PTS WN3B Automatic Transfer Switches

Automatic and reliable transfer of mission-critical loads for business continuity.

PTS Low-Voltage (LV) Automatic Transfer Switches

Intelligent Bypass-Isolation Transfer Switches

Inspect, test and maintain power transfer switches without any power interruption. PTS WN3B is a series of Closed Transition Transfer Switches that delivers closed transition overlapping of sources in less than 100 milliseconds. It thrives on its capability to transfer in a closed transition mode when both sources are within the specified parameters.

Maximum reliability and operating life

PTS-WN3B Series switches are positively locked, making it unaffected by momentary outages. This allows contact pressure to be maintained at a constant value as well as contact temperature rise to be minimised for maximum reliability and operating life. When a source is not within specified limits such as during a power failure, PTS-WN3B series operates in a delayed transition mode.

Fully-rated bypass switch

Designed to use as a manual 3-position transfer switch

Simple bypass and isolation functions

Bypass and isolated handles for seamless transferring of loads

Ease of maintenance

Located on a draw-out mechanism to facilitate maintenance easily

Maximum performance

Driven by a reliable and field-proven solenoid operating mechanism

FEATURES

Bypass and transfer switches have identical electrical ratings
Bypass contacts only carry current during bypass mode
Mechanical indicators for bypass and transfer switch positions
Electrically operated and mechanically held transfer switch
Mechanical and electrical interlocked switch
Front replaceable main and arcing contacts
High withstand and close-on
Arc quenching grids, enclosed arc chambers, and wide contact air gap
Segmented silver tungsten alloy contacts with separate arcing contacts on all sizes
Switch position indicators and true source acceptability lights
Standard ground conductor connections
Four auxiliary contacts featuring 2 closed contacts during an emergency position and 2 closed contacts during a normal position
Accessible components for inspection and maintenance without removing the switch or power conductors
Local/remote serial communications capability for interfacing with PTS-WN3B communication product
Delayed Transition PTS-WN3B Series has 3 positions: conventional two-position transfer configuration, plus closed and delayed transition modes of operation All configurations are available with either automatic or non-automatic control
Overlapping neutral conductor (optional)