Medium Voltage Instrument Transformers

Instrument transformers are critical components in modern electrical systems, designed to convert high currents or voltages into measurable, standardized values that are directly proportional and inphase with the primary signal. These transformers ensure that electrical measuring instruments, meters, and relays can safely and accurately monitor and protect high-voltage circuits. In addition to converting high voltages and currents, instrument transformers provide electrical insulation between measuring instruments and live high-voltage circuits, ensuring operator safety and equipment protection.

Our range of Medium Voltage Instrument Transformers offers precision, durability, and superior insulation for applications in substations, switchgear, and industrial installations. Each transformer is designed and manufactured to meet stringent international standards such as IS, IEC, or ANSI, ensuring reliable performance across diverse applications and environments.

Current Transformers (CT)

Current Transformers (CTs) are essential for the safe and accurate measurement of high currents in power systems, converting large primary currents into smaller, measurable secondary currents. These transformers play a crucial role in protecting and monitoring electrical networks by enabling measuring instruments and protective relays to operate safely without direct exposure to high voltage.

Our CTs are built using high-quality materials, ensuring precision, durability, and stability over longterm use. Designed for system voltages up to 33kV, they offer multiple secondary current options to match your specific requirements, ensuring compatibility with your existing measuring devices.

Key Features:

• System Voltage Rating: Suitable for systems with voltages ranging from 3.6kV to 33kV.
• Primary Current Range: Our CTs are capable of handling primary currents from 5A to 5000A, catering to a wide array of applications from small to large-scale industrial systems.
• Secondary Current: Available in 1A or 5A, or can be customized as per client specifications, ensuring compatibility with various protective relays, meters, and instruments.
• Accuracy Class: Our CTs are manufactured to meet stringent accuracy requirements. For metering applications, the accuracy classes range from 0.2s, 0.2, 0.5, 0.5s, 1.0, as per IS, IEC, or ANSI standards, providing high accuracy for energy metering and billing systems. For protection purposes, we offer classes 5P10, 5P20, 10P10, ensuring robust protection of power systems by accurately triggering protective relays during fault conditions.
• Secondary Burden: We offer a wide range of secondary burden options, from 2.5 to 20 VA, ensuring adaptability to different system requirements and measurement loads.
• Instrument Safety Factor (ISF): Less than 5, ensuring that the CT does not saturate under normal operating conditions, maintaining accuracy and reliability.
• Frequency Range: Our current transformers are suitable for both 50Hz and 60Hz systems, ensuring compatibility with power systems worldwide.
• Maximum Insulation Level: Our CTs are rated up to 36/70/170 kV, providing exceptional insulation and protection in medium-voltage systems.

Applications:

• Used for accurate measurement and monitoring of high currents in medium-voltage electrical networks.
• Essential in protection schemes, where they relay precise current information to protective relays, ensuring fast and accurate fault detection.
• Ideal for energy metering, ensuring accurate billing in industrial, commercial, and utility settings.

Voltage Transformers (VT)

Voltage Transformers (VTs), also known as Potential Transformers (PTs), are designed to step down high voltage levels to measurable, standardized values suitable for metering, relaying, and other control systems. Our VTs are essential in providing accurate voltage measurements, protecting both instruments and personnel from direct high-voltage exposure while delivering reliable performance in medium-voltage power systems.

Our VTs are precision-engineered to operate in high-voltage environments, ensuring safety, accuracy, and longevity. With various accuracy classes and a wide range of system voltages, these transformers are ideal for use in substations, industrial plants, and power distribution networks.

Key Features:

• System Voltage Rating: Our voltage transformers support system voltages ranging from 3.6kV to 33kV, making them suitable for various applications, including power generation, transmission, and distribution.
• Rated Frequency: Our VTs are compatible with both 50Hz and 60Hz systems, ensuring flexibility across different regions and power grids
• Maximum Insulation Level: Rated up to 36/70/170 kV, our VTs provide exceptional insulation, ensuring safe and reliable operation even in high-voltage environments.
• Thermal Current Rating: These transformers are designed to operate continuously at up to 120%, 150%, or 200% of the rated thermal current, ensuring that they can withstand temporary overloading without compromising performance or safety.
• Protection Accuracy Classes: For protection applications, we offer accuracy classes 3P and 5P, ensuring reliable performance in protection schemes where accurate voltage sensing is critical for activating protective relays during fault conditions.

Applications:

• Widely used in medium-voltage networks for stepping down high voltages to measurable levels for metering and relaying.
• Essential in protective relay schemes for sensing abnormal voltage conditions and triggering appropriate safety measures.
• Ideal for energy metering in commercial, industrial, and utility applications, ensuring accurate and reliable voltage measurements.

Advantages of Our Medium Voltage Instrument Transformers:

1. High Accuracy and Precision: Our transformers are designed to deliver highly accurate measurements for both metering and protection applications, ensuring reliable and precise data.

2. Superior Insulation and Safety: With insulation levels up to 36/70/170 kV, our transformers are built to handle the rigors of high-voltage environments, protecting both personnel and equipment from electrical hazards.

3. Customizable Solutions: We offer flexible design options, with customizable secondary currents, burdens, and accuracy classes, ensuring that our transformers meet the specific needs of your system.

4. Durability and Longevity: Manufactured using high-quality materials and advanced manufacturing processes, our instrument transformers offer long-term reliability with minimal maintenance, reducing the total cost of ownership.

5. Compliance with International Standards: All our transformers are designed and tested in accordance with the latest IS, IEC, or ANSI standards, ensuring global compatibility and meeting the strictest safety and performance requirements.