Disconnectors are primarily used as mechanical switching devices which provide in the open position, an isolating distance.
Modular switch disconnectors feature a robust mechanical construction that enables them to perform reliably in different installation position. Their high electrical ratings ensure operation even under heavy loading.
The Refair's 11-12 Kv Disconnector is a Three-phase, hookstick-operated disconnector used to sectionalize or isolate circuits on electrical distribution systems . The distribution switch can be mounted on a single or double crossarm and is rated for 600 or 900 A continuous current and 65 kA peak withstand current (40 kA momentary). It is designed for Medium Voltage Outdoor Distribution systems Operation .
Disconnectors and earthing switches are used to protect personnel while working on operational equipment and must therefore be very reliable and operationally safe – even under adverse climatic conditions. Disconnectors and earthing switches are offered as a combination of both.
Wide operating temperatures range
High number of breaking operations at rated current value
Compact dimensions supporting indoor applications
Earthing switch with making capacity
Reliable position indication
Capability for application with frequent switching requirement
Ability to close at high short circuits currents in cooperation with current limiting fuses
Work in horizontal and vertical position
Cost efficient solution for transformers and line protection