Instrument Transformers are an essential link for the safe and efficient operation of transmission networks. They provide accurate and reliable current and voltage measurements for secondary equipment such as meters, protections relays, bay computers and other devices.

GE has manufactured tens of thousands high voltage instrument transformers. Our customers recognize our top-of-the-line products for their long term robustness, safety and reliability.

GE offers a comprehensive range of instrument transformers up to 1,200 kV including Current Transformers, Magnetic Voltage Transformers, Combined Metering Units, Capacitor Voltage Transformer, GIS Voltage Transformers and Power Voltage Transformers.

Current Transformers
	OSKF Oil-Insulated Current Transformers up to 800 kV GE’s OSKF have been designed for a 30-year lifetime and, thanks to the profound technical concepts, many well out-live this service life. The oil is hermetically sealed from the air by a stainless-steel diaphragm assembly and all external parts are of corrosion-resistant material. More Info
Voltage Transformers
	OTEF Oil-Insulated Voltage Transformers up to 420 kV GE manufactures a complete range of high voltage oil-filled voltage transformers (VTs). The OTEF is a tank-type potential transformer with post insulator. Thousands voltage transformers are in service worldwide, in all types of climates and under the most severe conditions. More Info
Combined Metering Unit
	KOTEF Oil-Insulated Combined CT/VT up to 420 kV KOTEF utilizes the same components as the individual CTs and VTs. Both transformers are combined in a single metering unit and are available in porcelain or composite. The KOTEF combines the advantages and design features of the OSKF and OTEF lines. More Info
Capacitor Voltage Transformers
	OTCF Coupling Capacitor Voltage Transformers up to 800 kV In high and extra high voltage transmission systems, capacitor voltage transformers (CVTs) are used to provide potential outputs to metering instruments and protective relays. In addition, when equipped with carrier accessories, CVTs can be used for power line carrier (PLC) coupling. More Info
	CCV Capacitor Voltage Transformers and CC Coupling Capacitors up to 800 kV In high and extra high voltage transmission systems, capacitor voltage transformers (CVTs) are used to provide potential outputs to metering instruments and protective relays. In addition, when equipped with carrier accessories, CVTs can be used for power line carrier (PLC) coupling. More Info