ZXHQ-B+ VF Transformer Tester: Advanced Power System Testing

The ZXHQ-B+ Variable Frequency Transformer Comprehensive Tester represents a cutting-edge solution developed through extensive market research and theoretical innovation for testing current transformers (CTs) and voltage transformers (PTs) in power systems. Equipped with high-performance DSP and ARM processors, this device integrates advanced manufacturing techniques to deliver exceptional stability, automation, and testing efficiency. Designed to meet the rigorous demands of modern electrical grids, it has established itself as a leading instrument for transformer evaluation in the power industry.

Key Features

 1.Comprehensive Functionality

Supports testing of protection-class, metering-class, and TP-class CTs, including Volt-Ampere Characteristics (excitation curves), ratio, polarity, secondary winding resistance, secondary burden, ratio error, and phase displacement.

Extends capabilities to protection-class PTs, enabling evaluation of excitation characteristics, ratio, polarity, and secondary winding resistance.

2.Automated Parameter Analysis

Computes critical parameters such as knee-point voltage/current, 10%/5% error curves, Accuracy Limit Factor (ALF), Instrument Security Factor (FS), secondary time constant (Tₛ), remanence factor (Kᵣ), and saturated/unsaturated inductance.

3.Standards Compliance

Adheres to GB20840.1 (IEC60044-1), GB20840.2 (IEC60044-6), and GB20840.3 standards, with automatic protocol selection based on transformer type and classification.

4.Low-Frequency Testing Technology

Employs advanced low-frequency excitation methods to address high knee-point voltages up to 45 kV in CTs, ensuring accuracy under extreme saturation conditions.

5.User-Centric Design

Features an intuitive Chinese-language graphical interface for streamlined operation.

Enables single-click testing for CT resistance, excitation, ratio, and polarity using unified wiring configurations (excluding burden tests).

6.Data Management

Stores up to 2,000 test datasets internally, with USB export functionality for PC-based analysis.

Includes dedicated software for generating standardized WORD reports.

7.Portability

Compact form factor (340×180×330 mm) and lightweight design (<9 kg) facilitate field deployment.

Technical Specifications

Applications in Power Systems
The ZXHQ-B+ excels in critical scenarios:

1.Protection Relay Calibration: Verifies CT/PT performance to ensure relay coordination during faults.

2.Metering System Validation: Assesses ratio and phase errors for revenue-grade accuracy.

3.Grid Maintenance: Detects winding degradation or core saturation via excitation curve analysis.

4.Compliance Testing: Streamlines adherence to IEC/GB standards for utility audits.
The ZXHQ-B+ redefines transformer testing by merging precision, versatility, and portability. Its ability to automate complex evaluations—from ALF determination to transient inductance measurements—significantly reduces testing time while enhancing data reliability. For technicians and engineers, this instrument provides an indispensable tool for maintaining grid stability, optimizing asset performance, and ensuring compliance with evolving international standards. As power systems evolve toward smarter grids, the ZXHQ-B+ stands poised to address next-generation testing challenges with its scalable architecture and advanced analytics.

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/