Medium Voltage Inductive Voltage Transformer · 7.2kV–36kV

Medium Voltage Inductive Voltage Transformers — 7.2kV to 36kV

From indoor resin cast voltage transformers to outdoor oil-impregnated paper (OIP) voltage transformers, Straton Electricals manufactures medium voltage potential transformers from 3.3kV to 33kV, designed to step down high voltage for protection relays, measuring instruments, and energy meters across power distribution networks. Available with cycloaliphatic epoxy resin for outdoor substation equipment, each MV potential transformer complies with IEC 61869-1 and IEC 61869-3, and IS 16227-3.

  • Indoor resin cast and outdoor oil-impregnated paper (OIP) constructions from 3.3kV to 33kV
  • Cycloaliphatic epoxy resin available for outdoor substation equipment
  • Complies with IEC 61869-1, IEC 61869-3 and IS 16227-3
  • Up to 5-year warranty with 2–3 week delivery lead times
Medium Voltage Inductive Voltage Transformers — 7.2kV to 36kV

Need the Right Instrument Transformer?

Request a Quote Download Data Sheet
Certifications

Certified and Approved For

IEC Compliant Designs
NABL Accredited Lab
ISO 14001:2015
ISO 9001:2015
Technical Specifications

Medium Voltage Inductive Voltage Transformers: Technical Specifications

Product TypeOil-Immersed Inductive Voltage Transformer
Voltage Range7.2kV – 36kV
Applicable StandardsIEC 61869-1 & IEC 61869-3 / IS 16227
Tank TypeDead Tank
Highest System VoltageUp to 36kV
Nominal System Voltage6.6 | 11 | 25/27.5 kV up to 33 kV
Insulation LevelUp to 95/250 kV
Frequency50Hz / 60Hz
Rated Voltage Factor1.2 Continuous, 1.5 (30 sec), 1.9 (8 hrs)
Primary Voltage6.6/√3 to 33/√3 kV
Secondary Voltage100/√3, 100V, 110/√3, 110V
Accuracy Classes0.2 | 0.5 | 1.0 | 3P | 5P
Maximum LV WindingsUp to 3
Mounting Dimensions275×305 mm
InstallationOutdoor
Product Types

Types of Medium Voltage Inductive Voltage Transformers — 7.2kV to 36kV

Indoor Voltage Transformer — Resin Cast

Indoor Voltage Transformer — Resin Cast

Void-free cycloaliphatic epoxy encapsulation for maintenance-free, partial discharge-free performance across indoor medium voltage installations.

Know More
Outdoor Voltage Transformer — Cycloaliphatic

Outdoor Voltage Transformer — Cycloaliphatic

Cycloaliphatic epoxy resin engineered for outdoor substation equipment across 3.3kV to 33kV, with UV and tracking resistance.

Know More
Dead Tank Inductive Voltage Transformer — OIP

Dead Tank Inductive Voltage Transformer — OIP

Oil-impregnated paper insulation for outdoor medium voltage substation installations from 11kV to 33kV.

Know More
Key Features

Key Features of Our Medium Voltage Inductive Voltage Transformers — 7.2kV to 36kV

OIP insulation with fine-graded bushings for uniform dielectric strength
Trapezoidal winding design for optimised internal voltage stress distribution and impulse withstand
Partial discharge-free performance up to power-frequency withstand voltage
Void-free cycloaliphatic epoxy encapsulation for uniform dielectric strength across the resin cast range
Rated for overvoltage operation at 1.9 times rated voltage
Built-in primary fuse for overcurrent protection on resin cast units
Maintenance-free resin cast construction — no oil, no filters, no periodic servicing
Stud-type DIN terminal connections for quick, secure secondary access
Compliant with IEC 61869-1, IEC 61869-3, IS 16227-1, IS 16227-3 and DIN 42600
Up to 5-year warranty with 2–3 week delivery lead times
Applications

Applications of Medium Voltage Inductive Voltage Transformers — 7.2kV to 36kV

Power Distribution Substations
Industrial Switchgear
Protection Relay Systems
Energy Metering
Utility Power Networks

Product Specifications – Medium Voltage Potential Transformers

Our medium voltage potential transformer range spans 11kV and 33kV ratings across resin cast and OIP constructions, covering primary/secondary ratios, accuracy class, burden, and insulation detail for each model.

