GROUNDING SWITCHES

Robust & Reliable

EMSPEC offer a wide range of grounding switches from 15kV to 550kV.

All EMSPEC ground switches are built on the keep it simple principle, through innovative design to provide high performance and reliability. Only the best materials are used for its fabrication.

All parts are fabricated from extruded aluminum or machined from solid billet materials, such as 304 stainless steel and hard drawn copper.

NO CASTINGS

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Technical features

High strength hot dip galvanized structural steel base frame;
Maintenance-free dry lubricant bearings;
Hardware on live parts are made of non-magnetic materials(mainly stainless steel);
Contacts are made of silver plated hard drawn copper;

Alternatives

All ground switches may be provided as stand alone or combined with one of our various range of disconnect switches. Parralelle or perpendicular motion to the main switch base frame is available

Image on the left shows an ST18503 with the 3 blades contained within the support structure girder . The center image shows the same ST18503 model combined to a 145kV double end break D.S.. The motion of the ground blade is paralelle to the base frame of the main switch. The image on the right shows a GSA36135 double motion perpen- dicular grounding switch.

Type EM	ST18501	ST90	GSA	ST18503	STE2
15 kV	x	x
27 kV	x	x		x
38 kV	x	x		x
44kV	x	x		x
72.5 kV		x	x	x
123 kV			x	x
145 kV			x	x
170 kV			x	x
245 kV			x	x	x
300 kV			x	x	x
362 kV			x	x	x
420 kV				x	x
550 kV					x

EMSPEC range of grounding switches are available for short circuit withstand current from 12,5 to 90kA rms-s. Please consult an EMSPEC representative to help you select the right GS for your application.

Configurations and Options

Parallel or perpendicular grounding switch
Manual or motor operator
Arcing contacts
High speed whip
Vaccuum interrupter
Silver inlays or silver plating

This brochure provides a brief introduction. EMSPEC reserves the right to make changes at any time, without notice.