Instrument Transformers

Pfiffner - A Leading Provider in the Electrical Power

PFIFFNER is a values-driven Swiss company with:
o over 85 years of experience and an enormous amount of know-how o long-lasting partnerships with customers and suppliers o a high level of vertical integration to control all key processes in-house o Swiss quality - from development right through to delivery Total customer satisfaction is our goal. With many years of experience and technical expertise we can provide the right solutions to meet all our customers’ needs. Wide range of instrument transformers for voltage levels up to 550 kV. Thanks to our strong presence in international markets and our close contact with customers PFIFFNER – the symbol of unique quality Wide range of products insulated with oil-paper or SF6 offers our customers an optimal choice of high-quality instrument transformers with a long lifetime. Our voltage and current transformers are hermetically sealed. All products have a high level of safety against explosion hazards and meet the latest international standards. They all have aluminum casings and are available with silicone composite ( LSR ) or for oil-paper insulated transformers with porcelain ( C130 ) insulators if requested. All instrument transformers are available with various creepage and arcing distances. Because of the very close cooperation with our customers, we achieve optimized solutions which are used worldwide. As a result of continuous development in our R & D department, we can offer products with the latest and state-of-the-art design.

High Voltage
Instrument
Transformer

Wide range of products insulated with oil-paper or SF6 offers our customers an optimal choice of
high-quality instrument transformers with a long ifetime up to 550kV.

Current Transformers

• Oil-paper insulated
• Simple primary winding changeover
• Explosion-tested casing
• Fine-graded bushing
• Generously-sized terminal box

Voltage Transformers (Inductive, Capacitive)

• Oil-paper insulated
• Upgradable for the transmission of high-frequency signals
• No on-site adjustment is necessary
• Increased security against relaxation oscillation
• Multi-level primary capacity

Combined Transformers

• Oil-paper insulated
• Guaranteed accuracy over entire service life
• Explosion-tested casing
• Fine-graded bushing
• Low space requirements for installation

Diagnosis Measurement System

Surge arresters for High Voltage applications up to 800 kV, SB series with porcelain housing, series SBK, SBKC and SBKT - three designs with silicone housing

Resistive Capacitive Voltage Divider

• Gas insulated
• Protection and measurement in high-voltage transmission
• Can be used for the measurement of mains quality
• Highest accuracy from DC up to 10 kHz