  • 11kV range: 11RV01, 11RV02, 11RV03, 11RV04, 11RV05, 11RV06, 11RV07, 11RV08, 11RV09, 11RV10, 11RV11, 11RV12, 11OV-1P, 11OV-3P
  • 33kV range: 33RV01, 33RV02, 33RV03, 33RV04, 33OV-1P

Contact our engineering team for the full datasheet on any model in this range.

FAQ

Frequently Asked Questions

A medium voltage potential transformer (PT) is an instrument transformer that steps down high voltage to standardised secondary voltage levels for accurate voltage measurement, protection relaying, and energy metering in power systems rated 1.2kV to 36kV. Straton Electricals manufactures 11kV and 33kV potential transformers in OIP and resin cast constructions for utility substations and switchgear installations.
The core OIP vs Resin cast PT difference lies in insulation. OIP potential transformers use oil-impregnated paper insulation, making them suited for outdoor substation installations in humid and extreme climatic conditions. Resin cast potential transformers use cycloaliphatic epoxy encapsulation — maintenance free, compact, and suitable for both indoor switchgear and outdoor MV installations. OIP types require periodic oil monitoring; resin cast types require no servicing across their operational life.
A potential transformer (PT) and voltage transformer (VT) refer to the same instrument transformer device — both step down high voltage to standardised secondary levels for metering and protection. In India, the term potential transformer or PT is more commonly used in utility and substation applications, while voltage transformer or VT aligns with IEC 61869-3 terminology. Inductive voltage transformer (IVT) is the precise IEC term distinguishing electromagnetic types from capacitive voltage transformers (CVTs).
Straton Electricals' manufacturing facility delivers Medium Voltage Potential Transformers within 2–3 weeks, an industry-leading PT supply lead time and a quick delivery medium voltage transformer production timeline.
Medium voltage potential transformer accuracy is verified through ratio error testing, phase angle error testing, and voltage ratio measurement at Straton Electricals' in-house EHV 700kv NABL accredited test laboratory, complying with IEC 61869-3 and IS 16227-3 accuracy class.
Indoor medium voltage potential transformers require adequate ventilation, humidity control, and proper secondary circuit grounding in switchgear panels. Outdoor installations demand weatherproof housing, higher insulation levels, suitable IP-rated enclosures, and polymer or porcelain external insulation suited to local environmental conditions. Straton Electricals offers both indoor resin cast and outdoor OIP potential transformers to suit all installation requirements.
MVPTs improve operator safety by providing voltage isolation, metering accuracy, fault detection, relay coordination, and overvoltage protection — helping protection relays and control systems respond quickly to unsafe conditions.
Medium voltage potential transformers are available in metering accuracy classes 0.1, 0.2, and 0.5 for revenue metering and energy measurement, and protection accuracy classes 3P and 6P for protective relay applications. Class 0.2 is the preferred accuracy class for utility revenue metering at 11kV and 33kV substation installations. Straton Electricals manufactures MV potential transformers across all standard accuracy classes in compliance with IEC 61869-3 and IS 16227-3.
Talk To Us

Need a Reliable Medium Voltage Potential Transformer for Your Project?

Straton Electricals manufactures 11kV and 33kV potential transformers in OIP and resin cast constructions for utility substations and switchgear installations. Contact our engineering team for technical support, product selection, and customised specifications.

Request a Quote Talk to an Expert
Downloads

Download Technical Specifications

Users can download detailed technical documents for product selection and engineering reference.

Product Catalogue

Full range overview & specifications Download

Technical Datasheet

Full specifications, ratings & drawings Download
Call 9849513001 WhatsApp 9849513001