Individual circuit without quick-discharge resistors

Individual circuit with quick-discharge resistors

R1 discharge resistors fitted in capacitor

R1 discharge resistors fitted to contactor

Double actuator

For connection of further control circuit devices: → section Control circuit devices for star-delta starting

In the case of actuation by means of power factor correction relay, check that this has sufficient power to actuate the contactor coil. Interpose a contactor relay if necessary.

Pushbutton I actuates contactor Q11, which picks up and maintains itself via its own auxiliary contact 14-13 and pushbutton 0. Capacitor C1 is thus energized. Discharge resistors R1 are not active when contactor Q11 is energized. Actuation of pushbutton 0 effects de-energization. Normally closed contacts Q11/21–22 then switch discharge resistors R1 to capacitor C1.