Based on the principal of ‘zero' voltage turn-on and ‘zero' current turn off for capacitors, these switches are manufactured with thyristors in ‘R' and ‘B' phases. Switching times of 40 mili-seconds is possible with these switches.

These switches are supplied with heat-sinks for thyristors, and plug-in type control cards, which are very easy to replace. Entire range from lowest kVAR to 100-kVAR @ 433 V of capacitors for single step is available.