Voltage class
01Up to 33 kV
Medium-voltage metering applications
Combined Instrument Transformers
CombinedCT-PT Metering Units
INDULF manufactures combined CT-PT metering units for accurate energy measurement across utility, industrial and infrastructure applications up to 33 kV. Designed as an integrated metering assembly, each unit brings current and voltage transformation together for consistent measurement, simplified installation and dependable long-term performance.
Voltage class
UP TO 33 kV
Configuration
CT + PT
Overview
Current & voltage transformation, built into one
A CT-PT metering unit combines current and voltage transformation in a single integrated assembly, providing the measurement interface required for accurate energy metering at utility, feeder, boundary and industrial metering points. Bringing both functions together simplifies the installation while maintaining the accuracy required for dependable energy measurement.
INDULF manufactures CT-PT metering units around the requirements of each metering application, with current and voltage ratios, accuracy classes, burdens and configuration coordinated as one complete assembly. This integrated approach provides consistency across the transformer pair while allowing the finished unit to be matched to the project's metering and tariff requirements.
Quality remains integral to the manufacturing process, with defined inspection and routine testing carried out before dispatch. INDULF's in-house testing capability, supported by NABL-accredited facilities, provides documented verification of product performance, while technical records support inspection, approval and commissioning.
- CT and PT integrated into one coordinated metering assembly
- Current and voltage ratios matched for accurate energy measurement
- Manufactured, tested and documented for project approval and commissioning
What we manufacture
Built as one integrated metering unit
Oil-immersed construction, integrated CT and PT transformation, and application-focused configuration come together in a single metering assembly.
Construction
Oil-Immersed
Designed for reliable outdoor metering applications and long-term field operation.
Integration
CT + PT in One Unit
Current and voltage transformation combined in a single coordinated assembly.
Application
Utility & Industrial Metering
Built for boundary, feeder, bulk-supply and industrial energy measurement.
Configuration
Application-Specific
Ratios, accuracy and metering arrangements configured around the project requirement.
Technical capability
Built around your metering requirements
Our CT-PT metering units are manufactured across defined electrical, accuracy and installation parameters.
Accuracy class
020.2 / 0.2S / 0.5
High-accuracy metering configurations
Power-frequency withstand
0328 kV · 50 kV · 70 kV
Insulation withstand capability
Impulse withstand
0475 · 125 · 170 kVp
Lightning impulse withstand levels
Mounting
05Pole / Platform Mounted
Configurations for different installation requirements
Construction
06Oil-Immersed CT + PT
Integrated current and voltage transformation in one unit
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.
Find the right instrument transformer
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Current sideOutdoor Current TransformersExplore
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Next step
Request a quote
Tell us your metering requirement. We'll build the right unit.
Share your project specification or metering requirement with our team. We'll review the application and confirm the right CT-PT configuration for your installation.
- 01Send your project specification, drawing or metering details.
- 02We review the CT and PT requirements and confirm the appropriate configuration.
- 03Your integrated metering unit is manufactured, tested and prepared with the required documentation.
Manufacturing range
Available specifications & configurations
The key parameters that define the performance and configuration of each CT-PT metering unit.
| Parameter | Available configurations |
|---|---|
| Type |
|
| Rated system voltage |
|
| Power frequency withstand |
|
| Impulse withstand |
|
| Accuracy class |
|
| Rated frequency |
|
| Mounting |
|
| Standards |
|