Cathodic Protection Rectifiers, Oil Cooled, by Universal Rectifiers
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| Rectifier cabinet | Rectifier cabinet internals. |
Typical cathodic protection applications for the oil cooled rectifier line include severe environmental conditions due to high humidity, dust, or other situations that would shorten the life of a standard air cooled rectifier.
Explosion proof models are used for Class 1, Group D locations and comply with U.L. Standard 698. While similar to the standard oil cooled rectifiers, the explosion proof units are fitted with special hazardous area fittings to eliminate possibility of an ignition source.
Oil cooled cathodic protection rectifier purchasing specification
- Industry leading three-year limited warranty.
- Heavy duty 11 gauge hot dipped galvanized cabinet with hinged top lid with top brace.
- External cabinet fins for added strength and cooling.
- Quick release, heavy duty stainless steel latches.
- Separate instrument compartment with hinged door.
- Separate lift-out component racks for the transformer and rectifier stack.
- Heavy duty transformer with 15% overdesign for reserve capacity.
- 18-step voltage control link bar taps.
- Quick-change heavy duty knobs for changing tap link bars on units under 140 amps.
- Magnetic AC circuit breaker.
- Hoyt model 17-3 volt and amp meters.
- Avalanche silicon diodes with a minimum 1,200 PIV.
- Primarily forward polarity diodes.
- Diode protection by surge suppressors plus breakers or fuses.
- Electrical connections double-nutted or soldered.
- Multi-strand, flexible wiring with TEW insulation rated at 105 degrees C and 600 volts.
- A variety of AC voltage inputs.
- AC and/or DC lightning protection.
- Efficiency filter chokes.
- Communication filters.
- Meter switches.
- DC circuit breakers or fuses.
- Additional voltage control link bar taps.
- Alternate output control (constant current, constant voltage, constant potential, and constant potential with IR drop free feature.
- Other options per request of customer.
Typical Cabinet Dimensions
| Case Size |
Oil Gal Capacity |
Case Dimensions (inches) | Knockout Detail | ||||||||
| A | B | C | D | E | F | A | B | C | D | ||
| MAO | 20 | 18 | 15 | 24.5 | 24 | 26.75 | 17.75 | 3 | 1.75 | 4 | 4.25 |
| AO | 55 | 30 | 18.25 | 34 | 24 | 39.75 | 22 | 3 | 1.75 | 4 | 4.25 |
| BO | 110 | 36 | 21 | 46 | 24 | 46 | 25 | 3 | 3 | 4.5 | 4.25 |
| CO | 170 | 48 | 21 | 52 | 24 | 58.25 | 25 | 3 | 3 | 4.5 | 4.25 |
| DO | 213 | 60 | 21 | 52 | 24 | 70.25 | 25 | 3 | 3 | 4.5 | 4.25 |
| EO | 300 | 72 | 21 | 52 | 24 | 82.25 | 25 | 3 | 3 | 4.5 | 4.25 |
| FO | 465 | 84 | 30.5 | 52.5 | 24 | 93.5 | 34 | 3 | 3 | 4.5 | 4.25 |
| GO | 600 | 84 | 30.5 | 64.5 | 24 | 93.5 | 34 | 3 | 3 | 4.5 | 5.25 |
| Cabinet Wattage & Weight |
| Case Size |
Single Phase | Three Phase | ||
|---|---|---|---|---|
| Maximum DC Watts |
Shipping Weight | Maximum DC Watts |
Shipping Weight | |
| MAO | 500 | 200 lbs | - | - |
| AO | 501-1900 | 450 lbs | 0-3600 | 518 lbs |
| BO | 1901-3400 | 594 lbs | 3601-6400 | 660 lbs |
| CO | 3401-4250 | 731 lbs | 6401-8000 | 860 lbs |
| DO | 4251-5300 | 935 lbs | 8001-10000 | 1100 lbs |
| EO | 5301-6400 | 1020 lbs | 10001-12000 | 1200 lbs |
| FO | 6401-8500 | 1200 lbs | 12001-16000 | 1400 lbs |
| GO | 8502-10600 | 1400 lbs | 16001-20000 | 1600 lbs |
Universal Rectifier Ordering Guide
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Position #1: Model |
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O = Standard Line, Oil cooled |
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Position #2: 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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O = Oil Cooled Standard |
X = Oil Cooled (Hazardous Location) Class 1, Div. 2 |
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Position #4: Stack Type |
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I = Silicon (recommended) |
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Position #5: DC Volts |
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List Maximum DC Voltage Desired |
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Position #6: DC Amps |
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List Maximum DC Amperage Desired |
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Position #7: AC Input |
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AA = 115/230, 1 phase set for 115 vac |
AB = 115/230, 1 phase set for 230 vac |
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Position #8: Special Features |
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C = AC and DC arrestors |
K = DC failure warning light |
