Industrial control transformers (also known as machine tool transformers) fill the size range from 25 - 7500 VA and up to 600 V. They are used to step-up or step-down the supply voltage for the operation of electromagnetic devices such as timers, relays, contactors or solenoid switches. A critical element in their proper usage is to supply correct voltage during short-term periods of inrush currents, providing isolation to control components from power surges and lighting circuits. Solidly fixed terminals with standard combination screw connections facilitate wiring All models built with heat-proof insulation for compact size and long life All terminals clearly identified with additive polarity markings Many multi-voltage primary and secondary models increase range of applications per unit Every coil bobbin-wound for greater efficiency and superior heat evacuation capability