7–14 745 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
METERING CHAPTER 7: COMMISSIONING
7.4.5.3 Ambient Temperature by Monthly Averages
If the ambient temperature is entered as 12 monthly averages, program
the value for the month during which the relay is being commissioned.
Examine the A2 METERING
AMBIENT TEMP AMBIENT
TEMPERATURE actual value to verify the programmed temperature.
Verify that values entered for other months do not affect the value for
the present month.
7.4.6 Analog outputs
The analog output settings are located in the S2 SYSTEM SETUP ANALOG OUTPUTS
setpoints section.
Connect a milliammeter to the analog output contacts: COM on A5 and
analog output 1 on A6, analog output 2 on A7, analog output 3 on A8,
analog output 4 on A9, analog output 5 on A10, analog output 6 on A11,
or analog output 7 on A12.
From the settings used for the tested analog output, determine the mA
range for the output and the driving signal and its range for the full
range of output current.
Apply the input signal and vary its amplitude over the full range and
ensure the analog output current is the correct amplitude.
Record the results in the table below.
Duplicate as required for each analog output.
120 Ω Nickel 86.17 –50 –58
120.0 0 32
157.74 50 122
200.64 100 212
248.95 150 302
303.46 200 392
366.53 250 482
100 Ω Nickel 71.81 –50 –58
100.00 0 32
131.45 50 122
167.20 100 212
207.45 150 302
252.88 200 392
305.44 250 482
Table 7–1: Measured RTD temperature
RTD type
100
Ω Platinum
resistance
Expected RTD reading Measured RTD temperature
____°C ____°F (select one)
°C °F
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