CHAPTER 5: SETPOINTS
489 GENERATOR MANAGEMENT RELAY – INSTRUCTION MANUAL 5–65
5.9.2 RTDs 1 to 6
PATH: SETPOINTS ZV S8 RTD TEMPERATURE ZV RTD #1(6)
RTDs 1 through 6 default to Stator RTD type. There are individual alarm and trip
configurations for each RTD. This allows one of the RTDs to be turned off if it malfunctions.
The alarm level is normally set slightly above the normal running temperature. The trip
level is normally set at the insulation rating. Trip voting has been added for extra reliability
in the event of RTD malfunction. If enabled, a second RTD must also exceed the trip
temperature of the RTD being checked before a trip will be issued. If the RTD is chosen to
vote with itself, the voting feature is disabled. Each RTD name may be changed if desired.
180 356 168.47 280.77 233.97 16.00
190 374 172.46 291.96 243.30 16.39
200 392 175.84 303.46 252.88 16.78
210 410 179.51 315.31 262.76 17.17
220 428 183.17 327.54 272.94 17.56
230 446 186.82 340.14 283.45 17.95
240 464 190.45 353.14 294.28 18.34
250 482 194.08 366.53 305.44 18.73
Table 5–6: RTD Temperature vs. Resistance
Temperature 100 Ω Pt
(DIN 43760)
120 Ω Ni 100 Ω Ni 10 Ω Cu
° C ° F
1 RTD #1 [Z] RTD #1 APPLICATION:
Stator
Range: Stator, Bearing, Ambient, Other,
None
MESSAGE
RTD #1 NAME:
Range: 8 alphanumeric characters
MESSAGE
RTD #1 ALARM:
Off
Range: Off, Latched, Unlatched
MESSAGE
ASSIGN ALARM
RELAYS (2-5): ---5
Range: Any combination of Relays 2 to
5.
MESSAGE
RTD #1 ALARM
TEMPERATURE: 130°C
Range: 1 to 250°C in steps of 1
MESSAGE
RTD #1 ALARM
EVENTS: Off
Range: On, Off
MESSAGE
RTD #1 TRIP:
Off
Range: Off, Latched, Unlatched
MESSAGE
RTD #1 TRIP VOTING:
RTD #1
Range: RTD #1 to RTD #12
MESSAGE
ASSIGN TRIP
RELAYS (1-4): 1---
Range: Any combination of Relays 1 to
4
MESSAGE
RTD #1 TRIP
TEMPERATURE: 155°C
Range: 1 to 250°C in steps of 1
Courtesy of NationalSwitchgear.com
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