• G. Nandy & Co.
  • An ISO 9001-2008 Certified Company Manufacturer of H.V. Isolators A.B. Switfches D.O./ H. G. Fuses

H.T. Isolating Switch Type:SIHI-D10, 11kV, 800A

The 11kV triple pole manually operated isolating switch is designed for indoor application and rated for 800A. The switch can be directly mounted on walls, structures of in switchboards.



Salient features :

  • 1. Turn & Twist type contacts for crating high pressure contacts for higher current rating.
  • 2. Manual reduction gear or motor operating mechanism.
  • 3. Straight banging type contacts with Manual lever operating mechanism for low current rating.
  • 4. Vertical of horizontal terminal take-off arrangement.
Highlights Technical Details    

1. Compact in dimension
2. Epoxy insulation ensuring     maintenance/breakage free     insulators.

3. Sturdy design of current     carrying parts.

4. Specially designed contacts     and blades prevent self     opening of switch under     short circuit conditions.

5. Availability of link drive/Aux.     switch for switchboard     operation/electrical     indication and interlock     purpose respectively.		 Type reference
Rated voltage
Rated frequency
Rated Current at 400C
Reference standards 
Operation
Rated short time current for 1 Sec.
Admissible impulse short
Circuit current
Insulation Level
P.f. withstand voltage
Impulse withstand voltage
Max. torque requied at the shaft Accessories

: SIHI-D 10-III-800A
: 12kV
: 50Hz
: 800A
: IS:1818
With switch rod or link drive for front of board operation
: 26.2 kA*

: 66kA (peak)

: 35kV (to earth) &
  45kV (Across open switch)
: 75 kV (to earth) at 1.2/50
Micro sec. surge and 
85 kV (across open switch) 10 Kgm.

Aux. switch (2NO + 2NC)
*For short circuit duration ‘t’ between 1 & 5 secs. Multiply the 1 sec. currently by 1/ √t.

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235, Netaji Subhas Road, Howrah - 711 101 (W.B.).   Phone: (033) 2667-6241   |   Fax:(033) 2667-6241