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Product Overview: Kampa’s Medium Voltage Instrument Transformers
Kampa’s medium voltage instrument transformers deliver precision metering and reliable protection engineered specifically for modern distribution networks. Our MV range supports system voltages from 3.3 kV up to 36 kV, covering common network levels including 6.6 kV, 11 kV, and 24 kV. This broad scope ensures compatibility across diverse industrial, utility, and commercial installations.
At the core of our design is the use of hydrophobic cycloaliphatic epoxy resin (HCEP), a cutting-edge insulation material renowned for outstanding outdoor durability and resistance to pollution. For indoor applications, Kampa employs advanced vacuum casting techniques that create void-free, high-integrity insulation. This ensures superior reliability and high partial discharge immunity in demanding environmental conditions.
Our MV instrument transformers—comprising MV Current Transformers (CT) and MV Voltage Transformers (VT/PT)—are tailored to meet stringent accuracy and safety standards, making them ideal for precision metering, protection, and control within switchgear and distribution frameworks worldwide.
Types of Medium Voltage Instrument Transformers
At Kampa, our range of medium voltage instrument transformers includes several types designed to meet diverse metering and protection needs in distribution networks. Here’s a quick overview:
| Transformer Type | Design Variants | Key Features |
|---|---|---|
| MV Current Transformers (MV CT) | Block-type, Ring-core/window-type, Bushing-type | Single and multi-ratio cores for metering & protection |
| MV Voltage Transformers (MV VT/PT) | Single-pole (phase-to-earth), Double-pole (phase-to-phase) | Available fused and unfused options |
| Combined Metering Units | Integrated CT and VT in one compact unit | Space-saving solution for precise metering |
The MV CTs support different core constructions, including high accuracy metering CTs and robust protection class CTs, suiting both indoor switchgear and outdoor installations. For voltage measurement, our MV VTs (or PTs) come in versatile insulation designs with the option of fused protection, ideal for varying system requirements.
If you need compact setups without sacrificing functionality, our combined CT VT units integrate both current and voltage measurement in one device, simplifying installation while ensuring reliable performance.
For more details on specific MV voltage transformer designs, take a look at our single-phase fully insulated casting voltage transformer, perfect for precision metering applications.
Technical Specifications & Performance Ratings of Medium Voltage Instrument Transformers
Kampa’s medium voltage instrument transformers cover a broad range of system voltages and performance ratings, designed to meet the demands of global distribution networks. Here’s a quick overview of the key technical specs:
| Feature | Details |
|---|---|
| System Voltage (Um) | 3.6 kV, 7.2 kV, 12 kV, 17.5 kV, 24 kV, 36 kV |
| Insulation Level (BIL/LI) | Lightning Impulse Withstand: 40 kV, 75 kV, 95 kV, 170 kV |
| Power Frequency Withstand | Tested for both dry and wet conditions |
| Rated Frequency | 50 Hz / 60 Hz |
| Accuracy Classes | Metering: 0.2s, 0.2, 0.5s, 0.5 Protection: 5P10, 5P20, 10P10, PX Class |
| Short-Time Thermal Current (Ith) | Up to 31.5 kA for durations of 1 or 3 seconds |
These specs apply for both MV Current Transformers (MV CT) and MV Voltage Transformers (MV VT/PT) across various installation types—whether dry epoxy resin cast or oil-immersed units.
For switchgear applications requiring solid reliability under harsh conditions, our instrument transformers maintain high partial discharge immunity and consistent accuracy. This ensures secure metering and protection in indoor switchgear or outdoor pole-mounted metering units.
Interested in performance details of MV voltage transformers in GIS environments? Check our dedicated outdoor voltage transformer solutions built specifically for reliable high-voltage operations.
This combination of specifications guarantees superior performance for medium voltage instrument transformers in distribution and industrial electrical networks worldwide.
Construction & Insulation Technology of Medium Voltage Instrument Transformers
Kampa’s medium voltage instrument transformers feature advanced construction and insulation technologies tailored for reliability and long service life across diverse environments.
