GE 489

7-6 489 Generator Management Relay
GE Power Management
7.2 HARDWARE FUNCTIONAL TESTING 7 TESTING
7
7.2.6 RTD ACCURACY
The specification for RTD input accuracy is ±2° for Platinum/Nickel and ±5° for Copper. Perform the steps below.
1. Alter the following setpoints:
S8 RTD TEMPERATURE\RTD TYPE\STATOR RTD TYPE:
100 ohm Platinum (select desired type)
S8 RTD TEMPERATURE\RTD #1\RTD #1 APPLICATION:
Stator (repeat for RTDs 2 to 12)
2. Measured values should be ±2°C / ±4°F for platinum/nickel and ±5°C / ±9°F for copper. Alter the resistance applied to
the RTD inputs as shown below to simulate RTDs and verify accuracy. View the measured values in
A2 METERING
DATA\TEMPERATURE
.
APPLIED
RESISTANCE
100
Ω
PLATINUM
EXPECTED RTD
TEMPERATURE READING
MEASURED RTD TEMPEATURE
SELECT ONE: ____°C ____°F
°C °F 1 2 3 4 5 6 7 8 9 10 11 12
84.27
Ω
–40°C –40°F
100.00
Ω
0°C 32°F
119.39
Ω
50°C 122°F
138.50
Ω
100°C 212°F
157.32
Ω
150°C 302°F
175.84
Ω
200°C 392°F
194.08
Ω
250°C 482°F
APPLIED
RESISTANCE
120
Ω
NICKEL
EXPECTED RTD
TEMPERATURE READING
MEASURED RTD TEMPEATURE
SELECT ONE: ____°C ____°F
°C °F 1 2 3 4 5 6 7 8 9 10 11 12
92.76
Ω
–40°C –40°F
120.00
Ω
0°C 32°F
157.74
Ω
50°C 122°F
200.64
Ω
100°C 212°F
248.95
Ω
150°C 302°F
303.46
Ω
200°C 392°F
366.53
Ω
250°C 482°F
APPLIED
RESISTANCE
100
Ω
NICKEL
EXPECTED RTD
TEMPERATURE READING
MEASURED RTD TEMPEATURE
SELECT ONE: ____°C ____°F
°C °F 1 2 3 4 5 6 7 8 9 10 11 12
77.30
Ω
–40°C –40°F
100.00
Ω
0°C 32°F
131.45
Ω
50°C 122°F
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
APPLIED
RESISTANCE
10
Ω
COPPER
EXPECTED RTD
TEMPERATURE READING
MEASURED RTD TEMPEATURE
SELECT ONE: ____°C ____°F
°C °F 1 2 3 4 5 6 7 8 9 10 11 12
7.49
Ω
–40°C –40°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