Instrument Transformers

An instrument transformer’s role is to provide accurate inputs to protection, control and metering systems including revenue metering.

The main tasks of instrument transformers are:
  • To transform currents or voltages from a usually high value to a value easy to handle for relays and instruments.
  • To insulate the metering circuit from the primary high voltage system.
  • To provide possibilities of standardizing the instruments and relays to a few rated currents and voltages.

Our offering

  • Current Transformers

    The primary winding in a current transformer is incorporated in the line and carries the current flowing in the network. The magnitude of the secondary current is dependent of the ratio of the transformer.

  • Combined Current/Voltage Transformers

    Above a service voltage of 110 kV, instrument transformers are frequently manufactured as combined current and voltage transformers.

  • Coupling Capacitor

    Coupling capacitors types CCA (standard capacitance) and CCB (extra high capacitance) are intended for power line carrier applications.

  • Voltage Transformers

    ABB outdoor voltage transformers are single-phase design and intended for connection between phase and ground in networks with insulated or direct grounded neutral points.

  • Station Service Voltage Transformers

    SSVTs combine the characteristics of a VT with the power rating of a distribution transformer

Related products

Instrument Transformers < 40.5 kV

for installation in MV switchboards


for all kind of applications according ANSI, IEC and other local standards. (power transformers, distribution transformers, industrial transformers....)

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    ABB contact for United States of America


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