TEMCo Autotransformer T50556 37.5 kVA, 440 Primary Volts x 480 Secondary Volts, 50/60 Hz, Single Phase, Copper

An autotransformer has only one winding per phase, part of which is common to both primary and secondary circuits. Using an autotransformer is an economical and compact means of connecting electrical equipment to a power supply or a different voltage. Part of the winding is common to both primary and secondary circuits, so there is no isolation between the two. This may be acceptable on some power systems that do not have a grounded neutral on the secondary side of the main power transformer. Typical applications include motor loads of industrial machinery, electric heating, and air conditioners.

Features

• Performs same function as an isolation transformer of same KVA and voltage rating without the isolation feature.
• Ventilated openings in the enclosure are coordinated with the cooling ducts in the coils to ensure proper natural circulation of air for long life and minimum losses.
• NEMA 3R enclosure is finished in ASA61 grey powder paint suitable for most industrial and commercial installations.
• Most units have lifting lugs, conduit knockouts and removable front and back covers for easy access to terminals.
• Transformer terminations rated below 330A are supplied with suitable hardware and lugs for cable connection. Terminations above 330A are supplied with termination pads.
• Generally quieter than the equivalent isolation transformer.
• May be used in either step-up or step-down configuration.
• Low regulation (typically less than 3%).
• Class 220 insulation
• CSA certified File No. LR34493, UL Listed File No. E108255, ISO9001 Quality Certification