GDPDS-341 SF6 Electrical Insulation State Comprehensive Analyzer

GDPDS-341 SF6 Electrical Insulation State Comprehensive Analyzer

At present, the UHV voltage level of 110KV and above uses SF6 gas-insulated enclosed GIS as the main primary equipment of the substation, the evaluation of GIS internal insulation status is mainly achieved by partial discharge detection method and SF6 gas chemical analysis method at home and abroad. When partial discharge occurs in the early stage of insulation degradation inside the GIS, it will cause serious safety hazards to its safe operation. The detection methods of partial discharge mainly include three methods: ultra-high frequency partial discharge test, ultrasonic partial discharge test, and chemical detection of SF6 gas composition. At present, there are separate devices for these types of test methods on the market. For on-site GIS partial discharge live detection, two professional technicians in electrical and chemistry are required to carry multiple equipments at the same time to carry out partial discharge and SF6 gas detection, both flexibility and timeliness are too poor. In view of the current situation of partial discharge detection in GIS, HV HIPOT company introduced the international advanced technology to develop SF6 electrical insulation state comprehensive analyzer. The combination of UHF method, ultrasonic method and SF6 gas analysis in one equipment can improve the detection efficiency and judgment method of partial discharge defects in GIS equipment, and improve the accuracy of partial discharge judgment, provide reliable technical support for maintenance decision.

In addition to the SF6 gas analysis part, the SF6 electrical insulation state comprehensive analyzer also integrates partial discharge detection technology. Operators can use the partial discharge detection equipment to conduct preliminary partial discharge test and inspection on the tested electrical equipment. Once the electrical equipment is found to be suspected of partial discharge insulation failure, the SF6 gas analysis part can be used immediately to conduct SF6 gas sampling, physical and chemical analysis. The insulation condition of the tested object can be determined by querying the corresponding national standards through the physical and chemical analysis results. At the same time, SF6 gas analysis and partial discharge test can be carried out simultaneously. By synthesizing the data of physical quantity and chemical quantity, we can more accurately judge the insulation condition and fault cause of electrical equipment.

The main advantage of the SF6 electrical insulation status comprehensive analyzer is that it can comprehensively determine the insulation status of electrical equipment through the two results of partial discharge and SF6 gas physical and chemical analysis, and can determine the operating status of electrical equipment more quickly and accurately. It can also be used as a portable comprehensive testing equipment for on-site testing of SF6 gas micro-water, purity, and decomposition products.

● Partial discharge and analysis of trace moisture, purity and decomposition products of SF6 gas electrical equipment for electric power.
● SF6 gas cylinder gas quality test.
● Quality test of SF6 gas for recovery and reuse.
● High purity gas manufacturing.
● Semiconductor industry dry gas supply.
● Research and development use.
● Clean room/dry house monitoring.
● Metal heat treatment site and laboratory industrial gas humidity detection, such as air, CO2, N2, H2, O2, SF6, He, Ar and other inert gases.

Partial discharge detection part:

SF6 gas analysis part

SF6 Humidity
● Measurement method: Resistive and Capacitive measurement principle
● Measurement range: dew point -80℃--+20℃ (support ppmv)
● Accuracy: ±1℃
(when the dew point temperature is below 0 ℃, the sensor output is the frost point)
● Response time: 63% [90%]
+20→-20℃ Td 5s[45s]
-20→-60℃ Td 10s[240s]
● Resolution: 0.01℃
● Repeatability: ± 0.5 ℃
● Display unit: ℃, ppm, ℃P20(converted value at 20℃)

SF6 Purity
● Measurement method: Infrared Measurement Principle (NDIR series sensors)
● Measuring range: 0 ~ 100% SF6
● Response time: [90%] 60s
● Accuracy: ± 0.5%FS
● Repeatability: ± 0.5%
● Resolution: 0.01%
● Display unit: %

SF6 Decomposition Products
● Measurement method: Electrochemical Measurements Principle (Electrochemical series sensors)
● Measurement range: H2S: 0 ~ 100ppmv
SO2: 0 ~100ppmv
CO: 0 ~ 500ppmv
HF: 0 ~ 50ppmv
● Resolution: 0.5ppmv
● Display unit: ppmv

Gas Flow
● Dew point measurement: SF6 and other gas: 400-600ml/min
SF6 purity measurement: 300-450ml/min
SF6 Decomposition Products: 250-300ml/min
● Flow display: 0-1000mL digital flow meter
● Sample gas pressure: ≤1MPa
● Sensor protection: Stainless steel sintered filter
● Power supply: 110-220VAC±10%, 50Hz, AC/DC use, over-charge protection, continuous working is no lower than 8hours.
● Use environment temperature: -20--+60℃
● Operation environment: temperature: -35 - 70℃
   Pressure: 0 - 20bar
   Sample gas flow rate: no-effect
● Humidity: 90%RH
● Dimension: 570*418*320mm
● Weight: about 18kg.