ABB SGF, Instruction Manual

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2. Function
2.1 Disconnector
Electrical isolation of parts of networks
High-voltage disconnectors are used for the electrical isolation of electrical high-voltage networks.
When switched off, they form a visible isolation distance. High-voltage disconnectors are switched
under no-load conditions. Small capacitive or inductive currents, of the kind that occur during the
discharge of disconnected overhead-line or cable sections, are controlled.
Outdoor installation and formation of groups
The type SGF two column rotary disconnector described in these service instructions is a single - pole
disconnector for outdoor installation. Two or three poles can be coupled to form a group.
Standards
The type SGF two-column rotary disconnector conforms to the following standards :
l
IEC 62271-102 (2001-12) & IEC 60694-(2001-05)
l
DIN/VDE 0670 Part 2/Oct 1991 and Part 1 000/Aug 1984
2.2 Earthing Switch
Earthing and short-circuiting
In order to earth and short-circuit switched-off parts of plant, it is possible to mount one or two earthing
switches per pole.
2.3 Variants
Selection of variant of client
The type SGF two-column rotary disconnector is available in a wide range of variants. These service
instructions are valid for all variants. The information on the different variants is structured in such a way
that a clear distinction can be made.
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