AC High Voltage Test

  • For Power Transformers WV for factory tests and WV for onsite tests. The tests include: Induced AC voltage test, Measurement of no-load loss and current, Measurement of load loss and short-circuit impedance, Temperature-rise test.

The system uses the static frequency converter with frequency range 40-200 HZ and carries out tests implementing the precise waveform with a total harmonic distortion (THD)<5% and a partial discharge (PD) noise level < 10 PC <20 PC for onsite model).

Transformers with powers up to 1 GVA can be tested

For distribution transformers DiTAS test system is used.

  • DiTAS test system covers all necessary tests on distribution transformers. If it is equipped with optional motor-driven switches, the entire routine test sequence can be executed in a fully automated manner. This significantly cuts the test duration and makes it possible to fully integrate the test system into the manufacturing process.

They are used in the following applications:

  • Routine testing, type testing, and in particular, wet testing
  • Indoor and outdoor testing
  • On-site testing

Three types of the WP are available:

  • AC test system with insulating sheath transformers
  • AC test system with insulating sheath transformers
  • AC test system with GIS transformers

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DC High Voltage Test

Impulse Voltage and Current Test Systems

Impulse voltage test systems are available for impulse voltage testing of:

  • Cables
  • Transformers
  • GIS
  • Arresters
  • different high-voltage equipment.

The test systems generate in accordance with the international standards IEC (60060-1, 60076-3, 60840 & 62067, … etc.):

  • Lightning impulse voltage (LI, 1.2/50 µs)
  • Switching impulse voltage (SI, 250/2500 µs)
  • Chopping lightning impulse voltages (LIC, front time 1.2 µs, front, crest or tail chopped)

Impulse Voltage range:  up to 5,700 kV (LI) and up to 4,500 kV (SI)

Impulse voltage and current measurement be achieved by the digital transient recorder, type HiRES. In addition to recording and storing the impulse voltages, all parameters (peak value, rise time, fall time, … etc.) are measured and recorded.

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Module Test Systems For Student Training and Research

Measuring Systems

  • AC capacitor, type WC (main component of HV divider WM)
  • Compressed gas standard capacitor, type MCP
  • Damped capacitive voltage divider, type SMC
  • Damped capacitive reference voltage divider, type SMC…ref
  • Controlled resistive lightning impulse reference voltage divider, type SMR…ref
  • Universal resistive/capacitive reference voltage divider,
    type MCR…ref
  • High-ohmic resistive reference voltage divider, type GMR…ref

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  • Digital Recorder HiRES
  • Transformer loss measuring system type LiMOS
  • PD measurement equipment
  • Measuring sphere spark gaps
  • Impulse current shunts
  • AC measurement device
  • HiCOS control system with expandable modular design

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