Project Description

Get your offer


This solution was specially designed for heat run tests at transformers, transformer substations and low voltage switchboards according to the standards IEC 62271-202, IEC 60076, IEC 60439-1 and IEC 61439.

  • Transformer and Substation Heat Run Testing

  • For Transformers with up to 5MVA and 36kV

  • Substation, Transformer and Switchboard Test

  • LV Switchboard Test with up to 6300A


For transformer substations, transformers and switchboards heat run type tests under defined load conditions are needed.
A transformer substation heat run test requires the transformer, MV and LV switchboards to be tested at the same time with defined currents.
Two AC power supplies are needed, one high power supply for the MV switchgear and the transformer in short circuit and a high current supply for the LV switchboard.


A supply with very high power is needed. It must fit to different transformer power and voltage ratings.
The LV Switchboard needs to be supplied with 3-phase high currents up to 6300A.
Heat run test last often more that 48 hours, the temperatures at many points of the whole setup need to be recorded and monitored for certain limits.

Our Solution

The system consists of two power supplies,  two precision power analyzers and one 60 channel temperature data acquisition unit. All equipment is completely remote controlled from the control room via Ethernet.
The first power supply delivers up to 500kVA with voltage ranges  0…500/750/1000/1500/2250/3000V, which fit to the short circuit voltage requirements of typical MV transformers. The second power supply is specially suited for high current tests of the LV switchboard with up to 6300A.
The operation at the whole test field is protected by a configurable safety control and safety components according to EN 50191 to provide maximum safety for operators during every day work.

Technical Specifications
Power Supply 1 Sine Inverter Power Supply
3 phase AC 500kVA 50-60Hz
Power Supply 2 Sine Inverter Power Supply
3 phase AC 100kVA 50-60Hz
Power Measurement Precision Power Analyzer
Basic accuracy 0.1%
Current Sensors 1000A and 10kA
Voltage Sensor 3AC 8,4kVrms
Temperature Measurement Precision Data Aquisition Unit
60 Channels, J-Type thermocouple
  • 500kVA Sine Inverter Power Supply
  • 6300A High Current Power Supply
  • 2 Precision Power Analyzers
  • 60 channel  temperature  data acquisition unit
  • Safety equipment according to EN50191
  • Complete remote operation from control room
  • Customized Data Logging Software with limit monitoring
  • Power Supply  shutdown when limits exceeded
  • Consulting
  • Planning
  • Power Supply implementation
  • Software development
  • Commissioning on site
  • Operator training