Epoxy Resin Cast (Dry Type):
Our MV CT and MV VT units use a state-of-the-art vacuum casting process to create void-free insulation with excellent partial discharge immunity. This results in a maintenance-free design ideal for both indoor instrument transformers in switchgear and outdoor pole-mounted metering units. The use of hydrophobic cycloaliphatic epoxy resin (HCEP) enhances durability under harsh weather conditions, supporting systems from 3.3kV up to 36kV.
Oil-Immersed Transformers:
For applications demanding high current burden or exposed to extreme outdoor conditions, our oil-immersed MV instrument transformers provide hermetically sealed insulation. This design ensures stable performance and prolonged life even in demanding, high-moisture environments.
SF6 Gas Insulated Units:
Compatibility with Gas Insulated Switchgear (GIS) is critical in modern distribution networks. Our SF6 gas insulated instrument transformers are built to fit seamlessly within GIS layouts, offering compactness and superior insulation while maintaining high accuracy metering and protection standards.
These construction options ensure Kampa’s instrument transformers meet diverse installation needs, whether integrated inside switchgear or installed outdoors in challenging environments. For more on our dry-type and hermetically sealed transformers, explore our detailed product pages such as the JDZX9-35 Single-Phase Hermetically Casted Voltage Transformer.
Applications and Installation Environments
Kampa’s medium voltage instrument transformers are designed to perform reliably across various installation settings. They work seamlessly in Air Insulated Switchgear (AIS) panels, offering precision metering and protection in traditional switchgear environments. For compact and high-reliability setups, our transformers are also tailored for Gas Insulated Switchgear (GIS) systems, ensuring stable operation even in confined spaces.
Outdoor applications benefit from our rugged pole-mounted metering units, engineered with durable epoxy resin cast or oil-immersed insulation to withstand harsh weather conditions. These units are ideal for distribution networks that require dependable metering and protection in exposed environments.
Additionally, Kampa’s MV instrument transformers serve critical roles in power generation plants and industrial substations, meeting demanding accuracy and endurance standards. Whether it’s for a 11kV current transformer in an industrial setup or a combined CT VT unit in a substation, our portfolio supports a wide range of medium voltage applications with proven reliability.
For more information on integrating these transformers into switchgear and substation projects, explore our detailed solutions on switchgear and substation solutions. If you’re considering dry type and oil-immersed options for industrial use, check out our comparison of dry-type transformers vs oil-immersed types.
Quality Assurance & Standards Compliance
Kampa’s medium voltage instrument transformers are built to meet the highest industry standards, ensuring reliability and safety in your distribution network. Our MV current transformers and MV voltage transformers fully comply with IEC 61869-1, IEC 61869-2 (for CTs), and IEC 61869-3 (for VTs). This guarantees that each unit performs accurately under normal and fault conditions.
To maintain strict quality control, every instrument transformer undergoes rigorous routine testing at our Kampa laboratories, including:
- Partial Discharge measurement to detect insulation defects early
- Polarity and winding resistance checks to confirm accurate phase alignment and winding integrity
- Power-frequency withstand tests under both dry and wet conditions, confirming insulation strength
These thorough quality checks ensure that our epoxy resin cast transformers, oil-immersed units, or SF6 gas-insulated models deliver dependable performance in both indoor and outdoor installation environments. For more on our dry type instrument transformers and their robust insulation, see our detailed indoor cast resin current transformer solutions.
By choosing Kampa’s MV instrument transformers, you’re investing in equipment that meets strict international standards backed by proven testing protocols for years of trouble-free service.
Request a Quote / Custom Specifications
Need specific medium voltage instrument transformers tailored to your project? At Kampa, we offer custom solutions for MV Current Transformers and MV Voltage Transformers to fit your exact requirements. Whether you need custom ratios, unique dimensions, or special creepage distances for harsh environments, our engineering team is ready to help. Just reach out to discuss your specifications, and we’ll design instrument transformers that meet your precise metering and protection needs without compromising quality or reliability.
For more details on our customization capabilities, check out our dedicated page on custom dry type transformer options. This ensures you get the exact MV CT or MV PT that suits your system, from 3.3kV up to 36kV voltage levels.