GE 469

CHAPTER 7: TESTING
469 MOTOR MANAGEMENT RELAY – INSTRUCTION MANUAL 7–7
7.2.6 Digital Inputs and Trip Coil Supervision
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.
Z Open switches of all of the digital inputs and the trip coil supervision
circuit.
Z View the status of the digital inputs and trip coil supervision in:
ACTUAL VALUES Z A1 STATUS ZV DIGITAL INPUTS
Z Close switches of all of the digital inputs and the trip coil supervision
circuit.
Z View the status of the digital inputs and trip coil supervision in:
167.20 Ω 100°C 212°F
207.45 Ω 150°C 302°F
252.88 Ω 200°C 392°F
305.44 Ω 250°C 482°F
Table 7–3: 100 Ω NICKEL TEST
APPLIED
RESISTANCE
100 Ω
NICKEL
EXPECTED RTD
TEMPERATURE
READING
MEASURED RTD TEMPERATURE
SELECT ONE: ____(°C) ____(°F)
°Celsius °Fahrenheit
123456789101112
Table 7–4: 10 Ω COPPER TEST
APPLIED
RESISTANCE
10 Ω COPPER
EXPECTED RTD
TEMPERATURE
READING
MEASURED RTD TEMPERATURE
SELECT ONE: ____(°C) ____(°F)
°Celsius °Fahrenheit
123456789101112
7.10 Ω –50°C –58°F
9.04 Ω 0°C 32°F
10.97 Ω 50°C 122°F
12.90 Ω 100°C 212°F
14.83 Ω 150°C 302°F
16.78 Ω 200°C 392°F
18.73 Ω 250°C 482°F