Gate Motor Capacitor – What It Does and How to Replace It
What is the purpose of a start capacitor in gate operators?
Without a capacitor, the motor will not start on its own. The capacitor gives the motor the power it needs to start moving. At start-up, it creates a phase shift needed to generate torque in the motor’s magnetic field.
How the operator behaves if the capacitor is faulty: If the capacitor is wired incorrectly or damaged, the motor will only “buzz” (hum) and overheat, but the gate leaf will not move (or you will have to push it manually to get it moving).
How to replace the capacitor:
If the capacitor is in a standard articulated-arm operator, you can replace it like for like in the same way it is wired under the motor cover.
If it is an underground operator, you can choose whether to replace the capacitor like for like directly at the motor or place it in the control box next to the control unit. You can see a clear demonstration here:
