C Ambient Temperature By Monthly Averages - GE 745 TRANSFORMER MANAGEMENT RELAY Instruction Manual

10.5 DISPLAY, METERING, COMMUNICATIONS, ANALOG OUTPUTS
Refer to RTD tables included in this manual for calibration of resistance versus temperature.
Table 10–1: MEASURED RTD TEMPERATURE – 100 Ω PLATINUM
100 Ω
PLATINUM
RESISTANCE
80.31
100.00
119.39
138.50
157.32
175.84
194.08
Table 10–2: MEASURED RTD TEMPERATURE – 120 Ω NICKEL
120 Ω NICKEL
RESISTANCE
86.17
120.0
157.74
200.64
248.95
303.46
366.53
Table 10–3: MEASURED RTD TEMPERATURE – 100 Ω NICKEL
100 Ω NICKEL
RESISTANCE
71.81
100.00
131.45
167.20
207.45
252.88
305.44
c) AMBIENT TEMPERATURE BY MONTHLY AVERAGES
10
1. If the ambient temperature is entered as 12 monthly averages, program the value for the month during
which the relay is being commissioned.
10-12
EXPECTED RTD READING
°C °F
–50 –58
0 32
50 122
100 212
150 302
200 392
250 482
EXPECTED RTD READING
°C °F
–50 –58
0 32
50 122
100 212
150 302
200 392
250 482
EXPECTED RTD READING
°C °F
–50 –58
0 32
50 122
100 212
150 302
200 392
250 482
745 Transformer Management Relay
MEASURED RTD
TEMPERATURE
____°C ____°F
(select one)
MEASURED RTD
TEMPERATURE
____°C ____°F
(select one)
MEASURED RTD
TEMPERATURE
____°C ____°F
(select one)
10 COMMISSIONING
GE Power Management