Table of Contents
High Voltage Instrument Transformers (CT & PT)
Kampa engineers design high voltage instrument transformers, including Current Transformers (CT) and Potential Transformers (PT), to deliver precise metering and reliable protection solutions across critical electrical systems. These transformers are core components in power monitoring and safety, accurately stepping down high voltages and currents to standardized levels suitable for measurement and relay devices.
Our High Voltage Instrument Transformers feature advanced core technology that minimizes saturation and maintains signal integrity under varying load conditions. This ensures exceptional accuracy — vital for metering classes such as 0.2S and protection classes like 5P10 — safeguarding system performance and operational reliability.
At Kampa, these instrument transformers comply with stringent IEC 61869 standards, guaranteeing insulation robustness, dielectric withstand strength, and long-term stability essential for high voltage environments. This combination of precision and durability forms the foundation of dependable power system monitoring and protection solutions.
Product Range & Classifications of Instrument Transformers
Kampa offers a comprehensive range of instrument transformers designed to meet varied metering and protection needs in electrical systems.
Current Transformers (CT): Types and Winding Ratios
Our Current Transformers (CTs) come in multiple types including single-core, split-core, and zero sequence current transformers (ZCT). They are available in a variety of winding ratios to suit different primary current ratings, enabling precise current measurement and reliable protection in all applications. Whether you need a medium voltage CT or specialized protection class CTs like 5P10, we have customizable solutions to fit your load and system requirements.
Potential / Voltage Transformers (PT/VT): Types and Functions
We provide a wide selection of Potential Transformers (PTs) or Voltage Transformers (VTs) that accurately step down high voltages for safe measurement and relay control. These come in dry-type epoxy resin cast or oil-immersed designs, ensuring stable voltage transformation and insulation integrity. Our PT/VT units comply with strict accuracy classes, including metering classes like 0.2S, to ensure precise voltage readings for control and billing.
Combined Instrument Transformers: Space-saving Units
For optimized panel design and easier installation, Kampa offers combined instrument transformers that integrate both CT and PT in a single compact unit. These space-saving devices reduce wiring complexity and improve system reliability, perfect for modern switchgear applications and substations.
Explore our full selection of advanced dry-type voltage transformers to find solutions tailored to your project needs.
Technical Specifications & Performance Data
When choosing high voltage instrument transformers like Current Transformers (CT) and Potential/Voltage Transformers (PT/VT), understanding their technical specs is key. Here’s a quick breakdown:
Accuracy Classes: Metering and Protection
- Metering CTs & PTs often feature classes such as 0.2, 0.5, or 0.2S, ensuring precise measurement for billing or monitoring.
- Protection CTs have classes like 5P10 or 10P, designed for reliable relay operation during faults.
- Accuracy influences the trustworthiness of readings or protection activation—always pick the class matching your system needs.
Burden and Output Ratings
- Burden VA Rating refers to the load the transformer can handle without accuracy loss; it varies by application.
- Most instrument transformers can be customized with different burdens and output voltages (commonly 1A or 5A) to fit your system.
- Proper burden ensures optimal performance—overloading affects accuracy and can lead to protection issues.
Insulation & Dielectric Withstand
- Insulation quality matters for durability and safety. We use high-grade materials like epoxy resin cast for dry types and advanced oils for oil-immersed versions.
- Dielectric withstand levels protect against voltage surges and ensure transformer integrity during transient conditions.
- Compliance with standards like IEC 61869 guarantees insulation robustness.
| Specification | Typical Values |
|---|---|
| Metering Accuracy Classes | 0.2, 0.5, 0.2S |
| Protection Accuracy Classes | 5P10, 10P |
| Burden Ratings (VA) | Customized from 1 to 30+ VA |
| Output Secondary Current | 1A or 5A standard |
| Insulation Type | Epoxy resin cast / Oil immersed |
| Dielectric Withstand Voltage | According to IEC 61869 requirements |
For more details on materials and dry-type transformer specifications, check our dry-type transformer specification guide. This helps you select the right insulation and dielectric features for your application.
Application Areas of Instrument Transformers
High voltage instrument transformers like Current Transformers (CT) and Potential/Voltage Transformers (PT/VT) are essential across various sectors. Here’s where they play a crucial role:
- Power Substations: Instrument transformers ensure accurate metering and reliable protection in high-voltage environments, helping maintain grid stability and safety.
- Switchgear Panels: These transformers provide essential current and voltage measurements for protective relays and control systems within switchgear, including auxiliary components critical for operation. For specialized switchgear applications, you can explore our switchgear and substation solutions.
- Industrial Metering: Medium voltage CTs and PTs are commonly used for precise monitoring and controlling of industrial electrical loads, ensuring efficient energy use and safeguarding equipment.
- Renewable Energy Grid Connections: Instrument transformers support the integration of renewable power sources by enabling accurate measurement and protection in grid tie-in points, ensuring smooth and safe energy flow.
These applications highlight the versatility of instrument transformers, from traditional power distribution to modern renewable energy setups, supporting both metering accuracy class 0.2S and protection class 5P10 requirements.
Manufacturing Standards & Quality Assurance
Kampa Instrument Transformers are built to meet the highest manufacturing standards, ensuring safe and reliable performance worldwide. All our products comply with international norms such as IEC 61869, IEEE, and ANSI standards. This adherence guarantees that every Current Transformer (CT), Potential Transformer (PT), and combined units perform consistently to their specified metering and protection accuracy classes.
