Portable Shorting Switches

Watteredge's patented matrix design Portable Shorting (Jumper) Switches utilize vacuum contact modules and incorporate solid state control logic for programmed switch opening and closing. 70kA through 250kA designs are available.

The matrix shorting switch utilizes a number of current-carrying elements, each containing a vacuum contact module and a pneumatic actuator. The switch elements are arranged in a patented matrix configuration, which minimizes the stored inductive energy during switch opening. For the opening sequence, the conductor elements open first, followed by the designated sacrificial positions. The resistor elements are the last to open, dissipating the industive energy after opening the switch conductor elements. This entire sequence occurs in less than 0.5 second. The designated conductor sacrificial elements require periodic replacement after 250 operations at full load.

Each element is actuated by an individual valve-in-head pneumatic cylinder. The elements are controlled by a solid-state logic sequencer which provides the delays for the interruption elements.

Matrix Switch Designs

Slim Line™ Jumper Switch

Portable Vacuum Contact Technology - Fixed-Switch features:

Switch-to-Cell Interface Option

• Flexible, water-cooled, copper cables or semi-rigid, copper arms for 38kA and greater ampacity requirements, with remote, contained, water flow sump system.
• Convection cooled below 38kA.
• Rotating arm assemblies, water-cooled for 38lA or greater ampacity requirements, with remote, contained, water flow sump system.

Service Alarm Systems Options

• Overtemperature warning alarm
• Loss of water flow alarm
• Loss of air pressure alarm
• Switch Closed (shorted) / Open Indicator
• Redundant alarm indication

Switch Transport System Options

• Wheel Transport
• Crane/Monorail Transport
• Lift Truck Channel