Planning the electrical installation67Switching the motor power supply from drive to direct-on-line1. Stop the drive and the motor with the drive control panel (drive in the local controlmode) or the external stop signal (drive in the remote control mode).2. Open the main contactor of the drive with S11.3. Switch the motor power supply from the drive to direct-on-line with S40.4. Wait for 10 seconds to allow the motor magnetization to die away.5. Start the motor with S41.Switching the motor power supply from direct-on-line to drive1. Stop the motor with S42.2. Switch the motor power supply from direct-on-line to the drive with S40.3. Close the main contactor of the drive with switch S11 (-> turn to position ST fortwo seconds and leave to position 1).4. Start the drive and the motor with the drive control panel (drive in the local controlmode) or the external start signal (drive in the remote control mode).Protecting the contacts of relay outputsInductive loads (relays, contactors, motors) cause voltage transients when switchedoff.The relay contacts on the JCU control unit are protected with varistors (250 V)against overvoltage peaks. In spite of this, it is highly recommended to equipinductive loads with noise attenuating circuits (varistors, RC filters [AC] or diodes[DC]) in order to minimize the EMC emission at switch-off. If not suppressed, thedisturbances may connect capacitively or inductively to other conductors in thecontrol cable and form a risk of malfunction in other parts of the system.Install the protective component as close to the inductive load as possible. Do notinstall protective components at the relay outputs.
