Motor Winding Resistance, Circuit Breakers

 

1 Phase 3 Wire Motor Winding Resistance, 1-Phase 2 Wire Motor Winding Resistance, 3-Phase Motor Windings, Delta or Wye

 

 

Tuhorse Motor Winding Static Resistance (at 25°C)
 
      Line-to-Line Resistance (Ohms)    
  KW Volts BL-YL YL - RED BL - RED Winding Connection Circuit Breaker Used In Power Service Panel

 3" Single Phase, 3-Wire 
3/4HP 0.55 230 4.6 11.3 16 3-wire 15
1HP 0.75 230 3.7 8.3 12 3-wire 15
 4" Single Phase 230V, 3-Wire               
1HP 0.75 230 2.7 5.1 7.8 3-wire 15
1.5HP 1.1 230 2.2 3.6 5.8 3-wire 20
2HP - 2015 and before 1.5 230 1.5 3.7 4.1 3-wire 25
2HP - 2016 and after 1.5 230 1.5 2.6 4.1 3-wire 25
3HP - 2015 and before 2.2 230 1.1 2.7 3.8 3-wire 30
3HP - 2016 and after 2.2 230 1.1 2.1 3.3 3-wire 30
5HP 3.7 230 0.9 2.2 3.1 3-wire 50
 4" Single Phase, 2-Wire               
1HP 0.75 230 - - 2.7 2-wire 20
1.5 HP 1.1 230 - - 2.1 2-wire 25
 4" 3 Phase 230V               
2HP 1.5 230 2.5 2.5 2.5 Delta 20
3HP 2.2 230 1.5 1.5 1.5 Delta 25
5.5HP 4 230 0.9 0.9 0.9 Delta 30
 4" 3 Phase 460V               
3HP 2.2 460 6.1 6.1 6.1 Wye 15
5.5HP 4 460 3.6 3.6 3.6 Wye 20
 6" 3 Phase 230V               
10HP Oil Cooled 7.5 230 0.5 0.5 0.5 Delta 60
10HP Water Cooled 7.5 230 0.4 0.4 0.4 Delta 60
20HP Oil Cooled 15 230 0.2 0.2 0.2 2-Delta 100
20HP Water Cooled 15 230 0.2 0.2 0.2 2-Delta 100
 6" 3 Phase 460V               
10HP Oil Cooled 7.5 460 2 2 2 Wye 35
10HP Water Cooled 7.5 460 1.7 1.7 1.7 Wye 35
20 HP Oil Cooled 15 460 0.8 0.8 0.8 Delta 60
20 HP Water Cooled 15 460 0.8 0.8 0.8 Delta 60
30 HP Oil Cooled 22 460 0.5 0.5 0.5 Delta 80
30 HP Water Cooled 22 460 0.6 0.6 0.6 Delta 80
 Solar               
210W 36V 3" 0.21 36 0.5 0.5 0.5 Delta N/A
500W 48V 3" (0.7HP) 0.5 48 0.4 0.4 0.4 Delta N/A
1000W 110V 4"  (1.4HP) 1 110 0.6 0.6 0.6 Delta N/A
1500W(2HP) DC150V / AC120V 1.5 150 0.7 0.7 0.7 Delta 20A (AC)
2200W(3HP) DC220V / AC230V 2.2 220 1 1 1 Delta 25A (AC)