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ES 
DE 
COURSES
THEORETICAL AND PRACTICAL
We offer theoretical and practical courses for engineers and electrical technicians on electrical concepts and testing.
SERVICE OF
LABORATORY
We have a complete laboratory for calibration and repair of test instruments with which we provide after-sales support.
Current and Potential Transformers
Current Transformers for Outdoor Use
Current transformers are used in high-voltage networks in the range of 24 -550 kV. They transform high currents to standardized values for meters and protection and measuring devices.
Technical Characteristics:
- Paper-Oil and SF6 Gas Insulation.
- From 24 to 550 kV.
- Minimal oil volume, high grade mineral oil and PCB-free.Instrument transformers (CT/PT)
- The active part is located in the transformer head enclosure.
- Fine graduation nozzle.
- Stainless steel expansion bellows
- Ratio change through primary (optional Secondary).
- Housing explosion tested.
- Precise control of the electric field and prevention of local partial discharges through the fine graduated nozzle.
- Increased safety by preventing subsequent arching formation.
- High operational safety, as there are no live parts in the isolator.
Type
- JOF T (24 -123) kV Outdoor Use, insulated in Paper - Oil
- JOF (24 - 550) kV Outdoor Use, insulated in Paper - Oil
- JGF (245 - 550) kV Outdoor use, insulated in SF6 Gas
More information: www.pfiffner-group.com
Inductive Voltage Transformers for Outdoor Use:
Voltage transformers are used in high-voltage networks in the range 24 - 550 kV. They transform high voltage into standardized values for meters and protection and measuring devices.
Technical Characteristics:
- Paper-Oil and SF6 Gas Insulation.
- From 24 to 550 kV.
- Work in low induction
- Active part located in the inner enclosure of the transformer.
- Fine graduation nozzle.
- Stainless steel expansion bellows
- With open delta winding and damping unit, ferro-resonance can be minimized.
- Large secondary terminal box.
Type
- EOF (24 -245) kV Outdoor Use, insulated in Paper - Oil
- EGF (245 - 550) kV Outdoor use, insulated in SF6 Gas
More information: www.pfiffner-group.com
Capacitive Voltage Transformers for Outdoor Use
Voltage transformers are used in high-voltage networks in the range 24 - 550 kV. They transform high voltage into standardized values for meters and protection and measuring devices.
Technical Characteristics:
- Insulation Paper -Oil
- From 72 to 550 kV.
- Ferro-resonance free.
- Carrier Wave Coupling Capacitor (PLC)...
- Protected against sudden transient overvoltage surges on the high side
Type
- ECF (72 - 550) kV Outdoor Use, Insulated in Paper - Oil
- ROF (72 - 550) kV Resistive Divider Outdoor Use, Pape Insulated - Oil
More information: www.pfiffner-group.com
Combined transformers for outdoor use
Combined current and voltage transformers are used in high-voltage networks in the range 245 -550 kV. They transform high voltage into standardized values for meters and protection and measuring devices.
Technical Characteristics:
- SF6 gas insulation.
- From 24 to 550 kV.
- It combines all the advantages of current and voltage transformers.
- Guaranteed accuracy throughout the service life.
- Reduced transportation and installation costs.
- Requires less space for installation.
Type
- EJOF (24 - 170) kV Outdoor Use, Insulated in Paper - Oil
- EJGF (245 - 550) kV Outdoor Use, Insulated in SF6
More information: www.pfiffner-group.com