Product Introduction

The LDMD-II SF6 Gas Density Relay Calibration Device is an intelligent SF6 density relay calibration instrument. This device utilizes high-precision pressure sensors and high-speed A/D converters, combined with a 32-bit high-performance microprocessor, to perform performance calibration on various SF6 density relays. It accurately measures the pressure value at the current temperature when the signal actuates, automatically converts standard pressure at 20°C for any ambient temperature, and can immediately print and store test data for review. It also automatically identifies faults during the testing process. This product is easy to carry, simple to operate, with high testing accuracy, strong stability, and good reliability, showcasing the instrument's "intelligent" features.

SF6 switches are widely used high-voltage electrical equipment in the power system, and the reliable operation of SF6 switches has become one of the concerns for power supply and distribution departments. The SF6 gas density relay is a crucial component for monitoring the density changes of SF6 gas within the SF6 switch during operation, and its performance directly affects the operational safety of the SF6 switch. Field-operated SF6 gas density relays often become less responsive and exhibit poor contact between contacts after a period of use. Some may also show deteriorated temperature compensation performance in the density relay, leading to false operations of the SF6 density relay during sudden changes in ambient temperature. Therefore, according to DL/T596-1996 "Preventive Test Code for Electric Power Equipment," it is stipulated that each SF6 switch user should regularly calibrate the SF6 gas density relay. From the perspective of actual operation, it is also very necessary to regularly calibrate SF6 density relays and pressure gauges in the field.

Product Aliases: SF6 Density Relay Calibrator, Automatic Density Relay Tester, SF6 Gas Density Relay Calibrator, SF6 Density Relay Tester, Relay Calibrator, SF6 Gas Density Relay Calibrator

Product Features

This product employs a 32-bit microprocessor and a high-speed signal processing chip from TI for detection and control, offering a high level of integration. It features a mechatronic design with high precision, good repeatability, and reliability.

2. Equipped with a large-screen Chinese LCD screen and a rotating mouse (one-key swift navigation) human-machine interface, the operation is simple and the interface is aesthetically pleasing, with all parameters and statuses clearly visible at a glance.

3. Automatically completes pressure measurement and 20℃ value conversion, thereby completing dynamic automatic compensation between pressure and temperature. It also displays pressure under the measured environmental temperature, pressure under the environmental temperature at 20℃, and the environmental temperature. It completely resolves the difficulty of on-site calibration for SF6 gas density relays.

All testing processes are automatically completed by the instruments, without human intervention, thus avoiding the tedious manual airway adjustment operations.

5. Print test results in a Chinese character report format and conduct intelligent analysis of the experimental results.

6. Stores up to 50 sets of test results and features power failure data protection, allowing for easy retrieval and printing of past test results at any time.

7. No恒温室 required during the verification process; the SF6 gas density relay and pressure gauge can be calibrated within any valid temperature range.

8. Equipped with various types of transition connectors, most models of switches with density relays can be field-calibrated without disassembly.

9. Low gas consumption during verification, no waste of SF6 gas, low testing costs, and no environmental pollution.

10. Features an online system clock modification function.

11. Features an online system for adjusting pressure, allowing for on-site corrections.

12. Core components are made with imported parts, ensuring reliable performance.

13. Capable of testing a set of alarm signals and two sets of interlock signals simultaneously.

14. This portable tool is convenient and reliable, often the preferred choice for SF6 density relay calibration.

15. Built-in high-capacity rechargeable lithium battery, the instrument can operate continuously for 8 hours, and charging time is less than 4 hours.