Instrument transformers
Voltage Transformers up to 33kV
Amrest Electricals Limited manufactures voltage transformers (VT / PT) up to 33kV for accurate metering and reliable protection, in single phase and three phase units. Customized solutions are available as per client specifications.
Up to 33kVSingle and three phaseIndoor and outdoor
Our range
Types of voltage transformers
1
Dry-type resin cast
Indoor type. Epoxy resin encapsulated, non-hygroscopic insulation, naturally air-cooled.
- Single phase / three phase
- Voltage class up to 33 kV
- Customized as per client specification
2
Outdoor oil-cooled
Outdoor type with mineral oil insulation and ONAN cooling.
- Single phase / three phase
- Voltage class up to 33 kV
- Hermetically sealed or conservator type, as per requirement
3
Outdoor resin cast
Outdoor type resin cast voltage transformers, oil-free and low maintenance.
- Single phase / three phase
- Voltage class up to 33 kV
Specification
Key features at a glance
| Parameter | Dry-type resin cast | Outdoor oil-cooled |
|---|---|---|
| Type | Single phase / three phase | Single phase / three phase |
| Voltage class | Up to 33 kV | Up to 33 kV |
| Insulation | Epoxy resin encapsulated (non-hygroscopic) | Mineral oil (IS 335 / IEC 60296) |
| Cooling | Naturally air-cooled (dry type) | ONAN (oil natural air natural) |
| Secondary voltage | 110 V or 110/√3 V | 110 V or 110/√3 V |
| Rated burden | 10 VA to 500 VA at 0.8 PF lagging | 10 VA to 500 VA at 0.8 PF lagging |
| Frequency | 50 / 60 Hz | 50 / 60 Hz |
| Accuracy class (metering) | 0.1, 0.2, 0.5, 1.0, 3 | 0.1, 0.2, 0.5, 1.0, 3 |
| Accuracy class (protection) | 3P, 6P | 3P, 6P |
| Construction | Resin cast | Hermetically sealed or conservator type, as per customer requirement |
Final ratings, burden and accuracy class are defined as per customer/project requirement.
Use
Metering and protection
- Metering classes: 0.1, 0.2, 0.5, 1.0 and 3 for energy meters and measuring instruments
- Protection classes: 3P and 6P for protection relays
Standards reference
Applicable standards
- IS 3156
- IEC 60044-2 (now part of the IEC 61869 series)
- ANSI C57
Applicable standards and test documentation are confirmed in the technical offer for each project.
Get a quotation
What to send us
Share as many of these details as you have, or send your datasheet or BOQ directly.
Primary voltage and ratio
Secondary voltage
Rated burden (VA)
Accuracy class
Single or three phase
Indoor or outdoor type
Quantity
Project location
Delivery timeline
Related products