At our state-of-the-art Kampa facility, every transformer undergoes rigorous testing before shipment. This includes checking burden VA ratings, insulation integrity, and dielectric withstand voltage levels to meet or exceed industry requirements. Our quality assurance process covers both epoxy resin cast transformers and oil immersed instrument transformers, ensuring durability in diverse environments and applications.
By choosing Kampa, you’re investing in instrument transformers verified for strict compliance and reliable high-voltage performance every time. For more on our reliable solutions in high-voltage equipment, explore our range of dry-type transformers designed for medium and high voltage applications.
Dimensions and Installation
We provide clear, detailed technical drawings and downloadable datasheets with every High Voltage Instrument Transformer, including both Current Transformers (CT) and Potential Transformers (PT/VT). These resources come with precise dimensions to help you plan your setup accurately.
Downloadable Datasheets and CAD Files
- Access full CAD files for seamless integration into your design software.
- Datasheets include key dimensions, mounting details, and electrical specs.
- Perfect for engineers and installers to ensure a perfect fit.
Mounting Flexibility: Indoor and Outdoor Use
Our instrument transformers are designed for varied installation environments:
| Mounting Type | Key Features | Recommended Use |
|---|---|---|
| Indoor Mounting | Compact design, easy integration in switchgear | Control rooms, substations |
| Outdoor Mounting | Weather-resistant housing, robust insulation | Outdoor substations, renewable grids |
This flexibility supports installation in tight spaces as well as harsh conditions, ensuring dependable performance wherever you need it.
For example, our epoxy resin cast Current Transformers are ideal for indoor setups, as seen in the reliable LZZBJ9-10 10kV indoor cast resin current transformer line. For outdoor applications, similar considerations apply when selecting appropriate enclosures and insulation levels.
With clear dimensional data and versatile mounting options, installing your instrument transformer system is straightforward and efficient.
Why Choose Kampa Instrument Transformers?
Kampa offers a solid choice for High Voltage Instrument Transformers, trusted worldwide for quality and performance. Here’s why our customers rely on us:
Customization Options
We understand every project has unique needs. That’s why we provide tailored options for:
- Ratio: Select from a wide range of current and voltage transformer ratios.
- Burden: Customize the burden VA rating to fit your meter or relay requirements precisely.
- Dimensions: Designed to fit your installation space, including compact units and combined CT/PT options.
Short Lead Times and Global Shipping
- Fast production schedules to meet tight project deadlines.
- Reliable worldwide delivery, ensuring your High Voltage Instrument Transformer arrives on time, anywhere.
Proven High-Voltage Performance Track Record
- Years of experience manufacturing instrument transformers that meet or exceed IEC 61869, IEEE, and ANSI standards.
- Consistent accuracy and durable insulation for reliable metering and protection.
- Trusted by utilities, industrial sectors, and renewable energy projects for flawless operation under demanding conditions.
Choose Kampa for an instrument transformer partner that supports your project with precision, flexibility, and dependable high-voltage performance. For details on current transformer options, explore our comprehensive Current Transformers range.
Frequently Asked Questions (FAQ)
Difference Between Metering and Protection CTs
- Metering CTs are designed for accurate measurement with high precision classes like 0.2S or 0.5, ensuring reliable billing and monitoring.
- Protection CTs focus on durability and fast response under fault conditions, typically rated with protection accuracy classes such as 5P10 or 10P20.
| Feature | Metering CT | Protection CT |
|---|---|---|
| Accuracy Class | 0.2, 0.5 (high precision) | 5P10, 10P (fault tolerance) |
| Purpose | Billing, load monitoring | Fault detection, relay triggering |
| Output | Stable under normal currents | Withstands high fault currents |
Selecting the Correct Burden
- Burden is the load (VA) connected to the CT or PT secondary.
- Choosing the right burden VA rating is critical for accuracy and safety.
- Undersizing burdens can cause inaccurate readings; oversizing leads to inefficiency and higher costs.
- Customer-specific burden ratings are common, so always consult the transformer’s specification sheet.
Types Offered: Oil-immersed vs Dry-Type
- Oil-immersed Instrument Transformers use mineral oil for insulation and cooling, suitable for high-voltage applications. They often have longer life but require maintenance due to oil handling.
- Dry-Type Instrument Transformers, such as epoxy resin cast types, use solid insulation and are maintenance-free with better environmental safety.
- Dry types are often preferred for indoor installation and medium voltage ranges.
- Both types comply with international standards like IEC 61869 to ensure safety and reliability.
For more on dry-type transformer insulation and technology, check out Kampa’s detailed resources on dry-type transformer insulation and dry-type transformer core technology.
Ready to Configure Your Instrument Transformer System?
If you’re looking to tailor your high voltage instrument transformer setup, Kampa is here to help. Whether you need custom Current Transformers (CT), Potential Transformers (PT), or combined instrument transformer units, our engineering support team will guide you through selecting the right specifications — including accuracy classes, burden VA ratings, and insulation levels.
Contact Kampa Engineering Support today to discuss your project requirements or to get expert advice on choosing the best instrument transformer for your application. We also offer easy-to-request quotes and detailed product information to simplify your decision-making process.
Start your configuration now and experience proven high-voltage performance with Kampa’s reliable, precision metering and protection solutions.