HY3N1-70 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 HY3N1-70 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 HY3N1-70 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.
HY3N1-70 three-phase closed-type current transformers with crystal connector
Applications
- Current measurement, monitoring and protection for electrical wiring and equipment.
- Currentand power measurement for electric motors,lighting, air compressor, heating
and ventilation system. - Current, power and energy monitoring device.
- Relay protection device.
| Model | Ratio(A) | Burden(VA)/Class0.5 |
| HY3N1-70 | 400/0.1 | 0.25 |
| HY3N1-70 | 600/0.1 | 0.25 |
| HY3N1-70 | 800/0.1 | 0.25 |
FAQ
1. What current ratios are available for the HY3N1-70 three-phase current transformer?
The HY3N1-70 is available with current ratios of 400/0.1A, 600/0.1A, and 800/0.1A. Select the ratio according to your circuit’s operating current and measurement range, and configure the connected meter with the matching CT ratio.
2. Can the HY3N1-70 connect directly to a meter with a 1A or 5A CT input?
The HY3N1-70 has a rated secondary output of 0.1A and requires a compatible meter input. It should not be treated as a direct replacement for a 1A or 5A CT. Before ordering, check the meter’s input specifications, connector requirements, and supported CT ratios.
3. What should I check before installing the HY3N1-70 on three-phase busbars?
Check the busbar width, thickness, phase spacing, and available installation space against the product’s dimensional drawing. As a closed-type current transformer, the HY3N1-70 requires the primary conductors to pass through its openings. Installation on existing busbars may therefore require disconnection under safely isolated conditions.
4. How do I connect the HY3N1-70 to a three-phase monitoring meter?
Follow the confirmed connector pinout and wiring diagram for both the CT and the meter. Match each phase output to the corresponding meter input and maintain the correct polarity. Connector appearance alone does not confirm compatibility; verify the pin assignments before connection.
5. What accuracy class and rated burden does the HY3N1-70 offer?
The listed HY3N1-70 models have Class 0.5 accuracy and a rated burden of 0.25VA. When selecting the meter and connecting cable, account for their combined secondary burden. The complete circuit must meet the specified burden requirements to support the stated measurement accuracy.
