Centre-Break Disconnectors type SGF
Centre-Break Disconnectors type SGF
Disconnectors type SGF are used for metallic isolation of systems by creating in open position a visible isolating distance. They are appropriate for switching small currents or currents when no significant change in voltage occurs across the terminals. Two-column rotary disconnectors can be operated in many types of high voltage switchgear that are in use. For earthing and short-circuiting disconnected plant sections, each disconnector pole can be equipped with one or two earthing switches.
Optionally each disconnector can be equipped with one or two earthing switches. The SGF disconnectors comply with publication IEC 62271-102; IEC 62271-1 and most other national regulations.
Rated voltage: 36 – 550 kV
Rated normal current: 1600 – 4000 A
Rated short-time withstand current: 40 kA – 63 kA
- Durable, low‑maintenance design
- Proven global reliability
- Easy installation and configuration in the field
Key features of our Centre-Break Disconnectors type SGF
The current path halves are welded aluminium structures with a minimum number of terminal points that are subject to corrosion; thanks to that no appreciable change of the contact resistance over many years.
Contact fingers without external springs.
They guarantee that the deflection remains unchanged at high static mechanical terminal loads.
Disconnectors for operations under severe ice conditions up to 20 mm ice thickness are available.
For all operating mechanisms. It ensures no change of the switching position in case of extreme external influences such as storm, vibration and earthquake.
Owing to the selection of the material used and the encapsulation of the pedestals and rotary heads in connection with a permanent lubrication, the units are practically maintenance-free.
A Century of Power
Installation and maintenance
At Hapam, we are committed to ensuring long‑term reliability and performance for every high‑voltage disconnector and earthing switch we deliver. Our equipment is designed for durability, easy installation and minimal maintenance, but ageing grid infrastructure can introduce new challenges over time. That’s why we provide fast, efficient retrofit solutions, global service support and access to expert technicians across all regions. From spare parts and installation guidance to testing, technical assistance and emergency repairs, our service organization is ready to support you throughout the entire lifecycle of your equipment.
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We design and manufacture reliable high‑voltage disconnectors and earthing switches used worldwide. Whether you need technical advice, a custom configuration or full project support, we are here to assist you.