408 - Transformer Wiring Trainer

Product Dimensions
(W x H x D)
19in. x 19in. x 15in. (480 x 480 x 381 mm)
45 lbs. (23 kg)

Shipping Dimensions
70 lbs. (28 kg)

This realistic training device replicates the conditions and circumstances that an electrical worker encounters when making common power transformer connections in the field, in industry.

A wide variety of activities can be performed, all at reduced voltages for safety (A 208 VAC, 3-phase source is stepped down, creating a 41 VAC, 3-phase system). Both three-phase and single-phase applications are provided. Using banana jacks and plugs, all ground connections, primary connections, and secondary connections are easily made.

Two complete sets of three phase transformers are provided so that transformer paralleling can be explored.

Eight instructor-accessible fault switches are provided, in the rear of the device in order to simulate failure conditions and allow troubleshooting during training.

The training aid provides a safe, inexpensive, efficient, yet realistic alternative to paper-based learning without the danger of full-voltage field experience.
Welded aluminum base assembly, using 1.5" square, 1/8" wall tubing.
16-Gauge, formed-steel support structure, allowing for attachment to base assembly or associated mounting bench products.
16-Gauge, formed-steel electrical enclosure.
Powder-coated surfaces throughout.
Powder-coated and silk-screened 1/8" aluminum front panel face, 19" x 18.5".
Keyed instructor power switch.
Circuit breaker with provision for lock-out/tag-out.
Pilot light and emergency stop switch.
Internal electrical interlock, de-energizing power when opening electrical enclosure.
Color-coded, banana-jack receptacles for all transformers and associated components.
Permanent internal grounding (not dependent on student wiring).
8 instructor fault switches (rear of device).
Allows for both single-phase and three-phase activities.
Banana jack connections used throughout.
Low-voltage operation using step-down transformers.
Internally-fused.
Packaging for shipment via motor freight.
#408-500 - Use/Exercise Guide (additional
#408-PAC - Transformer Wiring Trainer, Quick-Start Package (Includes #408, #945, and #560-000)
· Patch cords.
· Panel-mounted voltmeter and phase rotation meter.
· Use/Exercise Guide.
240V, 3-Phase
The courseware, useful in both an instructor-led or self-directed format, includes illustrated, hands-on exercises.

- Perform single-phase transformer connections.
- Analyze transformer single phase voltages.
- Identify three-phase connections.
- Interconnect multiple transformers in Wye or Delta configurations.
- Analyze three-phase voltage readings.
- Identify “transformer turns ratio” (TTR).
- Demonstrate how three-phase transformer connections can produce incorrect motor rotation.
- Demonstrate how to parallel single-phase and three-phase transformers.
- Simulate a burned-out transformer in a three-phase bank.


This device has been designed for professionals for use under controlled circumstances for training only. DAC assumes no liability for injury resulting from the use or misuse of this product.
DAC assumes no liability for injury resulting from the techniques and practices outlined in this training material.