ZXHL Series Standard Current Transformer for Metering and Calibration

The ZXHL Series Standard Current Transformer is a precision instrument designed for verifying the accuracy class of current transformers that are two levels lower or less. It serves as a reference device in testing and calibration setups across power systems and electrical laboratories.

Comprising a primary and secondary winding, the ZXHL transformer requires strict adherence to the terminal markings during installation. Polarity terminals L1 (primary) and K1 (secondary) must be correctly connected to ensure accurate measurement. An additional terminal, La, serves as the polarity reference when the conductor must pass through the core.

Key Features:

1.Allows users to perform verification based on the standard current ratio printed on the nameplate.

2.Supports self-calibration at 5/5A or 1/1A ratios.

3.Equipped with casters for improved mobility and ease of handling.

Technical Specifications:

1.Operating Temperature: –5 °C to +40 °C

2.Humidity: <80%

3.Rated Capacity: 5 VA

4.Power Factor: cosφ = 0.8 (lagging)

5.Rated Current: Supports long-term operation at full rating; conductors above 150A must pass through the core

6.Weight: <20 kg

7.Standard Current Ratios: 0.1A–10000A / 5A or 1A

8.Dimensions: 280 mm × 60 mm × 60 mm

Comparison with Conventional Current Transformers:
Unlike general-purpose current transformers, which are typically used for measurement or protection, the ZXHL series is specifically engineered for calibration purposes. It offers higher accuracy stability and lower phase error, making it suitable for validating other industrial or metering-grade transformers. While standard CTs may have larger sizes and higher VA ratings for field applications, the ZXHL emphasizes portability, self-calibration capability, and precise ratio retention under varying loads.

Conclusion:
The ZXHL Series Standard Current Transformer is an essential tool for technicians and engineers involved in maintaining accuracy in current measurement systems. Its robust design, mobility, and calibration flexibility make it a reliable reference in testing environments.

GDZX is a manufacturer of power detection equipment, offering a diverse range of products with comprehensive models and providing professional technical support. Contact us at +86-27-6552607 or +86-17396104357.Website: http://en.gdzxdl.com/