SCR Rectifiers

American Plating Power offers SCR based rectifiers in ratings up to 600VDC and 100,000 Amps.  These precision and efficiently engineered designs are available in air, water, closed-loop and oil-immersed models.  The equipment combines a compact design with easy access. The standard and custom rectifiers are all designed in accord with the latest directives of CE along with internationally recognized standards such as NEMA, IEEE and ANSI. 

Technical Data (Standard)

Options:

  • Polarity Reversal
  • NRTL Label
  • Pulse Operation
  • Ripple Correction
  • Custom Enclosures

Air-Cooled SCR Rectifiers

Output Capabilities: 0-600VDC, 0-20,000A
Enclosure Rating: NEMA 2/IP 21
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Description:

Our air cooled silicon rectifier, with primary thyristor controlled is featured with voltage and current control function. The unit is cooled by a forced air cooling system achieved by the integrated low noise emission fan. The rectifier is integrated into a solid cabinet and is intended for remote control (0 – 10 V).

One of the outstanding features of the offered technology is the low noise fan design. Instead of a high volume fan, this rectifier is featured with a special air guiding system and special fan design, which prevents dripping solution from entering the cabinet. The required cooling air will be guided into the cabinet from the sides. The rectifier is rated for continuous, full load, industrial operation without any reduction in output power.

Construction:

The rectifier is built into a rigid steel cabinet with a base frame, front door, and removable sides. This construction design feature allows for easy maintenance and access to all parts. Cooling is achieved with an integrated fan.

For maximum efficiency, all internal conductors, as well as the transformer windings, are exclusively made out of copper. The solid copper DC output bus bar connections are located on the back side of the rectifier cabinet, with the input power and controls connections entering through the top of the enclosure to internal connection terminals.

The advanced air guidance system directs cooling air exclusively to electrical components requiring cooling and protects sensitive components against corrosive chemical vapors.

Main Components:

  • Input breaker
  • Advanced control electronics to control the DC output current resp. voltage
  • µcontroller based monitoring and diagnosis system
  • Three phase thyristor bridge with over-voltage protection
  • Rectifier transformer with separate windings
  • Diode set with over-voltage protection
  • Shunt
  • Ventilation system

 

Protection Devices:

  • Electronic DC over-current trip
  • Phase sequence supervision
  • Phase unbalance supervision
  • Mains under voltage super vision
  • Temperature monitoring

 

Technical Data:

Mains Voltage3 x 208VAC – 600VAC 50/60 Hz
(other voltages available upon request)
Output Current>1000A – 15kA
Output Voltage> 6V – 600V
AdjustmentStepless from 0 – 100 %
RippleApprox. 5% at full load
(Option: ripple filter ≤ 5 % in a defined range)
Duty Factor100%
Ambient Temperature95°F
(Option: > 95°F)
Protection GradeNEMA 12

Oil-Cooled SCR Rectifiers

Output Capabilities: 0-600VDC, 0-15,000A
Enclosure Rating: Up to NEMA 4/IP 56
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Description:

Our natural oil cooled silicon rectifier, with secondary thyristor adjustment, is integrated into a robust oil tank and is intended for remote control operation. The adjustment of the rectifier can be carried out electronically via analog signals (0-10Vdc) for constant current and voltage control. It is rated for continuous, full load, industrial operation without any reduction in output power.

Construction:

The rectifier is enclosed in a tough, corrugated oil tank which fulfills all of the requirements up to a NEMA 4/IP 56. This housing is ideal for installation in the most aggressive of environments, as is the cooling method. With oil cooling, there is no need for cooling air to be drawn through the internal components, which prevents depositing of any contaminants (especially dust) into the rectifier section.

For maximum efficiency, all internal conductors, as well as the transformer windings, are exclusively made out of copper. The controls enclosure and DC output bus bars are located on top of the tank.

Main Components:

  • Input fuses, ultra-fast-blow
  • Input contactor
  • Three phase thyristor set
  • Rectifier transformer with separate windings
  • Shunt

 

Protection Devices:

  • Over-current and short-circuit monitoring
  • Oil temperature monitoring
  • Asymmetric voltage monitoring relay

 

Standard Technical Data:

Mains Voltage3 x 208VAC – 600VAC 50/60 Hz
(other voltages available upon request)
Output Current> 1000 A up to 15 kA
Output Voltage> 6 V up to approx. 600 V
AdjustmentStepless from 0 – 100%
RippleApprox. 5% to 7% at full load
(Option: ripple filter ≤ 5 % in a defined range)
Duty Factor100%
Ambient Temperature95°F
(Option: > 95°F)
Protection GradeNEMA 12 – NEMA 4

Water-Cooled SCR Rectifiers

Output Capabilities: 0-600VDC, 0-100,000A
Enclosure Rating: NEMA 12/IP 65
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Description:

Our complete water cooled, thyristor controlled high power rectifier, is designed for water cooling. The rectifier is featured with a specially designed combination inverter and rectification circuit to reduce the total losses of the semiconductors, which results in lower operation costs

The rectifier is integrated into a special designed cabinet and is intended for remote control via analog signals (0 – 10V).

Construction:

This unit has been built into a special, robust cabinet.  The lacquered housing consists of a steel frame and base. A maintenance friendly, modular construction neatly rounds off the concept of this rectifier. For maximum efficiency, all internal conductors, as well as the transformer windings, are exclusively made out of copper.

The total water-cooling system for this rectifier has been specially designed by us. It ensures complete, efficient cooling, allowing over 90% of all generated heat losses to be removed directly by the cooling water. For this reason, the surrounding increase in air temperature is negligible in comparison with other systems, notably oil and air. The connections for cooling water entry and exit are located on the back side of the enclosure. The best water to be used for cooling is any which has the same properties as tap water – exact details can be found in the following cooling-water specification.

Main Components:

  • Input fuses
  • Input contactor to isolate all poles when in the “off” position
  • Advanced control electronics for the thyristor inverter
  • µcontroller based monitoring and diagnosis system
  • Water cooled rectifier transformer, vacuum impregnated
  • Water cooled, thyristor based inverter and rectification circuit with RC snubber circuit
  • Precise, water cooled DC measuring shunt, degree of accuracy 0.5

 

Protection Devices:

  • Phase failure monitor
  • Phase unbalance monitor
  • Input under voltage monitoring
  • Water flow monitor
  • Water level monitoring
  • Temperature monitor for transformer, thyristors
  • DC over current monitor

 

Standard Technical Data:

Mains Voltage3 x 208VAC – 600VAC 50/60 Hz
(other voltages available upon request)
Output Current>1000A – 100kA
Output Voltage> 6V – 600V
AdjustmentStepless from 0 – 100 %
RippleApprox. 5% at full load
(Option: ripple filter ≤ 5 % in a defined range)
Duty Factor100%
Ambient Temperature95°F
(Option: > 95°F)
Water Entry TemperatureApprox. 60°F up to 85°F
Protection GradeNEMA 12 – NEMA 4

Oil-to-Water Cooled SCR Rectifiers

Output Capabilities: >1000A – 15kA
Enclosure Rating: NEMA 4
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Features:

 

 

  • Robust Construction
  • Easy maintenance
  • Excellent price/performance ratio
  • Perfect for harsh industrial environments

 

Standard Technical Data:

 

Mains Voltage3 x 208VAC – 600VAC 50/60 Hz
(other voltages available upon request)
Output Current>1000A – 15kA
Output Voltage> 6V – 600V
AdjustmentStepless from 0 – 100 %
RippleApprox. 5% at full load
(Option: ripple filter ≤ 5 % in a defined range)
Duty Factor100%
Ambient Temperature95°F
(Option: > 95°F)
Water Entry TemperatureApprox. 60°F up to 85°F
Recommended Insulating OilShell Diala A
SupervisionOil temperature
Overcurrent relay
Protection GradeNEMA 4