Alarm Trip & Temperature Settings

Alarm Trip & Temperature Settings

Question: What do you recommend as alarm and shut-down temperature settings for winding RTD’s?

Answer: The following tables (Tables 1 and 2) show alarm and shut-down temperatures based on the motor service factor, HP rating, and class of temperature rise. These temperatures apply to both winding RTD’s and thermocouples. See winding termperature detectors section for alarm / shut-down temperatures of thermostats and thermistors.

Table 1: Monitors With Alarm and Shutdown

TEMPERATURE IN ° C
Insulation	CLASS A		CLASS B		CLASS F
Rating	Alarm	Trip	Alarm	Trip	Alarm	Trip
1.0SF<1500HP	110	120	130	140	155	165
1.0SF>1500HP	105	115	125	135	150	160
1.15SF<1500HP	120	130	140	150	160	165
1.15SF>1500HP	115	125	135	145	160	165

Table 2: Monitors With Shutdown Only

INSULATION	TEMPERATURE IN ° C
RATING	CLASS A	CLASS B	CLASS F
1.0SF<1500HP	110	130	155
1.0SF>1500HP	105	125	150
1.15SF<1500HP	120	140	160
1.15SF>1500HP	115	135	160

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