Instrument Transformers

Instrument transformers are high accuracy class electrical devices used to isolate or transform voltage or current levels. The most common usage of instrument transformers is to operate instruments or metering from high voltage or high current circuits, safely isolating secondary control circuitry from the high voltages or currents. The primary winding of the transformer is connected to the high voltage or high current circuit, and the meter or relay is connected to the secondary circuit.

Instrument transformers may also be used as an isolation transformer so that secondary quantities may be used in phase shifting without affecting other primary connected devices.

Following is the summary of the instrument transformer range that LPINZ currently offer to New Zealand and Pacific Island region:

  • Gas SF6 insulated for mounting in GIS up to 145 kV (current and voltage)
  • High voltage: oil-immersed up to Um 765 kV (current, voltage-inductor, voltage-capacitor, combined)
  • Medium voltage (up to Um 40,5 kV): oil-immersed (current and voltage); epoxy resin cast (current and voltage)
  • Low voltage, epoxy resin cast up to 1 kV
  • Special (test transformers, special requirement voltage and current transformers)


KONČAR ELECTRICAL INDUSTRY INC. – CURRENT AND VOLTAGE TRANSFORMERS, AUSTRALIA REFERENCE SITE

KONČAR ELECTRICAL INDUSTRY INC

 

123 kV COMBINED INSTRUMENT TRANSFORMER145 kV CURRENT AND VOLTAGE TRANSFORMERS
IT-7IT-3
245 kV CURRENT AND COMBINED INSTRUMENT TRANSFORMERS AND
550 kV VOLTAGE, COMBINED AND CURRENT INSTRUMENT TRANSFORMERS
760 kV TESTING TRANSFORMER
IT-5IT-4
420 kV CURRENT INSTRUMENT TRANSFORMER750 kV CURRENT TRANSFORMERS
IT-2IT-6

coupling capacitorCoupling Capacitors

AGUAGU Current Transformers
VAUVAU Combined Transformers
VCUVCU Capacitor Voltage Transformers
oil immersedMV Oil Current Transformers
VPTVoltage Power Transformers
VT-type-VPUVPU Voltage Transformer

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