Table of Contents

Product Introduction

Equipped with high-precision pressure sensors, the tester simulates internal transformer faults and calculates flow velocity via instantaneous burst pulse pressure measurement.
Compliance Standards: GB50150-2006, DL/T849.6-2004

Alternative Names

Gas Relay Calibrator, Gas Relay Pressure Relief Valve Tester, Buchholz Relay Detector, Buchholz Relay Test Bench, Gas Relay Tester

Product Features

Adopts a 7-inch large touch screen system with intuitive operation and friendly interface.
Compact design while guaranteeing test accuracy, convenient for on-site field testing.
Optimized testing workflow; the test duration is reduced by more than half compared with similar domestic products.
Unique structural principle: an oil-filled micro pressure cylinder simulates the transformer main tank, and an oil return cylinder with quick valve represents the conservator. It adopts the pressure difference method to measure instantaneous flow velocity through the relay under fault conditions.
Small size and light weight. It can replace fixed test benches and be transported to transformer sites for inspection. Manual oil return is required for each test to minimize overall dimensions.
Comprehensive functions. It supports flow velocity, volume and tightness tests for QJ-25, QJ-50, QJ-80, QJ-50W, QJ-80W relays. Customized schemes are available for special imported relays.
Flow velocity measuring range: 0 ~ 0.2 m/s, maximum allowable error ≤0.05 m/s, delivering twice the accuracy required by industry standards.
Supplied with dedicated flow velocity gauges for QJ-25/50/80 models, maximum resolution 0.01 m/s. The gauges can be used for periodic calibration with the tester or independently as standard reference tools.
Independent air supply unit integrated with microprocessor control system. Consists of control cabinet, sensors, solenoid valves, digital display, micro printer, miniature electric air compressor and level gauge to achieve full mechatronic integration.
Built-in automatic measuring device for accumulative gas volume; error ≤5%, twice the precision specified in industry standards. It enables effective verification of gas relay volume scale plates.
Automatically completes all test items including oil surge flow velocity, gas accumulation volume and tightness testing, with printable test records. It represents advanced domestic technology level.

Technical Parameters of HF-RT-217 Buchholz Relay Tester

Item	Specification
Applicable Relay Models	QJ-25, QJ-50, QJ-80, QJ-50W, QJ-80W; Custom support for overseas special-type Buchholz relays
Flow Velocity Measuring Range	0 ~ 0.2 m/s
Flow Velocity Maximum Error	≤0.05 m/s
Gas Volume Measurement Error	≤5%
Flow Velocity Gauge Resolution	0.01 m/s
Display Unit	7-inch touch screen
Air Supply System	Built-in independent miniature electric air compressor
Test Items	Oil surge flow velocity test, gas accumulation volume test, tightness test
Output Function	Automatic test, built-in micro printer for test record output
Measuring Principle	Instantaneous burst pulse pressure & pressure difference method
Compliance Standards	GB50150-2006, DL/T849.6-2004
Accessories	Special flow velocity measuring scales for QJ-25/50/80
Structure Feature	Compact lightweight design, suitable for laboratory and on-site field commissioning

FAQ | Buchholz Relay Tester

Q1: What types of Buchholz relays can this tester calibrate?

A1: It supports QJ-25, QJ-50, QJ-80, QJ-50W, QJ-80W series gas relays. Custom testing solutions are available for special imported Buchholz relays.

Q2: What test items can the instrument complete?

A2: It can perform oil surge flow velocity test, light gas volume test and sealing tightness test. All test data can be automatically measured and printed.

Q3: What is the measuring range and accuracy of flow velocity?

A3: Flow velocity range: 0 ~ 0.2 m/s, maximum allowable error ≤0.05 m/s, meeting and exceeding standard accuracy requirements.

Q4: Can this equipment be used for on-site transformer inspection?

A4: Yes. Adopting compact lightweight design, it can replace fixed test benches and be carried to transformer installation sites for field calibration.

Q5: What measuring principle does the tester adopt?

A5: It simulates transformer internal faults, and calculates flow velocity by instantaneous burst pulse pressure and pressure difference measurement method.

Q6: Does the tester come with supporting calibration gauges?

A6: Matching flow velocity measuring scales for QJ-25/50/80 are supplied. Resolution reaches 0.01 m/s, usable for regular calibration or independent measurement.

Q7: Does the device support automatic testing?

A7: Yes. The whole testing process runs automatically. Equipped with a built-in micro printer to output complete test records.

Q8: Which standards does the tester comply with?

A8: It complies with GB50150-2006 and DL/T849.6-2004 standards for power equipment test.

Q9: Is an air compressor built inside the machine?

A9: It has an independent built-in miniature electric air compressor, realizing integrated mechatronic control without extra air source.

Q10: Why manual oil return is required during each test?

A10: Manual oil return design effectively reduces overall equipment volume, making the instrument portable for outdoor field work.

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