Transformer rectifier: Oil cooled

Standard oil immersed transformer rectifiers

The oil immersed transformer rectifiers are standard. Although the concept has been in existence for some time now, the design is still very current. This model of rectifier is known for its reliability and low maintenance operation, particularly in adverse climatological conditions, such as harbours/ports, deserts and tropical environments. 

Main advantages:
  • Useable for heavy-duty purposes
  • Completely sealed from environment
  • Requires low maintenance 
  • MTBF (Main Time Between Failure) is very high
  • Current up to 1500A at 55 oC environment
  • Voltage up to 500V

 

Our standard oil immersed transformer rectifiers can be build in every output range.

 

The Hellas standard has developed over of many years of experience and meets all the major IEC regulations (BS & DIN are based on IEC regulations):

  • EMC - IEC 61 000
  • Safety - IEC 60 204
  • Semiconductor converters - IEC 60 146
  • Documentation - IEC 60 617 
  • Classification protecting - IEC 60 529
  • Safety transformers - IEC 60 742
  • Power transformers - IEC 60 076
 
 
T/R unit including 2-way control enclosure and junction box

Specifications

Protection Performance of protection
Input 220 .. 480V - 50/60 Hz
  1 or 3ph
Control Manual – 63 step / Variac
  Automatic – Thyristor (Current, voltage and/or potential)
Output Voltage - Up to 100 Volt, (higher consult Hellas)
  Current - Up to 500 Ampere, (higher consult Hellas)
  Ripple – 5% for 63 step 3 phase, (others consult Hellas)
Rating Continues
Protection Overload – MCB or fuses
  Overvoltage – VDR (25 kJ 8/20 µs)
  Lighting – GDT (150 kA 8/20 µs) ‘Optional’
 Tank Material – minimal 2.5 mm sheet steel
  Coating – Zinc rich epoxy primer / epoxy finish/ topcoat
Control Material – minimal 1.38 mm stainless steel grade 304
  Protection class – up to IP 65
Cooling ONAN
Meter DC – voltage
  DC – current