Disconnector and Earthing Switches 3D

Disconnectors are used for no-load closing and opening operations. Earthing switches earth isolated circuits.

Description
Technical Data
Dimensions

Disconnectors are mainly used to protect personnel when working on equipment. This is why they have to be highly reliable and safe in operation. Indoor switch-disconnectors from Siemens are particularly notable for their intelligible modular system with all essential attachments such as fuses, (make-proof) earthing switches, motor-operated mechanism, shunt release and auxiliary switch.

Disconnectors and earthing switches are suitable for indoor installations up to 36 kV. Due to their cast-resin ribbed insulators, the disconnectors and earthing switches can also be used with high air humidity and occasional condensation, e.g., in tropical areas. The devices are protected against corrosion. Steel parts are either galvanised and yellow-passivated, or electrostatically coated with epoxy-resin powder over a phosphate layer. The switching devices can be installed in any position with horizontal shaft. Designs for installation with the shaft in vertical position are also available.

Disconnectors 3DA/3DC

Earthing switches 3DD/3DE

Product range overview
Rated voltage (kV)	Rated short-time withstand current (kA)	Rated normal current (A)
Rated voltage (kV)	Rated short-time withstand current (kA)	Without	630	1250	1600	2500	3000
12	20	▲	■
	31,5	▲	■	■	■	■
	50	▲		■	■	■	■
	63	▲		■	■	■	■
24	20	□ ▲	● ■
	31,5	□ ▲		● ■	● ■	■
36	20	▲	■
	31,5	▲		■		■	■