Description

The Eltech 11 kV HTCT 5/5A Class 0.2S is a High Tension Current Transformer (HTCT) designed for use in 11 kV electrical systems. This type of current transformer is used to measure electrical current in high-voltage power distribution networks while providing safe, accurate readings for metering, protection, and monitoring. Here’s a breakdown of the key specifications and features of this transformer:

Key Specifications of Eltech 11 kV HTCT 5/5A Class 0.2S:

1. Voltage Rating:
   • 11 kV: This current transformer is designed for use in 11 kV systems, which are commonly found in medium-voltage power distribution networks, industrial facilities, and electrical substations.
2. Current Ratio:
   • 5/5A:
     • Primary Current: 5 A (the current flowing through the high-voltage side).
     • Secondary Current: 5 A (the current produced on the secondary side, scaled down for measurement and monitoring purposes).
     • In this 1:1 ratio, the primary current (5 A) is directly mirrored by the secondary current (5 A). This can be useful in systems where the measurement needs to reflect the exact primary current for precise monitoring or metering.
3. Accuracy Class:
   • Class 0.2S:
     • Accuracy Class 0.2S means the current transformer has a high level of accuracy, providing an error margin of ±0.2% under normal operating conditions. This level of accuracy ensures that the CT can be used for high-precision applications, such as revenue metering, billing, and monitoring energy usage.
     • The S in the accuracy class (0.2S) indicates that it is suitable for special metering applications that require very precise measurements, such as for power billing and energy management.
4. Application:
   • Current Measurement: This CT is used to measure high electrical currents in an 11 kV power system, stepping down the current from the primary high voltage to a secondary level that is safe for use with standard metering and protection devices.
   • Energy Metering: The Class 0.2S accuracy class makes it ideal for energy metering applications, where precise current measurement is needed for accurate billing, load monitoring, and energy consumption tracking.
   • Protection: Used in conjunction with protection relays, it can detect overcurrent situations, enabling the system to take action (e.g., activating circuit breakers) to protect electrical equipment from damage.
   • Power Distribution Networks: Commonly used in substations and medium-voltage power distribution networks where monitoring and protection are critical.
   • Compliance and Standards:
     • The Eltech 11 kV HTCT 5/5A Class 0.2S meets international standards such as IEC 61869 or IS 2705 for current transformers, which define the construction, testing, and performance parameters to ensure safety, accuracy, and reliability in high-voltage environments.

Applications in Industry and Power Systems:

• Energy Metering: Essential for precise energy measurement in commercial, industrial, and utility power systems. The Class 0.2S accuracy ensures that measurements for billing or monitoring purposes are reliable and accurate.
• Protection Systems: Integral to electrical protection systems, used in combination with protective relays to detect overcurrent conditions and initiate appropriate actions (such as shutting down the system or activating circuit breakers) to protect equipment.
• Power Distribution: Used in substations and power distribution systems for current measurement and protection. It provides a scalable, reliable means of monitoring electrical currents in a medium-voltage grid.
• Industrial Power Systems: Used in factories, large industrial plants, and critical infrastructure facilities for real-time monitoring and ensuring electrical systems operate within safe current limits.

.