MGM Transformer AD370-J0605 75 KVA 3-Phase 480V Delta 156Y/90V Wye 50Hz Dry

MGM Transformer AD370-J0605 75 KVA 3-Phase 480V Delta 156Y/90V Wye 50Hz Dry

The MGM Transformer Company AD370-J0605 is a 75 KVA three-phase dry-type distribution transformer configured for special-voltage 50 Hz service, stepping down 480V delta primary power to a 156Y/90V wye secondary. Manufactured in City of Commerce, CA and UL-listed as a Power Transformer (297T), this is a floor-mount unit with a ventilated steel enclosure and three-phase copper wound coil assembly. It is a Type HT transformer rated for a 220°C insulation system with a 150°C temperature rise.

Specifications & What's Included

• Manufacturer: MGM Transformer Company, City of Commerce, CA 90040
• Catalog Number: AD370-J0605
• Power Rating: 75 KVA
• Phase: Three Phase
• Frequency: 50 Hz
• Primary Voltage: 480V Delta
• Secondary Voltage: 156Y/90V Wye
• Transformer Type: HT (High Temperature class)
• Cooling Class: AA (Air-to-Air, Self-Cooled — no fans or liquid required)
• Insulation System: 220°C
• Temperature Rise: 150°C
• Impedance: 5.02% at 170°C
• Primary Voltage Taps: 4-5: 504V | 4-6: 492V | 3-5: 480V | 3-6: 468V | 2-6: 456V | 3-7: 444V | 2-7: 432V
• Secondary Terminals: X1, X2, X3 (visible on terminal bus with color-coded lead wires attached)
• Primary Terminals: H1, H2, H3 (visible on terminal bus)
• Listing: UL Listed – Power Transformer – 297T
• Form Factor: Floor mount with integral base frame and mounting brackets
• Enclosure: Ventilated steel, painted gray
• Conduit entries on primary and secondary sides (conduit stubs visible in photos)
• Lead wiring attached to terminal buses as shown in photos

Applications

Dry-type distribution transformers like this AD370 are used in industrial and commercial facilities to convert available line voltage to a non-standard or application-specific secondary voltage. This unit's 50 Hz rating and 480V-to-156Y/90V configuration make it well suited for facilities running 50 Hz electrical systems — common in international manufacturing plants, export equipment test environments, and facilities that operate machinery designed for European or other 50 Hz power standards. The 156Y/90V secondary is a custom wye configuration that provides both a phase-to-neutral voltage (90V) and a line-to-line voltage (156V), supporting specific equipment loads that require non-standard voltages not available directly from utility distribution. Three-phase dry-type transformers of this class are a standard building block in industrial electrical distribution systems; the Class AA cooling rating means the unit relies entirely on natural convection airflow with no auxiliary cooling equipment required, simplifying installation and maintenance. The Type HT designation reflects the use of a high-temperature 220°C insulation system, which allows the transformer to handle higher thermal loads in demanding environments. Units of this size and configuration are typically found in manufacturing, process control, semiconductor fabrication, and other industrial settings where custom voltage conversion is needed for specialized machinery.