Loadbuster® Tool
Loadbuster is the original lightweight, easy-to-use portable loadbreak tool for use with disconnects, cutouts, power fuses, and fuse limiters. It brings load-switching capability through 34.5 kV and 600 amperes nominal, 900 amperes maximum to your overhead distribution system.
Loadbuster cuts installation and operation costs. There’s no need for load interrupters on each device. Switching procedures are simplified too . . . minimizing the duration and scope of outages. This rugged, reliable device interrupts with no external arc, meeting OSHA requirements for opening circuits under load.
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Features
Lineman-proven since 1956 . . . the ultimate in portable live switching
- Available in two system-matched models
- 14.4/25 kV nominal, 27 kV maximum
- 25/34.5 kV nominal, 38 kV maximum
- Interrupts with no external arc. Meets OSHA requirements for opening circuits under load
- Handles all live-switching duties — transformers, lines, cables, and capacitors . . . through 38 kV, 900 A
- Rugged, reliable. Loadbuster’s robust, low-maintenance design stands up to the most demanding use . . . up to 2000 operations between inspections
- Operation counter feature tracks tool use, helps determine maintenance needs
- Cuts installation and operation costs. No need for interrupters on each device . . . simplified switching procedures minimize duration and scope of outages
- Total factory support. Loadbuster and replacement parts available for immediate delivery . . . S&C’s Loadbuster Tool Workshops show you how to maintain your Loadbuster tools
S&C’s Loadbuster Tools are manufactured in accordance with a quality system certified to ISO9001:2000.
Certain application restrictions apply, especially with regard to single-pole switching of ungrounded-primary three-phase transformers or banks of single-phase transformers. See S&C Publication 811-30 for details.
Operation
1. Providing current path
Loadbuster provides a current path between upper contact and pull ring of disconnect, cutout, power fuse, or fuse limiter — indicated by solid red line.
2. Extending Loadbuster
When Loadbuster is extended by a firm, steady downward pull on the universal pole, the associated device is opened, current is diverted through the tool — along the current path represented by the solid red line — and the operating spring is charged. At a predetermined point in the stroke, the trigger trips, releasing the charged spring to effect high-speed separation of the moving contact from the stationary contact.
3. Interrupting circuit
Current is positively interrupted by rapid elongation of the arc confined within the arc-extinguishing chamber, and by the efficient deionizing action of gases yielded by surrounding materials of the trailer and liner. Resetting latch retains tool in the open position, until released to reset Loadbuster for the next operation.
Construction
