Thermal relay normally open contact for
Often open in series fault alarm bell or alarm lights or other devices can produce self-locking, thermal relay an action normally closed to open. Normally open to become closed,
Normally closed is in series in the control line, the thermal relay an action, normally closed on the disconnect, control the line to power, AC contactor on the power release, thus protecting the motor.
then not only electrical equipment to stop, at the same time, the alarm also start up. Understand
