Description:

MSA Tower switch mode (IGBT) rectifier, air-cooled:

• Modular “building block” design is easily expandable
• < 3% ripple through full output range for consistent process results
• High efficiency (>90%) and power factor through the full output range
• Smaller and lighter than SCR or power stat rectifiers
• 100% duty cycle (rated for 100% output 24/7)
• Corrosion resistant, e-coat primer with powder coat top coat, steel cabinet
• Steel base and removable side panels
• All connections accessible from outside, making maintenance easy
• To remove/add a module: simply loosen screw and cable connections (disassembly of module stack is not necessary)
• DC output through copper bus bars in the back
• All power conductors are made exclusively out of copper
• Current and voltage adjustable from 1% to 100% with wear-free power semiconductors
• Complete modular rectifier concept designed as a ready-to-go system
• Switch mode modules operated in parallel to achieve specified output
• Each module housed in a e-coat primed, powder coated enclosure for maximum corrosion protection
• Design allows for quick and easy replacement of the modules if needed
• 0-10 V analog interface for automatic line control systems

Integrated power module features:

• System consists of one control module, plus one to five power modules
• High efficiency, 19” rack mount switch mode power modules (up to 25kW each) operating in parallel
• Maximum of 5 modules, up to 125kW (up to 7500A depending on VDC)
• Maximum output voltage (depending on model chosen) 45 VDC
• EMC filter to minimize EMC noise to the power grid
• Fully electronic current and voltage control loop
• Highly efficient control and rectification system with galvanic isolation between AC input and DC output

Air cooling system:

• Cooling air flow: air intakes on the bottom of each module and exhausts out the rear of each module
• Minimal cooling air required: variable speed, thermostatically controlled fans
• All sensitive electronics are sealed from the cooling air
• Air is directed only to the heat sinks cooling the power components
• All circuit boards are conformal coated for additional corrosion protection
• Thoughtful design ensures exceptional service life

Main Components:

• Circuit breaker with overcurrent trip function
• EMC filter to reduce noise back to the power grid
• Electronics for constant current and voltage control
• Power distribution panel

Protection Devices:

• Ultra-fast DC over-current protection
• DC short-circuit current limitation
• Over-temperature protection (with indication through potential-free contact)

Controls Interface:

• Set-point adjustment for Volts & Amps: 0 – 10Vdc
• Voltage feedback values: 0 – Volts actual: 0 – 10Vdc
• Current feedback values: 0 – Amps actual: 0 – 10Vdc
• On/Off via potential-free contact (Customer)
• Fault Feedback (Customer)

The photo of the three power modules is shown below:

Technical Data:

• Input voltage: 480 V (±10 %), 3 Ph, 50-60 Hz + GND
• Input current: 143 A
• Power factor: > 0.95
• DC output voltage: 16 V
• DC output current: 6000 A
• Duty factor: 100%
• Ripple: 2 to 3% (through entire power curve)
• Adjustment: 0 – 100% current and voltage
• Control: constant current and voltage control
• Control accuracy: < 1%
• Cooling: Forced air cooled
• Ambient temperature: Up to 104° F, Up to 122° F at de-rated power
• Site altitude: Up to 3280 feet above sea level
• Rectifier Dimensions: 20 W x 24.5 D x 55 H inches
• Power Panel Dimensions: 13 W x 4 D x 17 H inches
• Weight: 565 lbs.
• Pedestal Dimensions: 21.3 W x 21.7 D x 4 H inches

Our stainless steel pedestal for the MSA Tower rectifiers comes standard and elevates the rectifier off the floor (+ 4 inches). It helps to prevent liquid or dust from entering the rectifier from the floor.

To discuss your requirements, please contact us 714-624-4740, or send us an email at quote@cehco.com