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Loadbuster Disconnects^®

Loadbuster Disconnects, when used with 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 Disconnects are manufactured in accordance with a quality system certified to ISO9001:2000.

FEATURES
RATINGS
OPERATION
STYLES
PRODUCT SUPPORT

Features

Loadbuster Disconnects 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 Disconnects—Overhead Pole-Top Style are also available with composite-polymer silicone insulators.

Ratings

Branch Feeder, Main Feeder, Crossarm, and Station Styles
50/60-Hz Ratings					Disconnect Gap
kV			Amperes, RMS		Disconnect Gap
Nom.	Max	BIL	Cont.	Mom., Asym.	Inches	mm
14.4	15.5	110	600	40 000	8	203
					10-7/8	276
					10	254
			900	40 000	7-1/2	191
			900	40 000	10	254
25	27	125	600	40 000	10-7/8	276
25	27	125	900	40 000	10-1/2	267
25/34.5	38	150	600	40 000	10	254
25/34.5	38	150	900	40 000	14	356
34.5	38	150	900	40 000	14	356
34.5	38	200	900	40 000	14	356

Overhead Pole-Top Style
50/60-Hz Ratings					Disconnect Gap
kV			Amperes, RMS		Disconnect Gap
Nom.	Max	BIL	Cont.	Mom., Asym.	Inches	mm
14.4	15.5	110	900	36 000	8	203
25	27	150	900	36 000	11	279
34.5	38	170	900	36 000	11	279

S&C’s tested value. Rating per ANSI: 150 kV.
S&C’s certified value. Rating per ANSI: 600A.

Operation

1. Attach

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

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

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.