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75 kVA 460 Volt to 380 Volt Three phase Autotransformer RC75H1-F

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Availability: NOT in stock. Current lead time to manufacture: 5-6 weeks

US$ 3,161.00

Quick Overview

Catalog No.: RC75H1-F
Autotransformer 75 kVA • Three Phase • Primary: 460 Volt • Secondary: 380 Volt
Conductor: Copper. • Frequency 60 Hz.
+US$ 560.00

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US$ 3,161.00


Three phase Autotransformer RC75H1-F has common primary-secondary windings which are not insulated from each other, offers no interference or disturbance isolation between primary and secondary circuits. It is an economical solution but is not suitable for sensitive equipment with electronic and servo components but perfectly suitable for simple motor/heater single or balanced applications. NOTE: standard 3 phase autotransformer comes without neutral lead, but if you need, please request the neutral lead from "Optional Features" tab.

 Autotransformer general dimensions

Preliminary General Drawing. (Dimension, inch).

*All information and images presented here is based on preliminary data or design and may be changed without prior notice.
Request Drawing Proof to confirm dimensions from Optional Feature tab, if it is critical.

Autotransformer RC75H1-F Winding Schematics:


Wye(Y0) Three phase connection

Full Specification

Catalog No. RC75H1-F
Product Type Autotransformer
Phase Three
Power Rating 75 kVA
Frequency, Hz 60
Vector Group Wye(Y0)
Primary voltage 460 Volt
Primary Max Current, Amps 94.1A
Primary Terminals H1-H2-H3
Secondary Voltage 380 Volt
Secondary Max Current, Amps 114.0A
Secondary Terminals X1-X2-X3
Winding Conductor Copper
Temperature Rise, °C 150
Insulation Class 220 (R)
Insulation Level, (B.I.L), kVA 10
Efficiency at 35% Load, % 95.2
ANSI/IEEE Impedance, % 2.5-3.5
Sound Level, dB 40
Standards, Certifications, Compliances: CSA Standard C22.2. No.47 Air Cooled Transformers (Dry Type)., CSA certified. File No. LR34493
UL Listed. File No.E108255., ISO9001 Quality Certification.
Enclosure Type Nema 3R. General purpose indoor ventilated steel enclosure suitable for dry locations. Sprinkler Proof when angle between sprinkler and opening does not exceed 45° (IP14). FINISH - Polyester powder coat.
Weight, Lbs 230.0
Country of Manufacture Canada

Transformer Calculator

Help: To calculate required kVA of the transformer enter Load Amps, Load Volt and press "Required kVA" button. Also you can calculate Current from other two parameters.
Note: Recommended add up to 20% to the calculated kVA