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High-Voltage Reactor​

The LSTHR series dry-type iron core series reactors are important auxiliary equipment for power system reactive power compensation devices. When connected in series with power capacitors, the dry-type iron core reactors effectively suppress high-order harmonics in the power grid, limit inrush current and operation overvoltage, improve the voltage waveform of the system, and enhance the power factor of the grid. This plays a significant role in ensuring the safe operation of power capacitors and other electrical equipment.

Main Features

  • The core of the dry-type iron core series reactor is made of high-quality silicon steel sheets, with the core column divided into uniform small sections by multiple air gaps. The air gaps are insulated using epoxy cloth boards to ensure that they remain unchanged during long-term operation of the reactor.
  • The end faces of the core are bonded with high-quality silicon steel sheet end face glue, securely combining the silicon steel sheets, which greatly reduces operational noise and provides excellent moisture and dust resistance.
  • The coils are made of pure copper and designed for dry-type H-class insulation. The coils are impregnated with H-class solvent-free varnish under vacuum pressure and then further coated with external insulating varnish. This process ensures excellent insulation properties, high mechanical strength, and the ability to withstand large current impacts and thermal cycling without cracking.
  • The external insulating varnish has strong hydrophobic properties and low partial discharge, allowing the reactor to operate safely in harsh environmental conditions.
  • The dry-type reactor is smaller, lighter, more compact, and simpler in structure compared to oil-immersed reactors, hollow reactors, and epoxy cast reactors. It is also easier to install.

Applications

Power system reactive power compensation devices.
When connected in series with power capacitors.

Technical Data

  • The altitude should not exceed 2000 meters.
  • The operating ambient temperature range is from −25° C to +45° C, and the relative humidity should not exceed 90%.
  • The surrounding environment should be free of harmful gases and flammable or explosive materials.
  • There should be good ventilation in the surrounding environment.
  • Special operating conditions can be designed upon request.
  • Its temperature rating reaches Class H (with a maximum temperature rise of 90K for both the core and windings during normal operation at 180° C).
  • The dry-type reactor can operate continuously at 1.35 times the rated current.
  • The noise level of the dry-type reactor does not exceed the national standards of China.