75 kVA Dry Type Distribution Transformer NMK075DB

Sale Price: $2,663.45

List Price: $3,206.00

Dry Type Distribution Transformers:

Ratings: 15 to 45 kVA and 75 to 750 kVA
Voltage group: 600 volts and under
Frequency: 60Hz
Designed with a heavy duty, ventilated NEMA Type 3R enclosure (Optional NEMA 4, 4X and 12)
Insulation system: 220 C° (150 C° rise) / options available for copper
Single-phase and three-phase configurations available
UL listed - File: E112313
CSA certified - File: LR3902
Neutral: Neutral terminal for field connection (on applicable units)
Custom sizes, ratings and styles available upon request

Standard Design

Enclosure type: Heavy Duty NEMA Type 3R (optional NEMA 4, 4X, and 12 available)
Enclosure finish: ANSI 61 GREY, UL50
Termination: Front accessible separate high and low voltage terminals with connectors.
Conduit Knock-Outs: Standard on units 45 kVA and below, and on 75 kVA & 150 kVA units.
Mounting: Floor or wall/ceiling mounting available.
Sound level: Meets NEMA ST-20 standards (optional low noise units available)

Sizing Dry Type Distribution Transformers for Three Phase Loads:

1. Determine the load by getting the following information from equipment nameplates or instruction manual.

Voltage required by load.
Amperes or kVA required by load.
Frequency in Hz (cycles per second).
The frequency of the electrical load MUST match the line supply.
Verify load is designed to operate on three phase.

2. Determine the supply voltage.

Voltage of supply (source).
Frequency in Hz (cycles per second).
The frequency of the line supply MUST match the electrical load.

3. Select a transformer with a standard kVA capacity equal to or greater than that needed to operate the load.

Primary taps are available on most models to compensate for line voltage variations.
When load ratings are only available in amperes, the following formula may be used to determine
proper kVA size for the required transformer:

Three Phase kVA = Volts x Amps x 1.73
1000

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