The components called brakes are suitable to guarantee a maximum of three connection systems, thus enabling slow, medium and fast braking. When it comes to medium braking, a contact is placed to pause the power supply of the rectifier bridge in the circuit. It must be an auxiliary contact of the contactor itself or the magnetic key of the motor, ensuring that the brake is switched on or off with the motor in the same moment.
In rapid braking, we must insert the break contact directly into one of the coil feed wires. Thus, at the moment the motor is driven in the network, the coil must be correctly fed and the armature placed against the electromagnet shell, gaining the resistance of the springs. When they are free, the inserts move axially in their housings, being able to separate themselves from the friction surfaces. Boston Gear HF-12CG
Thus, the braking action ends, allowing the motor to break freely and when the motor is de-energized from the mains, the control will need to instantly stop the coil current, causing the electromagnet to stop operating. At slower braking the brake coil rectifier bridge power supply must be made directly from the motor terminals without any pause.