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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.
High Voltage Equipment
Why use HAPAM disconnect switches?
- More than 75 years of experience
- Durable and reliable design
- More than 30,000 disconnect switches and grounding blades currently in service in more than 80 countries around the world
- Virtually maintenance-free.
Main blade
The main blade is made of an aluminum tube with silver-plated copper contacts at both ends. When the disconnect switch is closed, the main blade performs a two-step motion: first, the main blade lowers until it reaches a completely horizontal position, and then it rotates so that contact pressure is applied at both ends of the disconnect switch.
The main contacts feature an “inverted loop” design, which makes them suitable for very high short-circuit currents. Anti-corona shields are provided.
Grounding blades
Hapam disconnect switches can be equipped with grounding blades installed on the right and/or left side.
The grounding blade consists of an aluminum tube fitted with silver-plated contacts at both ends.
The grounding blade consists of an aluminum tube fitted with silver-plated contacts at both ends.
Types of disconnect switches:
- SSBII Center-Break Disconnector
- SSBIII Double-Pole Disconnector
- VSSBIII Vertical-Opening Disconnector
- VKSBIII Semi-Pantograph Disconnector
- GSSB Pantograph Disconnector
- TEB-Type Grounding Blades
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 245 -550 kV range. 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