HY3N1-45 three-phase closed-type current transformers is the result of many years of technical accumulation of HEYI in the field of transformers, and is designed to meet the needs of modern power systems. This series of transformers uses high-quality materials and advanced manufacturing processes to ensure high precision, high stability and reliability, and is suitable for current measurement and protection in various complex environments HY3N1-45 three-phase closed-type current transformer.
HEYI is an enterprise with more than ten years of experience in the current transformers industry. We focus on the research and development and production of high-quality current transformers. Our HY3N1-45 three-phase closed-type current transformers with crystal connector is the company’s latest product, with excellent performance and reliable quality. This series of products adopts advanced manufacturing technology and high-quality materials to ensure its stability and accuracy in various complex environments. HEYI always adheres to customer demand-oriented, and is committed to providing better products and services to global customers. We continue to innovate, continuously improve product performance, and strive to maintain a leading position in the market.

HY3N1-45 three-phase closed-type current transformer

FAQ

1. Which energy meters are compatible with the HY3N1-45 three-phase current transformer?

The HY3N1-45 has a rated secondary output of 0.1A (100mA). It should be paired with an energy meter designed for a compatible 100mA CT input. Before ordering, check the meter’s input specification, CT ratio settings, input burden and connector pinout. It is not a direct replacement for a CT with a 1A or 5A secondary output.

2. What current ratios are available, and how do I choose the right one?

The HY3N1-45 is available with ratios of 250/0.1A, 400/0.1A and 600/0.1A. Select the ratio according to the circuit’s normal operating current and maximum expected current. Avoid unnecessary oversizing, and ensure the connected meter is configured with the same CT ratio.

3. What should I check before installing the HY3N1-45 in a distribution panel?

Check the conductor dimensions, CT window dimensions, phase spacing, mounting arrangement and available panel space against the product drawing. As a closed-type current transformer, it requires the primary conductors to pass through its openings. Installation therefore requires access to the conductor ends and an appropriate shutdown arrangement.

4. What are the accuracy class and rated burden of the HY3N1-45?

The listed HY3N1-45 models have Class 0.5 accuracy and a rated burden of 0.25VA. When selecting the meter and connecting cable, account for the combined secondary burden of the meter, cable and connections. Meeting the specified operating and burden conditions is necessary to achieve the stated accuracy.

5. How do I connect the HY3N1-45 crystal connector to a three-phase energy meter?

Follow the wiring diagrams for both the CT and the meter. Confirm the connector pinout, phase sequence and CT polarity before connection. A matching connector shape alone does not establish electrical compatibility. Use a cable with the correct wiring assignment, and verify that each CT channel corresponds to the appropriate meter phase.