Circuitry for mechanical brakes
|230 V~, 400 V~|
Usable in series
|K400, K400D, K570, K590, K700, K900, K2000/single-phase, K2000/three-phase, K3000/single-phase, K3000/three-phase, K3500, K4000, special housing|
|Single-phase motor with mechanical brake K700|
|Three-phase motor with mechanical brake K900|
|Three-phase motor with mechanical brake K3000|
|Brake release in K3000|
When the motor is switched on, the operating coil is activated and releases the brake. The mechanical brake remains activated until the motor is switched off (spring-operated brake). The voltage supply to the operating coil is disconnected simultaneously, initiating the braking operation. Many mechanical brakes work with an operating voltage of 230V; a connection facility has to be provided, therefore, specially for 400V threephase a.c. motors which generally require no directly earthed conductor. In this case we design the motor lead accordingly.
Additional requirement: Brake release
The electro-mechanical brake can be equipped on request with a brake release circuit. This is necessary, for example, in order to adjust or replace knives on planing shafts. A pushbutton or rotary button integrated in the switch is required to release the brake magnet to enable the knife shaft to be turned to the required position. A delay circuit which prevents releasing of the brake until the motor has stopped is used to ensure that switching off the motor and operation of the brake are still performed safely.