The BUR brake controller combines the BGE control unit with an electronic voltage re- lay. The BGE control unit has a separate voltage supply because the voltage at the motor terminal board is not constant (motor operated on frequency inverter). With a cut-off in the AC circuit, the UR.E voltage relay triggers a cut-off in the DC cir- cuit of the brake coil almost instantaneously and the brake is applied extremely fast. The brake voltage is defined automatically on the basis of the motor phase voltage without further customer data Optionally, other brake voltages can be defined accord- ing to the following table.