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12. A three-phase motor has a nameplate current of 92 amperes. The nameplate indicates a service factor of 1.25, which would size the heaters at 125% of full load current. Using the chart in Figure 4-7B, what size overload heaters should be used to protect this motor?

12. A three-phase motor has a nameplate current of 92 amperes. The nameplate indicates a service factor of 1.25, which would size the heaters at 125% of full load current. Using the chart in Figure 4-7B, what size overload heaters should be used to protect this motor?

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
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12. A three-phase motor has a nameplate current of 92 amperes. The nameplate indicates a service. factor of 1.25, which would size the heaters at 125% of full load current. Using the chart in Figure 4-7B, what size overload heaters should be used to protect this motor?
Transcribed Image Text:12. A three-phase motor has a nameplate current of 92 amperes. The nameplate indicates a service. factor of 1.25, which would size the heaters at 125% of full load current. Using the chart in Figure 4-7B, what size overload heaters should be used to protect this motor?
Overload heater selection for NEMA starter sizes O (D0-4. Heaters ae calibrated for 115% of motor full load current. Eor beaters thetrs are correspond to 125% of motor full load current use the next size larger Size 3 Sze 4 Imetal tes on rtion auses de by <pand <pand nange deter- 0,18 0 20 0.22 0.24 0.26 |0,38 0 42 rip. ends Figure 4-7B Typical overload heater chart m品高器|||||||||||||| 1||N|益||||||
Transcribed Image Text:Overload heater selection for NEMA starter sizes O (D0-4. Heaters ae calibrated for 115% of motor full load current. Eor beaters thetrs are correspond to 125% of motor full load current use the next size larger Size 3 Sze 4 Imetal tes on rtion auses de by <pand <pand nange deter- 0,18 0 20 0.22 0.24 0.26 |0,38 0 42 rip. ends Figure 4-7B Typical overload heater chart m品高器|||||||||||||| 1||N|益||||||
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