ZX-SBC : A Portable High-Precision Solution for Power Transformer Testing

Introduction

Power transformers are core equipment in power generation, transmission and distribution systems, and transformation ratio testing is a mandatory and critical item for transformer factory inspection, installation commissioning, operation maintenance and fault diagnosis. Traditional transformer ratio bridge test methods have long been limited by cumbersome operation, poor portability, low test efficiency and insufficient adaptability to field working conditions, which can no longer meet the high-efficiency and high-precision testing requirements of modern power systems. The ZX-SBC hand-held transformer ratio tester, as an innovative portable testing instrument, effectively overcomes the shortcomings of traditional testing solutions, providing a new technical approach for on-site transformer testing in the power industry.

Core Performance Advantages

The ZX-SBC hand-held transformer ratio tester is fully optimized for field application scenarios, with significant performance advantages over traditional testing equipment. The instrument is equipped with a large-screen high-resolution LCD display, which clearly presents test data and menu prompts even in complex field light environments. It adopts a lithium battery power supply scheme compatible with external AC charging, fully adapting to the power supply conditions of outdoor field sites without fixed power sources. With a built-in English menu prompt system, the instrument realizes intuitive and easy operation, which greatly reduces the learning threshold for operators and improves on-site testing efficiency. In terms of core test capability, the instrument can complete the three-phase transformation ratio test of the transformer at one time, with extremely fast test speed and high measurement accuracy, effectively shortening on-site operation time and improving the reliability of test results.

Key Functional Characteristics

In terms of functional design, the ZX-SBC tester covers the full range of test requirements for power transformers and related equipment, with comprehensive and intelligent functional features.

First, the instrument has excellent power supply and endurance performance. It supports AC and DC dual use, compatible with lithium battery power supply and 100-240Vac wide-voltage AC charger power supply. A single full charge can support continuous ratio group testing of 100 transformers. It is also equipped with intelligent charging management, remaining power display, low power alarm and backlight automatic adjustment functions, which effectively realizes power saving and ensures long-term stable operation in the field.

Second, it has comprehensive and high-precision test capabilities. It adopts full three-phase sinusoidal inverter output, with automatic output voltage regulation, soft start and soft stop functions, ensuring high test speed and precision. It supports transformation ratio, group and polarity testing of three-phase transformers, single-phase transformers, potential transformers (PT), and Z-type transformers, and also has CT transformation ratio polarity test function. In single-phase test mode, it can complete angle difference testing, and supports tap gear testing up to 197 gears, with a wide test range up to 10000, covering almost all conventional transformer test scenarios in the power industry.

In addition, the instrument is designed with multiple intelligent safety functions and perfect data management capabilities. It has a unique blind test function, which can complete transformation ratio and group testing even when the high and low voltage connection modes of the transformer are unknown, greatly improving the flexibility of on-site testing. It is equipped with high and low voltage reverse connection protection and output short circuit protection functions, which effectively avoid equipment damage caused by misoperation. For data management, the instrument supports power-off proof clock and date display, with dual storage modes of local storage and USB disk storage. The local storage can save up to 500 sets of test data, which can be transferred to a USB disk. The data stored in the USB disk is in Word format, which can be directly edited and printed on a computer, facilitating the sorting and archiving of test data. Meanwhile, with a weight of only 1.34 kg and a compact size of 246mm (L) × 156mm (W) × 62mm (H), the instrument is easy to carry and operate in various narrow field spaces.

Core Technical Specifications

The core technical indicators of the ZX-SBC hand-held transformer ratio tester strictly comply with the relevant standards of the power industry, and the specific parameters are as follows:

Test range: 0.9-10000

Measurement accuracy: ± (reading × 0.1% + 2 words) (test value ≤500); ± (reading × 0.2% + 2 words) (500 < test value ≤3000); ± (reading × 0.3% + 2 words) (test value >3000)

Resolution: 0.0001 for 0.9-9.9999, 0.001 for 10-99.999, 0.01 for 100-999.99, 0.1 for 1000-9999.9, 1 for 10000 and above

Working power supply: internal lithium battery or external AC charger, with charger input range of 100-240Vac, 50/60Hz

Charging time: about 5 hours

Instrument weight: 1.34 kg

Instrument dimension: 246mm (L) × 156mm (W) × 62mm (H)

Operating temperature: -10 ℃ ~ 50 ℃

Relative humidity: < 90%, no condensation

Industry Application Value and Prospects

With the continuous expansion of power grid scale and the continuous improvement of operation and maintenance requirements in the current power industry, the demand for efficient, portable and high-precision on-site testing equipment is increasing. The ZX-SBC hand-held transformer ratio tester is fully suitable for application scenarios such as power grid operation and maintenance departments, power generation enterprises, transformer manufacturing factories, and power engineering construction and commissioning units.

For on-site operation and maintenance scenarios, the portable design of the instrument solves the problem that traditional large-scale testing equipment is difficult to carry and use in remote substations and complex field environments. Its one-time three-phase test function and blind test function greatly improve on-site testing efficiency, shorten power outage operation time, and help improve the reliability and stability of power grid operation. For transformer manufacturing and factory inspection, the high-precision test capability of the instrument can meet the strict factory inspection requirements of transformers, and the perfect data storage function facilitates the traceability and archiving of product test data. In addition, the complete protection functions of the instrument can effectively reduce the risk of misoperation in the test process, ensure the safety of operators and equipment, and have high economic and practical value.

Conclusion

The ZX-SBC hand-held transformer ratio tester, with its portable design, comprehensive test functions, high-precision measurement performance and perfect safety and data management capabilities, effectively solves the pain points of traditional transformer ratio test methods in field applications. It provides a reliable, efficient and easy-to-use technical solution for transformer ratio testing in the power industry, and is an important technical equipment to ensure the safe and stable operation of power transformers and power systems. With the continuous development of the power industry, this instrument has broad application prospects in transformer testing and operation and maintenance scenarios.

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/