Mentor, OH 44060
Ph: (440) 701-1031
Fax: (440) 918-1120
AMP Calculation for Control Selection
| Single | Three Phase Balanced | |||||||
| Heater Wattage |
120V | 208V | 240V | 480V | 208V | 240V | 480V | 600V |
| 500 | 4.2 | 2.4 | 2.1 | 1.1 | 1.4 | 1.2 | 0.6 | 0.5 |
| 1,000 | 8.4 | 4.8 | 2.1 | 2.1 | 2.8 | 2.5 | 1.2 | 1.0 |
| 2,000 | 16.7 | 9.7 | 8.4 | 4.2 | 5.6 | 4.9 | 2.5 | 1.9 |
| 3,000 | 25.0 | 14.5 | 12.5 | 4.2 | 8.4 | 7.3 | 3.7 | 2.9 |
| 4,000 | 33.4 | 19.3 | 16.7 | 8.4 | 11.2 | 9.7 | 4.9 | 3.9 |
| 5,000 | 41.7 | 24.0 | 20.8 | 10.4 | 14.0 | 12.1 | 6.0 | 4.8 |
| 6,000 | 50.0 | 28.9 | 25.0 | 12.5 | 16.7 | 14.5 | 7.3 | 5.8 |
| 7,000 | 58.3 | 33.7 | 29.2 | 14.6 | 19.5 | 16.9 | 8.4 | 6.7 |
| 8,000 | 66.7 | 38.5 | 33.4 | 16.7 | 22.3 | 19.3 | 9.7 | 7.7 |
| 9,000 | 75.0 | 43.3 | 37.5 | 18.8 | 25.1 | 21.7 | 10.9 | 8.7 |
| 10,000 | 83.3 | 48.1 | 41.7 | 20.9 | 27.8 | 24.1 | 12.0 | 9.6 |
| 12,000 | 100.0 | 57.7 | 50.0 | 25.0 | 33.4 | 29.0 | 14.5 | 11.6 |
| 15,000 | 125.0 | 72.1 | 62.5 | 31.2 | 41.7 | 36.1 | 18.1 | 14.5 |
| 18,000 | 150.0 | 88.6 | 75.0 | 37.5 | 50.1 | 43.4 | 21.7 | 17.3 |
| 21,000 | 175.0 | 101.0 | 87.5 | 43.8 | 58.3 | 50.6 | 25.3 | 20.5 |
| 24,000 | 200.0 | 115.4 | 100.0 | 50.0 | 66.7 | 57.8 | 28.9 | 23.0 |
| 27,000 | 225.0 | 129.9 | 112.5 | 56.3 | 75.1 | 65.1 | 32.6 | 26.0 |
| 30,000 | 250.0 | 144.2 | 125.0 | 62.5 | 83.3 | 72.3 | 36.1 | 28.9 |
| 36,000 | 300.0 | 173.1 | 150.0 | 75.0 | 100.0 | 86.8 | 43.4 | 34.7 |
Controls are determined by finding the amperage per line and multiplying by 1.25 factor.
For single phase or two wire power supplies to heaters:
| AMP Rating Per Pole* | = |
|
For three phase balanced power supplies (Delta or Wye connections) to heaters using a three-pole contactor.
| AMP Rating Per Pole* | = |
|
Contactor Sizing: *Amp rating per pole x1.25 = contactor rating.
TECH ADVICE
08.06.07 | Handle your Teflon heater with care
08.03.07 | Maximum temperature for chemical resistance
08.03.07 | Low liquid level can expose the heater's hot zone
08.03.07 | Cleaning Teflon heaters
