For control supply i.e. A=110 V, B=220 V, K =240V and M=415 V AC,1. DC Electromagnetic Brakes are suitable to operate on: For AC Power - Resistance & Rectifier Panel For DC Power - Series Resistance Box All Brakes are Supplied for Continuous Duty Resistance & Rectifier Panel is supplied without transformer Control Transformer (Optional) can be supplied at extra cost. Please add Rs. 4450 /- per unit with the LP of Resistance & Rectifier Panel. Please add 'TR' with respective panel cat. ref. to obtain final cat. Code of such panel with control transformer.