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Selection Solution for Gas Relay Calibrators
Release time:
2026-02-27
Keywords: relay calibration bench, pressure relief valve calibration device, gas relay tester, gas relay detector, gas relay and pressure relief valve calibration instrument, gas relay calibration bench
Definition: The gas relay tester is used in power systems to verify the operating flow rate of the heavy-gas protection, the operating volume of the light-gas protection, and the sealing test of the gas relay for transformers, as well as to test the opening and closing pressures of pressure-relief valves. It simulates internal transformer faults to measure the instantaneous pulse flow rate using the differential-pressure method, with microcomputer-based measurement and control, digital display, and automatic printing.
The transformer gas relay calibrator is a newly designed device for the calibration and testing of gas relays. It simulates the operating mechanism of gas relays during internal transformer faults, employing next-generation embedded control and high-precision sensor measurement technology to accurately calibrate the flow velocity threshold for heavy-gas protection operation and the gas volume threshold for light-gas protection operation. The instrument features one-button operation, rapid testing, high accuracy, and an elegant user interface. 
Functional Features:
1. This calibrator features a precisely engineered pipeline design, leverages high-precision digital sensor technology, and incorporates optimized algorithms running on a high-speed ARM chip platform, thereby significantly enhancing both measurement accuracy and speed. Its newly designed oil-return principle and specially engineered flange adapter enable time- and labor-saving, stable calibration of gas relays across a wide range of common market specifications (Φ25, Φ50, Φ80).
2. This device overcomes the shortcomings of similar equipment, which can only measure a single specification of gas relay, requires the operator to repeatedly invert the device during measurement, suffers from low measurement accuracy and poor repeatability, and involves cumbersome operating procedures. Equipped with a specially designed flange adapter and incorporating an imported high-precision pressure control system and a fully intelligent measurement system, this device enables operators to complete all required tests on gas relays quickly and easily with a single button press. Test results can be printed via the built-in miniature printer or saved to a USB flash drive. The flow rate measurement accuracy reaches 0.01 m/s, and the volume measurement resolution is 5 ml.
3. The equipment exhibits stable performance. Oil, electricity, and gas are completely isolated from one another; signal lines, power cables, and pneumatic tubing are entirely segregated; each module is arranged in a separate compartment with comprehensive shielding, thereby fully ensuring the equipment’s adaptability to and reliability in field testing environments.
4. The technical performance of this tester is comparable to that of expensive large-scale stationary oil-pump calibration benches, while offering advantages such as compact size, portability, simple operation, suitability for field testing, and significant savings in equipment and laboratory investment.
Technical Specifications:
Operating Voltage: Control and Monitoring Box: AC 220 V, 50 Hz, 320 W; Air Compressor: AC 220 V, 50 Hz, 120 W (optional accessory)
Operating temperature: -10°C to +60°C
Flow velocity measurement range: Φ25: 0–2.0 m/s, Φ50: 0–2.0 m/s, Φ80: 0–2.0 m/s; minimum resolution: 0.01 m/s.
Gas volume detection range: 0–500 mL, with a minimum resolution of 5 mL;
Sealing performance test: 0.15 MPa for 20 minutes, with a minimum resolution of 1 kPa;
Test medium: Various types of transformer oil
External dimensions: Gas relay calibrator
Main body: 115 cm × 40 cm × 105 cm; weight: 35 kg
Measurement and control box: 40 cm × 30 cm × 20 cm; weight: 10 kg
Electric air compressor (purchased component)
The HKWSJ-100 Gas Relay Calibration Bench is a newly designed calibration and testing device for gas relays. This bench simulates the operating mechanism of gas relays during internal transformer faults, employing next-generation embedded control and high-precision sensor measurement technology to accurately determine the actuation flow rate and actuation gas volume of the relay. It offers fast test speeds, high accuracy, and excellent test repeatability. Equipped with a joystick and an automated pneumatic transmission mechanism, it is easy and effortless to operate, with a high degree of automation.
The HKWSJ-100 gas relay calibration bench is suitable for the verification of various domestically produced and imported gas relays, enabling tests of seal integrity as well as the measurement and calibration of the operating flow rate for heavy-gas protection and the operating gas volume for light-gas protection. Each test function operates independently without interfering with one another. The software interface is user-friendly and easy to operate, and test results can be conveniently saved, retrieved, and transmitted over a network.
Functional Features:
1. Advanced structural principle
Advanced pipeline design and theoretical optimization, high-precision 24-bit digital sensors, state-of-the-art data acquisition cards and fieldbus systems, as well as the latest ARM control technology and analytical strategies, collectively enable breakthrough high-precision measurements.
2. Various flange adapter heads
Specially designed for easy replacement and stable measurement, it enables high-precision, stable measurements of gas relays of various specifications (Φ25, Φ50, Φ80).
3. Volume Measurement
Through a cleverly designed volumetric cylinder, a specially engineered pressure sensor, and precise algorithms, real-time, high-accuracy volume measurement is achieved, with a measurement resolution of 2 milliliters.
4. Flow Velocity Measurement
Through ingenious pipeline design, in conjunction with flange adapter fittings and a specially designed flow-rate acquisition system, precise flow-rate measurements can be performed on gas relays of various specifications, with a measurement resolution as high as 0.01 m/s.
5. Sealed Measurement
By employing rational piping design and layout, compressed air from an air compressor is used to simulate the internal pressure of coal gas, thereby testing the sealing performance of relays. Combining manual shutdown with intelligent fault detection ensures reliable interruption of operations before any hazards arise, thus guaranteeing operational safety.
6. Stable equipment performance
The system employs a bus-based wiring architecture with a well-organized layout of data acquisition and control lines, ensuring excellent electromagnetic compatibility and strong anti-interference performance, thereby guaranteeing stable operation of the equipment in harsh environments.
7. Joystick and Pneumatic Actuation
The lifting platform is adjusted using a joystick and an automated pneumatic transmission mechanism, enabling convenient alignment and secure fastening. The operation is easy and requires minimal effort, facilitating precise installation of the gas relay and ensuring high-precision measurement with excellent repeatability.
8. Large-area transparent protective cover
The entire measurement environment can be viewed in full, allowing for intuitive assessment of relay performance. The robust construction ensures safe operation.
9. Large color display with a sleek, aesthetically pleasing interface.
Windows operating system, 15-inch extra-large color LCD display, industrial-grade mouse and keyboard, network communication, fully Chinese-language color graphical user interface with a real-time help system, intuitive and simple operation, capable of performing automated testing for all test items, and allowing results to be viewed, analyzed, stored, and printed.
Technical Specifications:
1. Flow velocity measurement range: Φ25: 0–4.0 m/s
Φ50: 0–3.0 m/s
Φ80: 0–2.0 m/s
Minimum resolution: 0.01 m/s; accuracy class: 0.25
2. Gas volume measurement range: 0–1000 mL, minimum resolution: 2 mL, accuracy class: 0.2
3. Sealing Performance Test: 0.1–0.5 MPa, 0–120 minutes, minimum resolution of 1 kPa, accuracy class 0.2
4. Test medium: The test medium for gas relays is various types of transformer oil.
5. Operating Voltage: Control System: AC 220 V, 50 Hz; Power System: AC 380 V, 5 kW
6. Operating temperature: -10°C to +60°C
7. External dimensions: 1650 × 750 × 1400 mm (length × width × height)
8. Net weight: 220 kg
For more product parameter details, please visit the official website of Hubei MECI Electric Power for self-service inquiry.
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