This series drop 3-phase AC power supply through rectifier transformer and then get 220V DC through single-phase (3-phase) rectifier bridge unit. Each cabinet consists of auto air switch, rectifier transformer, rectifier unit, DC contactors, etc., The circuit has safe protections like short circuit and over voltage. It has advantages of simple structure, compact, light weight, reliable performance and convenient for repair. The rectifier transformer will be equipped with outside cover when the rated capacity of cabinet is more than 19 kW. The improved type has no rectification transformer, for it can rectify 3-phase AC power through bridge type rectifier directly and thus get DC.
STQ(M)L connection scheme
Main technical data
Corollary equipment & overall dimension (for reference)
Note: For outdoor type, add an extra 50 mm at the thickness of cabinet , 30mm at the width of the top and 50mm along both forward and backward direction;there’s no rectification transformer if the control cabinet belongs to improved type. Rated voltage of the magnet should match with output voltage of cabinet and magnet power in cold-state shall be less than rated output power of cabinet. If ambient temperature of the cabinet is over 40°C please state clearly when place an order.