Single-Phase Cast Resin VT
A single-phase unit for phase-to-earth or phase-to-phase voltage measurement, commonly used in three-unit sets for full three-phase metering and protection.
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Medium Voltage Voltage Transformer · 2.2kV–36kV
Medium Voltage Cast Resin Voltage Transformers — 2.2kV to 36kV
IEC 61869-3 & IS 3156 type-tested cast resin voltage transformers for indoor and outdoor MV switchgear, metering panels and distribution substations.
- Maintenance-free cast resin construction — single-phase and three-phase variants
- Accuracy class 0.2/0.5 metering and 3P/6P protection windings
- Compact footprint engineered for panel-mount and switchgear integration
- Custom ratios and burdens matched to your switchgear OEM drawing
Certifications
Certified and Approved For
IEC Compliant Designs
NABL Accredited Lab
ISO 14001:2015
ISO 9001:2015
Technical Specifications
Technical Specifications
Product TypeCast Resin Medium Voltage Voltage Transformer
Voltage Range2.2 | 3.3 | 6.6 | 11 | 22 | 33 kV up to 36 kV
Applicable StandardsIEC 61869-1 & IEC 61869-3, IS 3156
Highest System Voltage (Um)3.6 | 7.2 | 12 | 24 kV up to 36 kV
Rated Primary VoltageUn/√3 or Un
Rated Secondary Voltage110/√3 V, 110 V, 100 V (standard); custom on request
Accuracy Classes0.2 | 0.5 | 1 (metering); 3P | 6P (protection)
Burden Ratings15 VA to 100 VA, or customer-specified
Insulation TypeCast Epoxy Resin (bisphenol indoor / cycloaliphatic outdoor)
Insulation Level12/28/60kVp, 24/50/125kVp, 36/70/170kVp
Frequency50Hz / 60Hz
ConfigurationSingle-phase or three-phase
InstallationIndoor or Outdoor
Mounting TypePanel / Bus-bar Mounted
Product Types
Types of Medium Voltage Cast Resin Voltage Transformers — 2.2kV to 36kV
Three-Phase Cast Resin VT
A single housing covering all three phases, saving panel space compared to three separate single-phase units — well suited to compact switchgear cubicles.
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Key Features
Key Features of Our Medium Voltage Cast Resin Voltage Transformers — 2.2kV to 36kV
Voltage ratings from 2.2kV up to 36kV, indoor and outdoor variants
Metering accuracy class 0.2/0.5, protection class 3P/6P
Designed and tested in compliance with IEC 61869-3 and IS 3156
Maintenance-free cast epoxy resin construction — no oil, no periodic top-up
Ferro-resonance-suppressing design where required by application
Compact dimensions engineered to fit standard switchgear cubicles
Custom secondary winding configuration and burden available
Tested in-house before dispatch, with NABL-accredited lab verification available
In medium-voltage distribution networks, MV voltage transformers scale primary voltages from 2.2kV to 36kV down to standardised secondary values for meters, relays and monitoring instruments. Straton Electricals manufactures both indoor bisphenol and outdoor cycloaliphatic cast-resin VTs, sized to fit directly into standard switchgear panels.
Applications
Applications of Medium Voltage Cast Resin Voltage Transformers — 2.2kV to 36kV
Indoor & Outdoor MV Switchgear
Ring Main Units (RMUs)Distribution SubstationsIndustrial Power Distribution Panels
Renewable Energy Plants (Solar, Wind)
Protection Relay & Control Systems
Revenue & Energy MeteringStraton Electricals MV voltage transformers are engineered for accurate, dependable performance inside compact switchgear cubicles. For OEM panel builders and EPC contractors, we also offer custom ratios, burdens and mounting arrangements matched to your existing panel drawings.
FAQ
Frequently Asked Questions
A Medium Voltage Voltage Transformer (MVVT) is an instrument transformer that scales primary voltages in the 2.2kV–36kV distribution range down to a standardised secondary value — typically 110/√3 V or 110 V — for meters, relays and protection equipment.
Three single-phase units give more flexibility for open-delta or specific fault-detection configurations; a three-phase unit in one housing saves panel space where standard star-connected metering is sufficient.
Metering windings are available in class 0.2, 0.5 or 1; protection windings in class 3P or 6P — both can be combined on the same unit.
Yes — our outdoor cycloaliphatic cast-resin construction resists UV degradation and surface tracking for long-term outdoor exposure, unlike standard indoor bisphenol resin units.
Cast resin construction means no oil and effectively no routine maintenance under normal conditions. Periodic visual inspection and insulation resistance testing are still recommended as part of a substation's general maintenance schedule.
Talk To Us
Need Help Selecting the Right Medium Voltage Voltage Transformer?
Straton Electricals offers customized medium voltage voltage transformer solutions for switchgear OEMs, distribution substations, and industrial panel builders. Contact our engineering team for technical support, product selection, and customised VT specifications.
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