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Loadbuster Disconnect Switches, when used with the Loadbuster tool, S&C’s portable loadbreak tool, provide the ultimate in low-cost, universal live switching. They offer the operating flexibility of a system with multipoint interrupter switches . . . without the cost associated with building an interrupter into every switch.

S&C’s Loadbuster Disconnect Switches are manufactured in accordance with a quality system certified to ISO9001:2000.

Loadbuster Disconnect Switches are:

  • Unexcelled as a straight disconnect: With their rugged station-type reliability, they accommodate the prevailing heavier loads and higher fault currents.
  • When used with Loadbuster, they not only can switch load currents through 900 amperes at distribution voltages up to 34.5 kV, but can also break associated transformer-magnetizing currents, line-charging currents, and cable-charging currents.
  • Loadbuster Disconnect Switches—Overhead Pole-Top Style are also available with composite-polymer silicone insulators.

Branch Feeder, Main Feeder, Crossarm, and Station Styles

50/60-Hz RatingsDisconnect Switch 
Gap
kVAmperes, RMS
Nom.MaxBILCont.Peak
Withstand
Inchesmm
14.4 15.5 110 630 65 000 8 203
10-7/8 276
10 254
900 65 000 7-1/2 191
10 254
25 27 125 630 65 000 10-7/8 276
900 65 000 10-1/2 267
25/34.5 38 150 630 65 000 10 254
900 65 000 14 356
34.5 38 150 900 65 000 14 356
200 900 65 000 14 356


Overhead Pole-Top Style

50/60-Hz RatingsDisconnect Switch
Gap
kVAmperes, RMS
Nom.MaxBILCont.Peak
Withstand
Inchesmm
14.4 15.5 110 630/900 65 000 8 203
25 27 150 630/900 65 000 11 279
34.5 38 170 630/900 65 000 11 279

 S&C’s tested value. Rating per IEEE: 150 kV.
 S&C’s certified value. Rating per IEEE: 630A.

1. Attach

Attaching Loadbuster Tool.

Reach across the front of the disconnect and attach Loadbuster’s anchor to the attachment hook on the far side of the device. Then engage its pull ring with Loadbuster’s pull-ring hook. Loadbuster’s pull-ring latch prevents inadvertent disengagement of the disconnect pull ring and Loadbuster’s pull-ring hook.

2. Pull

Pulling Loadbuster Tool downward.

A firm, steady downward pull on Loadbuster — to its maximum extended length — opens the disconnect in the normal manner as the current is diverted through Loadbuster. At a predetermined point in the opening stroke, Loadbuster trips, breaking the circuit positively.

3. Remove

Removing Loadbuster Tool.

Loadbuster is disengaged by first removing its anchor from the disconnect attachment hook. Then, with the blade in the open position, Loadbuster is removed from the pull ring with a simple “roll-off” motion.

Branch Feeder Inverted Style

Branch Feeder Inverted Style

Branch Feeder Vertical Style

Branch Feeder Vertical Style

Main Feeder Style

Main Feeder Style

Station Vertical Style

Station Vertical Style

Crossarm Inverted Style

Crossarm Inverted Style

Crossarm Vertical Style

Crossarm Vertical Style

Overhead Pole-Top Style

Crossarm Vertical Style

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