Density Relay is composed of the density detection system including pressure sensing elements, a drive mechanism, temperature compensation elements, an indication unit and an electric contact unit.
It uses the pressure measuring principle with temperature compensation to measure the pressure of the F6 gas under certain density in the sealed vessel for field test and control through a density detection system thus achieves the goal of Gas Density monitoring.
Main Technical Data
| Working environment: | -30℃~60℃, relative humidity:≤95% PH |
| lngress Protection | IP 65 |
| Vibration resistance in working environment | class 1 (general); class 2 (shockproof) |
| lmpact class | 30g(general); 50g (shockproof) |
| Leakage ratio | ≤1x10-9 Pa.m3/s (helium leak detection) |
| Contact type | magnetic aid electric contact switch 80%silver, 20%nickel, 10µm gold plated |
| Electric parameters of the contact | AC: 30VA 380V 1.0A DC: 30W 220V 1.0A |
| lnsulation performance insulating resistance | 100MΩ (500VDC) |
| Power-frequency withstand voltage | 2000V 45/60HZ.1 min |
1. Electric contact switch design realizes accurate and reliable SF6 gas monitoring functions.
2. With temperature compensation, the compensation performance is stable and the detection precision is high.
3. On-site display values and output contact signals are not affected by external conditions including the altitude and ambient temperature change.
4. Core elements are made of imported materials with high precision.
5. Good shockproof performance.
6. There are three contact groups at most, which can realize several options including overpressure alarm, double alarm or double lock and make the monitoring safer and more reliable.
7.Gas fill, micro-water test and calibration can be implemented without removal of the SF6 gas density relay, making it easy for on-site staff to conduct micro-water test and gas supplementand avoiding the seal face and seal ring damage arising from removal. 8.304 stainless steel is adopted for the sealed case, which prevents both moisture and corrosion.
The company has built up a rigorous and comprehensive production quality supervision and management system. It passed 1SO9001 system certification in 2008 and EU ECE certification in 2015. Besides, it has also obtained a dozen of patents.Over recent years, all employees of the company, from top to bottom, have been working hard together. As a result, the company has seen considerable development along with greater overall strength and development potential. In future, we will always stick to the guiding philosophy of "Only development is the cardinal principle" , maintain the mature manufacture process and good-faith operation guided by advanced development concepts, and make more innovations and developments in teamwork spirit. We will cut through wind and waves of the fierce market competition on the path towards building up the company into the No.1 Pressure Gauge brand in China as well as a global leading expert of total solutions for gas monitoring in the power industry.
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