Rectifiers For Electrophoresis
The cathodic deposition process of paints requires power supplies capable of providing adjustable direct voltages up to several hundred volts, carefully stabilized and smoothed, with precise rise ramps adjustable according to the different phases of the process. Operator protection devices must be safe and redundant.
CAEV designs and manufactures a line of rectifiers for electrophoresis with adjustable voltages up to 900Vdc and currents up to 3000Adc.
Technical Features
- Three-phase power supply according to customer requirements
- Main switch with door interlock
- Power transformer compliant with IEC standards
- Thyristor-controlled rectifier circuit: six-phase connection with reactor, three-phase bridge,
- twelve-phase
- Output voltage and current adjustable from 0 to the maximum value
- Adjustable ramp for output voltage and current rise
- Adjustable holding voltage
- Holding voltage activation by external consent
- Constant voltage and constant current regulation
- 1% stabilization of the set values for load or supply voltage variations
- Output current ripple smoothed with LC filter cell according to customer specifications
- Manual controls on panel front or in remote control panel
- Display of delivered voltage and current
- Remote PLC control with opto-isolated signals… 0-20mA, 4-20mA, 0-10Vdc
- Remote PLC control with Modbus or Profibus serial connection
- Forced air cooling
- Closed-loop water cooling
- Cooling with air conditioner for IP55 cabinets
- Cabinets painted with epoxy paints
- Cabinets with lifting eyebolts, feet, or wheels for easy handling
- Cabinet protection degree: IP20…IP55
- Magnetic and thermal protection of the entire equipment
- Overtemperature protection
- Protection of semiconductors with ultra-fast fuses
- RC networks for semiconductor protection
- Electronic limitation of maximum deliverable current for overload protection
- Control of correct phase sequence of the power supply
- Protection of auxiliary circuits with fuses and circuit breakers
- Connections with copper and aluminum busbars
- Machine shutdown in case of plant protection barrier opening (Pilz relay)
Optional devices:
- Ramp programmer
- Digital ammeter
- Process timer
