ZXHQ-Y: Advanced Transformer Field Calibrator

The ZXHQ-Y Transformer Field Calibrator is a versatile and high-performance instrument designed for comprehensive testing and calibration of both current transformers (CTs) and voltage transformers (VTs). Complying with international standards including IEC60044-1, IEC60044-2, IEC60044-6, GB1208, GB1207, GB16847, and C57.13, it provides engineers and technicians with a reliable solution for field and laboratory applications.

Compared to conventional test sets, which often specialize in either CT or VT testing, the ZXHQ-Y offers integrated functionality for both transformer types. Its ability to perform excitation characteristic tests, ratio and phase error verification, winding resistance measurement, secondary burden tests, and even transient characteristic analysis sets it apart from simpler devices that may only cover basic ratio or polarity checks.

Key Technical Capabilities:

For Current Transformers (CTs), the device supports:

• Excitation characteristic testing with an impressive maximum inflection point voltage of 45kV

• Turn ratio detection with an accuracy of up to 0.05% (for ratios 1–2000)

• Ratio and phase error verification

• Polarity check and secondary winding resistance measurement

• Secondary burden measurement

• 5% and 10% error curve measurement

• Transient characteristics analysis

• Automatic nameplate inference

• Core hysteresis loop measurement

For Voltage Transformers (VTs), it performs:

• Turns ratio detection

• Polarity verification

• Winding resistance measurement

• Secondary load measurement

Performance Highlights:

The ZXHQ-Y delivers output voltage up to 125V AC and current up to 5A RMS, with a 300VA power capacity. Its measurement accuracy stands out—current measurement error is less than ±0.1% + 0.01% FS, and voltage measurement error is within ±0.1% + 0.01% FS. The turn ratio measurement covers an extensive range from 1 to 30,000 with high accuracy across sub-ranges.

Notably, the instrument can measure secondary winding resistance from 0 to 8 kΩ with error within 0.2% RDG + 0.02% FS, and it supports secondary burden measurement for both CTs (0–160 Ω) and VTs (0–80 kΩ) with similarly high precision.

Comparison with Conventional Test Systems:

Unlike older calibrators that require multiple devices to perform tasks such as excitation testing, burden measurement, or error curve analysis, the ZXHQ-Y integrates all these functions into a single unit. It also exceeds typical capabilities with specialized tests like CT transient behavior analysis and automatic nameplate inference—features not commonly available in traditional test sets.

Applications:

The calibrator is essential for:

• Verification of CT/VT nameplate parameters

• Assessing the impact of CT transient characteristics on protection relays

• Validating transformer performance under actual load conditions

• Ensuring compliance with international standards

Technical Specifications Overview:

• Input Power: AC220V ±10%, 50/60Hz

• Output: 0.1–125V AC, 0.001–5A

• Maximum Inflection Point Voltage: 45kV

• Data Storage: Over 1000 groups

• Operating Conditions: -10°C to 50°C, ≤90% humidity

• Weight: 15kg

In summary, the ZXHQ-Y Transformer Field Calibrator represents a significant advancement in transformer testing technology, combining broad functionality, high accuracy, and user-friendly operation in one robust device. It is an invaluable tool for protection engineers, testing technicians, and utility professionals who require detailed and reliable transformer performance data.

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/