Transformer, dry type, 75kVA, 3 phase, 480V delta primary

Main

Product	Energy Efficient Dry TypeTransformer
Enclosure Code	20D
Enclosure Type	NEMA 2
Insulation Temperature	428 °F (220 °C)
Phase	3 phase
Primary Voltage	480 V delta
Power Rating	75 kVA
Secondary Voltage	480Y/277 V
Full Capacity Taps	6 2.5 % 2+ 4-
Temperature Rise	150 °C
Winding Material	Copper

 

Core Specs: 480V Delta Primary & Key Outputs

Let's start with the details that matter for your electrical system:

• Primary Configuration: 480V delta (a standard high-voltage input for commercial/industrial grids, ideal for reducing line losses in large setups).
• Primary Amperage (3-Phase Calculation):Amps = (75,000 VA) ÷ (480V × 1.732) ≈ 90.2 amps (the safe, continuous primary current this transformer handles).
• Common Secondary Configurations (GNEE Customizable):Most users pair a 480V delta primary with a 208Y/120V secondary (the most versatile 3-phase output for mixed loads):Secondary Amps = (75,000 VA) ÷ (208V × 1.732) ≈ 208 amps (supports lighting, HVAC, machinery, and 120V auxiliary loads).

We also offer custom secondary voltages (e.g., 240V 3-phase) to match your exact equipment requirements.

 

Why This Transformer Is a Top Choice for Indoor Setups

The combination of dry type design + 480V delta 3-phase delivers 3 unbeatable benefits:

• Fire Safety (Critical for Indoor Use): Unlike oil-immersed units, dry type transformers use air cooling (no flammable oil), complying with NFPA and building codes for data centers, office towers, and manufacturing floors with strict fire protocols.
• 480V Delta Efficiency: 480V primary input minimizes voltage drop over long wiring runs, while 3-phase power ensures balanced, stable current for heavy loads (e.g., industrial motors, large HVAC systems).
• Low Maintenance: No oil changes, leaks, or environmental risks-GNEE's dry type units only require annual dust cleaning, cutting long-term operational costs.

 

Top Applications for This Transformer

This unit is the workhorse of:

Industrial Facilities: Powers 480V incoming grids to run 208V machinery, welders, and assembly lines.

Data Centers: Delivers clean, stable 208Y/120V power for servers, cooling systems, and backup generators (with fire-safe design to protect critical infrastructure).

Commercial Buildings: Supports 480V utility inputs to feed 208V lighting, elevators, and rooftop HVAC units in malls or office complexes.

 

 

GNEE's Dry Type 75kVA 3-Phase 480V Delta Primary Transformers: What Sets Us Apart

When you choose GNEE for this unit, you get:

Compliance You Can Trust: UL-listed, IEEE-compliant, and tested to handle 480V surges (critical for grid stability).

Low-Loss Core Design: Our transformers use high-grade silicon steel to cut energy waste-reducing your monthly utility bills by up to 5% vs. generic units.

Durable Enclosure: NEMA 3R (indoor/outdoor rated) or NEMA 12 (dust/water-resistant) enclosures, tailored to your installation environment.

Free Expert Sizing Support: Our engineers confirm your load type (inductive/capacitive) and power factor to ensure the transformer never underperforms (or overloads).

 

Get Your Custom Quote Today

 

If you need a dry type 75kVA 3-phase transformer with 480V delta primary (or a custom variant), GNEE delivers fast, reliable solutions.

Send us your secondary voltage needs and installation environment, and we'll:

• Confirm your exact amp capacity and load compatibility
• Share a detailed spec sheet (including efficiency ratings)
• Provide a no-obligation quote with 2-week delivery (for standard configurations).

 

Don't risk sizing mistakes or non-compliant units-contact GNEE now to secure a transformer that fits your 480V 3-phase power needs perfectly.

Request A Quote

 

What size primary breaker for a 75 kVA transformer?

Breaker Size for 75 kVA Transformer with 4/0 copper Wire
For a 75 kVA transformer at 480V, calculate full load current: 75,000 VA ÷ 480 V ˜ 156 A. Use a breaker rated 125% of full load current, so about 195 A minimum; a 200 A breaker is appropriate.

 

What is the maximum Amps for a 75va transformer?

3.125 amps

Using this formula, a 75 VA rated 24 volt transformer has a maximum load of 3.125 amps. 75 VA ÷ 24 volts = 3.125 amps.

 

What size wire do I need to feed a 75 kVA transformer?

According to the standards stated in Table 310.15(B)(16) and the rule stated in 240.4(B), it will require 115A ampacity. With that, it will have the recommended wire size for a 75 kVA transformer which is a 2 AWG copper conductor considering normal or standard conditions.

 

How many amps is A 75 kVA 3 phase transformer?

Three Phase Transformer Full Load Amps Table

KVA	208v	480v
45	124	54
75	208	90
112-1/2	312	135
150	416	180

 

How much load can a 75 kVA transformer handle?

75KVA/208X1. 732 = 208 amps. That is the maximum load of the transformer. If the transformer is rated to carry its maximum load continuously, that means you can load it to 208 amps continuously, not that you can overload it.