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75Kva Three Phase Isolation Transformer Power Step Down Dry Type 480v 270v Copper Winding

Xiamen Winley Electric Co.,Ltd
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75Kva Three Phase Isolation Transformer Power Step Down Dry Type 480v 270v Copper Winding

Brand Name : WINLEY

Model Number : 75KVA

Certification : UL/cUL,CE,ISO

Place of Origin : CHINA

MOQ : 1unit

Price : $1000-$150000

Payment Terms : T/T

Supply Ability : 1000set/month

Delivery Time : 30days

Packaging Details : Plywood case

Capacity : 50KVA to 5000KVA Available

Primary Voltage : 480V Or customized

Secondary Voltage : 270V Or Customized

Frequency : 50/60Hz

Insulation Class : F/H

Material : Copper/Aluminium

Efficiency : ≥98%

Design Standard : IEC60076/ANSI

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75Kva Three Phase Isolation Transformer Power Step Down Dry Type 480v 270v Copper Winding

Summarization

Engineered for demanding environments, our 75 kVA three-phase dry-type isolation transformer offers reliable voltage conversion from 480V to 270V with H-class insulation (180°C rating), delivering superior heat resistance and durability. Ideal for industrial, commercial, and mission-critical applications, this transformer combines robust isolation with advanced safety features.

75Kva Three Phase Isolation Transformer Power Step Down Dry Type 480v 270v Copper Winding75Kva Three Phase Isolation Transformer Power Step Down Dry Type 480v 270v Copper Winding75Kva Three Phase Isolation Transformer Power Step Down Dry Type 480v 270v Copper Winding75Kva Three Phase Isolation Transformer Power Step Down Dry Type 480v 270v Copper Winding

Main data

Basics Model SG75KVA
Phase 3 phase
Capacity 75 kVA
Weight of Copper Wire Transformer 310kg
Technical Parameters Primary Voltage 480V Or customized
Secondary Voltage 270V Or customized
Voltage Convert Three phase to three phase
Frequency 50Hz / 60 Hz
Winding Material Aluminium/Copper wire (Optional)
Work Efficiency ≥98%
Insulation Resistance ≥50 MΩ
Electrical Strength 3000V AC/1 min
Noise <35-65dB (1 meter)
Insulation Grade H level
Wiring Mode D/Yd
Cooling Mode Dry type air cooling
Certificate CE, ISO
Warranty 24 months
Working Environment Temperature -15~+40
Humidity ≤90%RH, without condensation
Altitude <1000m, non corrosive gas and conductive dust

Key Features & Benefits

  • H-Class Insulation: Rated for 180°C, providing exceptional thermal stability and extended lifespan in high-temperature environments. Epoxy-encapsulated windings resist moisture, dust, and contaminants, ensuring reliable operation in harsh conditions.
  • Electrical Isolation: Galvanic separation between 480V primary and 270V secondary circuits eliminates ground loops, suppresses electrical noise, and protects sensitive equipment from voltage surges. Complies with ANSI/IEEE standards for isolation and surge protection.
  • Oil-Free Dry-Type Design: Eliminates fire hazards and environmental risks associated with liquid-filled units. Low-maintenance design reduces operational costs and meets strict safety regulations for indoor/outdoor use (NEMA 3R enclosure optional).
  • Efficient Cooling: Natural air cooling (AN) ensures continuous full-load operation. Optional forced air cooling (AF) increases capacity by 30%, maintaining winding temperatures well below H-class limits for reliable performance under heavy loads.
  • Precision Engineering: Copper windings and grain-oriented silicon steel core deliver ±2% voltage regulation and >95% efficiency. H-class insulation enables compact design without compromising on power density.

Drawing

75Kva Three Phase Isolation Transformer Power Step Down Dry Type 480v 270v Copper Winding

Specification

Model
(kva)
Primary Voltage Secondary Voltage Coupling group tab Shape dimension Mounting dimension K*J The box dimension
Bmax Dmax±5 Emax A C±5 Bmax Dmax±5 Emax
SG-10KVA 660
400
380
200
380
220
110
36
Yyn0
Y/d
D/y
D/d
360 180 305 215 140 10*20 450 360 480
SG-15KVA 360 200 335 215 155 10*20 450 360 480
SG-20KVA 420 210 350 250 170 10*20 490 400 540
SG-30KVA 420 230 380 250 190 10*20 490 400 540
SG-50KVA 680 350 550 420 220 10*20 800 510 840
SG-80KVA 750 400 620 480 250 10*20 850 510 840
SG-100KVA 780 420 650 500 250 10*20 900 550 890
SG-300KVA 180 95 185 100 75 6*14
SG-500KVA 180 95 185 100 75 6*14
SG-1000KVA 180 110 185 100 90 6*14
SG-2000KVA 230 125 205 130 100 9*16
SG-3000KVA 240 145 215 130 120 9*16
SG-4000KVA 240 155 235 130 130 9*16
SG-5000KVA 320 160 255 180 115 10*20 400 330 480
SG-6000KVA 300 165 280 180 140 10*20 400 330 480

Application


The three phase voltage stabilizer can be applied to large type electromechanical equipment, metal processing equipment, production line, construction device , elevator, medical equipment, equipment of light and textile industry, air-condition, TV set, household appliance and lighting used for industry, agriculture, traffic, military, railroad, scientific culture, etc, where need voltage stabilization.

Production process

75Kva Three Phase Isolation Transformer Power Step Down Dry Type 480v 270v Copper Winding

75Kva Three Phase Isolation Transformer Power Step Down Dry Type 480v 270v Copper Winding

75Kva Three Phase Isolation Transformer Power Step Down Dry Type 480v 270v Copper Winding

FAQ

1. Q: Can I have a sample order?

A: Yes, we welcome sample order to test and check quality.

2. Q: What is the lead time?

A: Mass production time 15-25 days.

3. Q: How long is the warranty?

A: 24 monthes from B/L. If there are any accessory problems,just provide the photos of damaged accessory,then we will provide free service. According to the number of products,we will provide easily damaged accessories for free. we also can provide technical support if you need.

4. Q: Is OEM/ODM available?

A: Yes,it is! We are manufacturer with our own R&D team, we can customize products according to customer's drawing or requirements.

Customized services:

a. Customized color and special function.

b. Customized box.

c. Print customer's logo.

d. Your other ideas about product, we can help you design and put them into production. The above customized services must be confirmed before production.

5. Q: How to control the products quality?

A: Our company owns the core technology ,all kinds of products hold CE certificate. We have professional engineers. Workers are strictly required to make products according to the drawings. Each process has technical instructors.The QC supervisors will regularly inspect the production. We will do products performance tests during production, and comprehensive quality tests when the products is completed.


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