Product introduction

The SF6 density relay calibrator is indispensable for ensuring the safety of high-voltage SF6 equipment. By accurately simulating gas density states, it verifies relay functionality (alarm/lockout) with high efficiency. Its intelligence, portability, and precision make it vital for modern power system maintenance, preventing failures and enhancing grid reliability.

HTY3311-

Product Parameters

Measurement accuracy	0.2 F●S
Pressure displayresolution	0.001MPa
Pressure measuring range	0～0.99MPa
Temperature measurement Range	-20℃～80℃
Temperature measurement Error	±0.5℃
SF6 gas emissions	During the entire verification process, SF6 gas emissions are extremely low
Display	Industrial grade 7-inch full-color high-definition LCD screen, displaying both measured pressure values and equivalent pressure values at 20 ℃
Operating mode	Touch screen
Printing method	Array printing
Data Storage	Up to 1000 measurement data can be stored
Working power supply	24V lithium battery power supply
Overall Power Consumption	≤20W
Host size/weight	380×290×250(mm3)/4.9kg
Attachment box size/weight	390×340×200(mm3)/7.8kg

Significant features

1. High precision and reliability: Using high-precision pressure sensors and temperature sensors, it can accurately measure and automatically compensate for temperature, convert the equivalent pressure at a standard temperature of 20 ℃, and verify the reliability of the results.
2. Automation and Intelligence: Built in microprocessor, automatically controls pressure rise and fall, accurately captures contact movements, records data, and completes verification with one click, greatly improving work efficiency.
3. Portable design: The device has high integration, small size, light weight, and is equipped with long-lasting batteries, making it very suitable for mobile work needs in substations.
4. Comprehensive functions: It usually has functions such as pressure verification, temperature measurement, data storage, and report generation. Some advanced models support wireless communication to achieve remote data management.
5. Safe and efficient: By verifying the normal operation of the density relay, it can timely and accurately reflect the SF6 gas leakage situation, which is a key tool for preventing equipment failures and ensuring the safe and efficient operation and maintenance of the power grid.

Product Functions

High-Precision Pressure and Temperature Measurement: It uses high-precision pressure sensors and high-speed A/D converters with a 32-bit microprocessor to accurately measure pressure (range 0–0.99MPa, resolution 0.001MPa, accuracy 0.2% FS) and temperature (range -20°C to +80°C, error ±0.5°C).

Automatic 20°C Equivalent Pressure Conversion: The SF6 density relay tester manufacturer automatically converts the measured pressure at any ambient temperature to the equivalent pressure at 20°C using dynamic compensation algorithms, eliminating the need for a constant temperature chamber.

Multi-Contact Measurement: It can measure up to 3 sets of contacts (alarm, lockout, overpressure) simultaneously, regardless of whether the initial state is normally open or normally closed. It accurately records the up and down values for each contact.

Automatic Fault Identification: The SF6 density relay tester factory automatically identifies faults during testing and determines the contact status of the density relay, providing clear pass/fail results.

Data Management: It can store up to 1,000 measurement data sets, with power-down data saving. Test results can be printed immediately, and historical data can be queried and printed. It supports USB flash drive storage for data transfer to a PC.

User-Friendly Interface: It features a 7-inch industrial-grade full-color HD touch screen that simultaneously displays current pressure, ambient temperature, and 20°C equivalent pressure. The interface supports switching between Chinese and English.

Product Advantages

High Accuracy and Reliability: Imported core components ensure high integration, precision, repeatability, and reliability. The use of high-speed sampling A/D allows measurement of density relays with very small operating values.

No Constant Temperature Chamber Required: The dynamic compensation algorithm allows calibration at any effective temperature range, completely solving the problem of difficult on-site calibration and making the process faster and more practical.

Versatile and Compatible: It can measure both relative and absolute pressure density relays, and adapts to fully automatic calibration of all new and old density relays. The complete set of transition joints allows most switch models to be verified on-site without disassembly.

Low Gas Consumption: The verification process minimizes SF6 gas emissions, reducing testing costs and environmental impact.

Portable and Convenient: Powered by a large-capacity lithium battery (24V), it requires no AC power, solving the problem of outdoor electricity access. The SF6 density relay tester supplier is compact and lightweight (host 4.9kg), making it easy to carry.

Powerful PC Software: The accompanying PC software enables data display, Word format saving, printing, and generation of complete test reports for centralized data management.

Main applications

1. Regular verification: Conduct periodic verification of SF6 equipment density relays in operation according to regulations to ensure the accuracy of their alarm and locking contact action values.
2. Pre commissioning verification of new equipment: Conduct acceptance verification of the density relay of newly commissioned SF6 electrical equipment at the installation site.
3. Fault diagnosis: When the monitoring system sends out density abnormal signals or equipment abnormalities, the density relay is verified to determine whether the equipment is leaking air or the relay is giving a false alarm.

FAQs

1. What is the purpose of an SF6 density relay tester?
The purpose is to verify the performance of SF6 gas density relays, which monitor the gas density in SF6 switchgear. Regular calibration ensures these relays operate correctly, preventing misoperation due to temperature changes, contact issues, or aging, thereby ensuring the safety and reliability of SF6 switch operation.

2. Why is 20°C equivalent pressure used?
The pressure of enclosed gas varies with temperature. To have a unified standard for comparison, the relative pressure value at 20°C is used as the standard. The SF6 density relay tester supplier automatically converts the measured pressure at any ambient temperature to this 20°C equivalent value.

3. What is the advantage of not needing a constant temperature chamber?
Traditional calibration methods often require a constant temperature chamber to stabilize the temperature, which is impractical for on-site testing. The SF6 density relay tester manufacturer uses dynamic compensation algorithms to automatically convert pressure and temperature readings, allowing accurate calibration at any effective temperature range, which greatly simplifies on-site testing.

4. How many contacts can be measured simultaneously?
It can measure up to 3 sets of contacts (e.g., alarm, lockout, overpressure) simultaneously. The initial state of each contact can be normally open or normally closed, and the instrument records both the up and down values for each.

Our UHV‑615 SF6 Density Relay Tester is widely applied in power utilities for SF6 circuit breaker and GIS density relay calibration. Compact, lightweight and battery‑powered, it simplifies field testing work. Contact us to get competitive factory price and after‑sales support.