Air Cool Transformer Rectifier

Transformer rectifiers are the most frequently used power source for impressed current anode systems. The unit consists of a step-down transformer, to reduce alternating current to an acceptable level, and a rectifying element to convert the alternating current (A.C.) to usable direct current (D.C.). Output terminals and a whole host of options and accessories complete the final assembly of the unit. There are almost unlimited combinations of rectifier features and types, depending on the requirements of the project.

SYCHEM Transformer Rectifiers are designed for the cathodic protection of steel structures such as jetties, pipelines tank farms etc. The transformer rectifiers comply with the most stringent industry specifications and perform in demanding environmental conditions.

All units are manufactured according to strict safety regulations and quality assurance procedures under our ISO 9001 certification, and are fully in accordance with all applicable international standards.

Our company provides products with distinctive and innovative features that can be modulated to meet each client’s application specifications. In order to do so, we are able to incorporate a wide variety of specialized features into our transformer rectifiers, including local and remote monitoring of output voltage, current, reference electrode potentials, and remote control of output voltage and current.


Our Oil Cooled Transformer Rectifiers operate in temperatures up to 55°C and at current ratings of up to 600A, and are mostly suitable for heavy duty applications in demanding environmental conditions.

Air Cooled Transformer Rectifier units are used indoors in control environments and are less expensive compared to the oil cooled ones with the same capabilities


IEC 61000: Electromagnetic compatibility

IEC 60204: Safety of machinery. Electrical equipment of machines

IEC 60076: Power transformers

IEC 60146: Semiconductor converters

IEC 60439: Low voltage switch gear and control gear assemblies

IEC 60296: Fluids for electrotechnical applications – unused mineral insulating oils for transformers and switchgear

IEC 60529: Degrees of protection provided by enclosures (IP code)

IEC 60617: Graphical symbols for diagrams


Sealed to a protective category of
  • IP55
  • IP65
  • IP66
  • Mild Steel Heavy duty welded
  • Aluminum
  • Stainless Steel Heavy duty welded grades
  • 304
  • 316
  • Flame Zinc Spray
  • 2 Part Epoxy / Polyurethane Coating
Explosion Proof
  • Wall
  • Pole
  • Pad Mount
Slide out rack
Cooling Type
  • Air Cooled
  • Oil Cooled
  • Fan Cooled
Control Type
  • Continuously Variable Transformer (Variac)
  • Discrete Step Switching in up to 60 Steps
  • Constant Current / Constant Voltage
  • Automatic Potential Control
Rectifying Element
  • Selenium
  • Silicon
Input Supply
  • 240V single phase
  • Up to 660V three phase
  • Current __A
  • Voltage __V
Additional Features
  • GPS Synchronous Current Interruption
  • Data Logging of Output Voltage, Current and Reference Cell Potential
  • Remote Monitoring and Control via Internet, Satellite, GSM Cellular, or RS232/RS485 network
  • Trip Alarms for
    • Output Voltage
    • Output Current
    • Reference Electrode Potential
    • AC Input Voltage
    • Phase Failure
  • A.C. and D.C. lightning arrestors A.C.
  • Pilot light D.C. failure light D.C. fuse
  • Arrestor only Communications filter
  • Efficiency filter (choke) Meter switches
  • Output Voltmeter & Ammeter 90°Scale
  • Input Voltmeter & Ammeter 90°Scale
  • Potential Meter 90° Scale
  • Hours Run Counter
  • Kilowatt Hour Meter
  • Meter Monitor Sockets (4mm)
  • Input MCB
  • External isolator
  • Surge/Lightning Arrester DC
  • Surge/Lightning Arrester AC
  • Input RCD / ELCB
  • Door Interlocked Isolator
  • Over Temperature Trip
  • Anti-Condensation Heater & Switch Rectifier Fuses
  • Smoothing / Efficiency Circuit
  • RFI Suppression Filters
  • Auxilary AC Socket (to suit client requirements)
  • Output Termination
  • Output Protection
Tank Fittings
  • Oil Level Gauge
  • Oil Filling Pipe
  • Oil Drain Valve
  • Breather – Silica Gel
  • Skid Under Base
  • External / Earth Bolt
  • Sunshade
  • ID Label
  • Rating Plate
  • Dial Type Thermometer
  • Anchor Bolts
  • Lifting Lugs
  • Meter Viewing Window
  • Padlock Facility
  • Hinged Lid
  • Lid Toggle Latches
  • Cable Entry
  • First filling of Oil to BS148/IEC296
  • Laminated Circuit Diagram
  • Operation & Maintenance Manual

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