Voltage Transformer

Amrest Electricals Ltd. is a trusted name in the electrical power industry, renowned for manufacturing, exporting, and supplying high-precision Voltage Transformers (VTs) across India and international markets. Our transformers are specially designed for metering and protection in high-voltage and medium-voltage systems, ensuring safety, accuracy, and durability in critical power infrastructure.

Our Product Range

🔹 Indoor Dry-Type Resin Cast Voltage Transformers
🔹 Outdoor Oil-Cooled Voltage Transformers
🔹 Single Phase and Three Phase Designs Available
🔹 Three Phase Residual Voltage Transformers (RPT / RVT)

Indoor Dry-Type Resin Cast Voltage Transformers

Amrest Electricals Ltd. offers a premium range of Indoor Dry-Type Resin Cast Voltage Transformers (VTs) designed for accurate voltage measurement and reliable protection in medium and high-voltage systems. These transformers are encapsulated in high-quality epoxy resin, providing excellent dielectric strength, moisture resistance, and mechanical durability — ideal for indoor installations such as switchgear panels and control rooms.

Key Features:

  • Type: Single Phase / Three Phase
  • Voltage Class: Up to 33 kV
  • Insulation: Epoxy Resin Encapsulated (Non-hygroscopic)
  • Cooling: Naturally Air-Cooled (Dry Type)
  • Secondary Voltage: 110 V or 110/√3 V
  • Rated Burden: 10 VA to 500 VA at 0.8 PF lagging
  • Frequency: 50/60 Hz
  • Accuracy Class:
    • Metering: 0.1, 0.2, 0.5, 1.0, 3
    • Protection: 3P, 6P

Outdoor Oil-Cooled Voltage Transformers

Amrest Electricals Ltd. manufactures high-quality Outdoor Oil-Cooled Voltage Transformers (VTs) designed to deliver accurate voltage measurement and system protection in outdoor high-voltage power networks. Built for durability and performance, these transformers are oil-immersed and housed in robust weatherproof enclosures, ensuring stable operation in harsh environmental conditions.

Key Features:

  • Type: Single Phase / Three Phase
  • Voltage Class: Up to 220 kV
  • Insulation Medium: Mineral Oil (Conforming to IS 335 / IEC 60296)
  • Secondary Voltage: 110 V or 110/√3 V
  • Rated Burden: 10 VA to 500 VA at 0.8 PF lagging
  • Cooling Type: Oil Natural Air Natural (ONAN)
  • Accuracy Class:
    • Metering: 0.1, 0.2, 0.5, 1.0, 3
    • Protection: 3P, 6P
  • Frequency: 50/60 Hz
  • Construction: Hermetically sealed or conservator type as per customer requirement
  • Standards Compliance: IS 3156, IEC 60044-2, ANSI C57

Applications

  • Revenue metering in substations
  • Protection of power system equipment
  • Voltage monitoring and indication
  • Detection of residual voltage in unearthed and grounded networks

Technical Specifications

  • Standard Secondary Voltage: 110 V or 110/√3 V
  • Rated Burden: 10 VA to 500 VA at 0.8 lagging power factor
  • Frequency: 50/60 Hz
  • Insulation Class: A, B, or F
  • Cooling:
    • Dry Type – Resin Cast (Indoor)
    • Oil-Immersed (Outdoor)

Accuracy Classes

🔸 For Metering Voltage Transformers:

 • 0.1 • 0.2 • 0.5 • 1.0 • 3.0

🔸 For Protective Voltage Transformers:

• 3PR • 6PR

🔸 For Residual Voltage Transformers (RPT/RVT):

 • 5PR • 6PR

Voltage Factor Options

We offer a range of standard and custom voltage factors including:

  • 1.2 Continuous
  • 1.5 for 30 Seconds
  • 1.9 for 30 Seconds
    (Specified as per system application and protection requirements)

Why Choose Amrest Voltage Transformers?

✅ High Measurement Accuracy
✅ Robust Design for Harsh Environments
✅ Reliable Electrical Insulation and Dielectric Strength
✅ Low Maintenance, Long Life
✅ Fully Compliant with IS 3156, IEC 60044-2, and ANSI Standards
✅ Customizable Solutions Available

We are Manufacturer, exporter and Supplier of Voltage Transformer, Potential Transformer for India, United Arab Emirates , Dubai , Sharjah , Saudi Arabia , Bahrain , Iraq , Kuwait , Oman , Qatar, Afghanistan, South Africa , Zambia , Tanzania , Ghana , Nepal , Bhutan , Bangladesh, Indonesia, Kenya , Malaysia, Turkey, Zimbabwe and other countries.

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