Primary voltage
01Up to 33 kV
Outdoor oil-immersed
Outdoor Instrument Transformers
Outdoor Potential Transformers
INDULF manufactures outdoor oil-immersed potential transformers for voltage measurement, metering and protection applications up to 33 kV. Every transformer reflects controlled manufacturing, precision workmanship and rigorous testing, delivering the confidence required for critical power systems.
Primary voltage
UP TO 33 kV
Secondary voltage
110 V / 110/√3 V
Overview
Built for accurate voltage transformation
Outdoor potential transformers play a critical role in converting high system voltage into accurate, usable secondary voltage for metering, protection and monitoring. INDULF manufactures oil-immersed PTs for outdoor substations, feeders and industrial power systems, designed to deliver consistent voltage transformation and reliable measurement under demanding operating conditions.
Our manufacturing process combines controlled construction, precision workmanship and application-focused engineering. Each transformer is produced around the required voltage ratio, accuracy, burden, insulation level and secondary arrangement, ensuring the finished unit is suited to the electrical system and protection or metering application it serves.
Quality and testing remain integral to the manufacturing process. INDULF provides in-house testing capability supported by NABL-accredited facilities, with routine testing and documented verification carried out before dispatch. Our PTs also support approved utility and infrastructure applications across North Indian markets, backed by the technical documentation required for inspection, approval and commissioning.
- Precision voltage transformation for metering, protection and monitoring
- Manufactured and tested under controlled quality processes
- NABL-accredited testing capability and project-ready documentation
What we manufacture
A PT range built around your application
INDULF manufactures outdoor PTs across metering, protection and earth-fault applications, with configurations suited to substations, feeders and industrial power systems.
Up to 33 kV
Outdoor Oil-Immersed PTs
For outdoor substations, feeders and industrial power systems.
Metering
Metering-Class PTs
For accurate voltage measurement and metering applications.
Protection
Protection-Class PTs
For dependable voltage signals in protection and control systems.
Earth-fault
Residual / Open-Delta PTs
For earth-fault detection and protection applications.
Technical capability
Engineered around your project requirements
INDULF outdoor potential transformers are manufactured across a range of voltage, accuracy, burden and secondary configurations to meet the requirements of metering, protection and measurement applications.
Secondary voltage
02110 V · 110/√3 V · 110/3 V
Configured for the connected metering or protection system
Rated burden
03Up to 200 VA
Configured for metering, protection and measurement circuits
Accuracy class
040.2 / 0.5 / 1.0 / 3.0 / 3P / 5P / 6P
Metering and protection classes
Tank construction
05Live Tank / Dead Tank
Available according to application
Standard
06As per IS / IEC / ANSI
Project requirements
Why INDULF
From manufacturing to final testing, we control the process
Every INDULF transformer reflects controlled manufacturing, rigorous testing and a commitment to consistent quality and dependable performance.
- 01
CONTROLLED MANUFACTURING
Our instrument transformers are manufactured with controlled processes for winding, insulation, assembly and finishing, maintaining consistency from production through final inspection.
- 02
APPLICATION-LED ENGINEERING
Each transformer is configured around the required ratio, accuracy class, burden, insulation level and core arrangement for its intended protection or metering application.
- 03
IN-HOUSE TESTING
Every transformer is subjected to defined routine checks before dispatch through our in-house NABL-accredited testing facility.
- 04
QUALITY AT EVERY STAGE
Quality is maintained through defined inspection and control processes across materials, manufacturing, assembly and final inspection.
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Next step
Request a quote
Let's build the right potential transformer for your application.
Share your project requirement or specification with our team. We'll review the application and help you define the right voltage ratio, accuracy and configuration for your system.
- 01Send us your specification, project details or drawing.
- 02Our team reviews the application and confirms the right PT configuration.
- 03Once confirmed, your transformer moves forward with testing and project documentation.
Manufacturing range
Available specifications & configurations
The key parameters that define the performance and configuration of each outdoor potential transformer.
| Parameter | Available configurations |
|---|---|
| Type |
|
| Rated primary voltage |
|
| Rated secondary voltage |
|
| Rated output burden |
|
| Accuracy class — metering |
|
| Accuracy class — protection |
|
| Rated frequency |
|
| Number of secondary windings |
|
| Standards |
|