Advanced On-Site Current Transformer Test Systems: ZXCT-H Series

Introduction
Accurate energy metering in power plants, substations, and high-consumption users directly impacts economic interests across generation, transmission, and distribution systems. To ensure precision, metering devices must comply with standards such as SD109 and DL/T448-2000. Traditional methods for testing current transformers (CTs) and voltage transformers (VTs) are often cumbersome, requiring heavy equipment and complex setups. The ZXCT-H series current transformer test systems, developed through extensive research and advanced engineering, offer a groundbreaking solution for on-site verification.

Key Advantages Over Conventional Methods
Unlike traditional approaches that rely on separate standard CTs, booster sets, load boxes, and调压 control units, the ZXCT-H series integrates all necessary functions into a single portable device. This eliminates the need for bulky accessories and reduces setup time, significantly enhancing field efficiency. Key features include:

1.Recursive Error Measurement: Allows direct on-site CT verification without external standard transformers.

2.Built-In High-Accuracy Reference: Includes an internal 0.05-class standard CT and VT simulator, enabling precise ratio and excitation error measurements.

3.Frequency-Isolated Power Supply: Uses off-frequency testing to avoid grid interference and ensure reliability.

4.Comprehensive Testing Capabilities: Covers CT ratio, polarity, winding resistance, and DC resistance tests, with blind ratio measurement for unknown transformers.

5.Automated Workflow: Features intuitive touchscreen controls, automatic error judgment, and direct printing of compliance reports.

Technical Performance

1.Accuracy: Meets 1/3 of the error limit of the tested CT, with models offering 0.05S (ZXCT-HA) or 0.02S (ZXCT-HB) class precision.

2.Test Range: Supports ratios from 5A/5A to 31500A/5A or 5A/1A to 6300A/1A, extendable via ampere-turn methods.

3.Load Range: 2.5VA to 300VA at power factors of 0.1–1.0.

4.Additional Functions: VT ratio/polarity testing, impedance/admittance measurement, and data storage for 1000 records.

Comparison of Models
The ZXCT-HA (0.05S class) and ZXCT-HB (0.02S class) cater to different accuracy requirements, with the HB model providing higher precision for critical applications. Both models feature rugged design, optional battery operation (12+ hours runtime), and compliance with safety standards.

Conclusion：
The ZXCT-H series revolutionizes on-site CT testing by combining portability, accuracy, and multifunctionality. It reduces labor intensity, minimizes equipment dependencies, and ensures reliable metering validation aligned with industry standards.

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/