What Is the AC High-Voltage Dry-Type Test Transformer?

Wrindu AC high-voltage dry-type test transformer is oil-free design with compact size, high safety, stable output, and easy operation for labs, workshops, and on-site testing.

Wrindu Dry-type Test Transformer

The AC High-Voltage Dry-Type Test Transformer is an oil-free solution for power frequency withstand voltage testing. It suits laboratories, workshops, and on-site testing. The compact design makes transport and operation easy.

Why Choose This Dry-Type Test Transformer?

  • Small size and light weight

  • Compact structure

  • Oil-free design with no leakage

  • Maintenance-free operation

  • Environmentally friendly

  • Simple and intuitive wiring

  • Easy to use, even for new operators

  • High safety and reliable performance

  • Clean and modern appearance

What Are the Main Technical Features of dry-type test transformer?

  • Dry-type solid insulation

  • Stable output voltage

  • Low noise during operation

  • Safe operation without oil or gas

  • Suitable for power frequency AC tests

What Are the Technical Specificationsof dry-type test transformer?

Capacity (kVA) Low Voltage (V) Low Current (A) High Voltage (kV) High Current (mA) Weight (kg)
5 / 50 200 25 50 110 30
10 / 50 200 50 50 200 40
15 / 50 200 75 50 300 50
20 / 50 200 100 50 400 55
25 / 50 200 125 50 500 60
30 / 50 200 150 50 600 65
5 / 100 400 12.5 100 50 60
10 / 100 400 25 100 100 65
15 / 100 400 37.5 100 150 70
20 / 100 400 50 100 200 75
25 / 100 400 62.5 100 250 80
15 / 120 400 37.5 120 125 85
20 / 120 400 50 120 160 90
25 / 150 400 62.5 120 200 95
30 / 120 400 75 120 250 100

Where Can Dry-type Test Transformer Be Used?

  • Power equipment insulation tests

  • Cable and switchgear testing

  • Factory quality inspections

  • Laboratory and workshop testing

FAQs

What is the primary purpose of a dry-type test transformer?
A: Its main purpose is insulation performance testing of electrical equipment. It supports AC and DC high-voltage tests with small current and helps find hidden problems such as damaged insulation or poor contacts before equipment goes into service.

What are the main advantages over oil-immersed models?
A: Dry-type test transformers are safer, easier to maintain, and more portable. They contain no flammable oil, need no oil replacement or chemical testing, are lighter for field work, and avoid environmental pollution from oil leaks.

What are the typical limitations?
A: Dry-type test transformers have lower voltage limits and heat tolerance. They usually work below 35 kV, generate more heat during long overloads, and often produce more noise than oil-filled transformers.

How should a dry-type transformer be tested?
A: Testing focuses on visual condition, insulation quality, and electrical integrity. This includes visual inspection, insulation resistance testing, dielectric strength testing, and DC winding resistance measurement.

Where are they most commonly used?
A: Dry-type test transformers are best for indoor and high-safety environments. Common applications include hospitals, schools, shopping malls, subways, airports, data centers, chemical plants, and renewable energy sites such as solar and wind farms.

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