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.
a) 4-20mA
1. Alter the following setpoints:
S11 ANALOG I/O\ANALOG INPUT1\ANALOG INPUT1:
S11 ANALOG I/O\ANALOG INPUT1\ANALOG INPUT1 MINIMUM:
S11 ANALOG I/O\ANALOG INPUT1\ANALOG INPUT1 MAXIMUM:
Analog output values should be ±0.2 mA on the ammeter. Measured analog input values should be ±10 units. Force
2.
the analog outputs using the following setpoints:
S12 TESTING\TEST ANALOG OUTPUT\FORCE ANALOG OUTPUTS FUNCTION:
S12 TESTING\TEST ANALOG OUTPUT\ANALOG OUTPUT 1 FORCED VALUE:
3. Verify the ammeter readings as well as the measured analog input readings. For the purposes of testing, the analog
input is fed in from the analog output (see Figure 7-1). View the measured values in:
A2 METERING DATA\ANALOG INPUTS
Table 7–3: ANALOG INPUT/OUTPUT TEST, 4 to 20 mA INPUT
ANALOG EXPECTED
OUTPUT AMMETER
FORCE READING
VALUE
0% 4 mA
25% 8 mA
50% 12 mA
75% 16 mA
100% 20 mA
GE Power Management
 PASS
 FAIL
(SWITCH OPEN)
Open
Open
Open
Open
Open
Open
Open
Open
Open
No Coil
4-20 mA
MEASURED AMMETER READING
(MA)
1 2 3
489 Generator Management Relay
7.2 HARDWARE FUNCTIONAL TESTING

7.2.7 DIGITAL INPUTS AND TRIP COIL SUPERVISION

 PASS
EXPECTED STATUS
 FAIL
(SWITCH CLOSED)
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
ANALOG INPUT
READING
4 1
0 units
250 units
500 units
750 units
1000 units
MEASURED ANALOG INPUT
READING (UNITS)
2 3 4
7-7
7