Cathodic Protection Rectifiers, Standard Line, Air Cooled by Universal Rectifiers
Farwest “Standard Line” air cooled cathodic protection rectifiers, manufactured by Universal Rectifiers, are recognized as industry leading in quality, workmanship and service life. Many years of field-proven service prove their superior design. Conservative equipment ratings, controlled manufacturing techniques, plus many extra features ensure long and trouble-free operation.
Typical cathodic protection applications for the air cooled rectifier line include pipelines, storage tanks, and many other non-hazardous locations where continuous duty, DC cathodic protection power is required.
Air cooled cathodic protection rectifier purchasing specification
Standard Rectifier Features
- Weatherproof to NEMA 3R
- Heavy duty 11-gauge, hot dip galvanized cabinet with stainless steel hardware
- Stainless steel, perforated ventilation screens
- Front and side opening doors for easy access and maintenance
- Heavy duty, draw-pull, stainless steel cabinet latch
- Slide-out equipment racks with separate transformer and stack assemblies for units over 1200 watts
- Heavy-duty transformer with 15% over-design for reserve capacity
- Standard18-step voltage control link bar taps.
- Additional adjustment steps can be custom ordered.
- Quick-change, heavy-duty knobs for changing tap link bars
Air Cooled Rectifier Ordering Guide
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Position #1: Model Type |
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A = Standard Air Cooled Line |
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Position #2: Adjustment Type |
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S = Standard Rectifier (Manual taps) |
P = Constant potential (solid state) |
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Position #3: Cooling |
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A = Air Cooled |
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Position #4: Stack Type |
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I = Silicon (recommended) |
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Position #5: DC Output Voltage Rating |
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List Maximum DC Voltage Desired (such as 50 for 50 volts) |
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Position #6: DC Output Amp Rating |
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List Maximum DC Amperage Desired (such as 25 for 25 amps) |
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Position #7: AC Input Voltage Rating |
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AA = 115/230 volts, 1 phase, set for 115 VAC |
AB = 115/230 volts, 1 phase, set for 230 VAC |
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Position #8: Special Optional Features |
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C = AC and DC arrestors |
O = Aluminum cabinet option |
Air-cooled cabinets are available in the following standard size configurations.
| Case Dimensions (inches) | ||||||||||||
| Case Size |
A | B | C | D | E | F | G | H | I | J | K | L |
| A | 14.5 | 12 | 19.5 | 3 | 14.5 | 19 | 26.25 | 3 | 7.5 | 6 | 7.5 | 3 |
| B | 17.5 | 15.5 | 23.5 | 3.5 | 18 | 23 | 32 | 3 | 9 | 8 | 10 | 6 |
| C | 22.5 | 21.5 | 23.5 | 3.5 | 24 | 28 | 32 | 3 | 9 | 10 | 15 | 10 |
| D | 28.5 | 22.5 | 23.5 | 3.5 | 25 | 34 | 32 | 3 | 9 | 12 | 21 | 10 |
| E | 34 | 28 | 33 | 5 | 33 | 44 | 41.25 | 3 | 18.5 | 14 | 25 | 14 |
| Chassis Dimensions | ||||
| Rectifier Size | Chassis Width | Chassis Depth | Chassis Height | No. of Chassis |
| A | 11.5" | 11.5" | 18" | 1 |
| B | 14.5" | 14.5" | 10" (20" total) | 2* |
| C | 19" | 21" | 10" (20" total) | 2* |
| D | 25.5" | 22" | 10" (20" total) | 2* |
The air cooled rectifier cabient size varies with the rectifier output size. To determine the rectifier wattage, multiply the DC output voltage x the output current for.
Example: 50 volts x 50 amps = 2,500 DC watts. Requires a size "B" rectifier cabinet.
| Single Phase | Three Phase | |||
| Case Size |
Maximum DC Watts |
Shipping Weight |
Maximum DC Watts |
Shipping Weight |
| A | 1,200 | 135 lbs | - | - |
| B | 2,800 | 185 lbs | 1,000 | 255 lbs |
| C | 6,000 | 300 lbs | 6,500 | 385 lbs |
| D | 10,000 | 400 lbs | 12,000 | 625 lbs |
| E | 12,000 | 525 lbs | 18,000 | 750 lbs |
Note: While this chart represents typical cabinet sizes and wattage ratings, adding optional equipment, such as a filter choke, may require that the cabinet size be increased to accept the additional equipment and/or to deal with additional heat generated by the optional equipment.
