2 METERING DATA ANALOG INPUTS
ANALOG EXPECTED
OUTPUT AMMETER
FORCE READING
VALUE
0% 4 mA
25% 8 mA
50% 12 mA
75% 16 mA
100% 20 mA
GE Multilin
PASS
(SWITCH OPEN) FAIL
Open
Open
Open
Open
Open
Open
Open
Open
Open
No Coil
"4-20 mA"
ANALOG INPUT1:
ANALOG INPUT1 MINIMUM:
ANALOG INPUT1 MAXIMUM:
FORCE ANALOG OUTPUTS FUNCTION:
ANALOG OUTPUT 1 FORCED VALUE:
MEASURED AMMETER READING
(MA)
1 2 3
489 Generator Management Relay
7.2 HARDWARE FUNCTIONAL TESTS

7.2.7 DIGITAL INPUTS AND TRIP COIL SUPERVISION

EXPECTED STATUS PASS
(SWITCH CLOSED) FAIL
Shorted
Shorted
Shorted
Shorted
Shorted
Shorted
Shorted
Shorted
Shorted
Coil

7.2.8 ANALOG INPUTS AND OUTPUTS

"0"
"1000" (repeat all for Analog Inputs 2 to 4)
"Enabled"
"0%" (enter %, repeat for Outputs 2 to 4)
EXPECTED MEASURED ANALOG INPUT
ANALOG INPUT
READING
4 1
0 units
250 units
500 units
750 units
1000 units
READING (UNITS)
2 3 4
7-7
7