In order to meet the requirement of transformer oil analysis that power system analysts need to carry instruments to the fault site far away from the laboratory, we Wuhan Huaneng Sunshine Electric Co., Ltd. has newly designed a special portable chromatograph for transformer oil HYG-8900B. The instrument integrates all the components of computer, gas source and so on. The number of components of the whole system is compressed to 2 pieces, which makes it really convenient. Carry.

The instrument adopts classical three-detector process, and can complete the full analysis of dissolved H 2, CO, CO 2, CH4, C2H 4, C2H 6, C2H 2 and other seven gas components in insulating oil by one injection. If necessary, the content of O 2 and N 2 can also be detected.

HYG-8900B portable chromatograph for transformer oil is not only suitable for field analysis, but also for laboratory analysis. With the further improvement of overall technology and design, it has become an alternative product for laboratory chromatograph. It has been successfully applied to many industries and departments, such as power supply companies, power plants, transformer plants, large smelting enterprises, railway power supply sections and so on.

Executive standard

1. GB/T 17623-2008 Gas Chromatography for the Determination of Dissolved Gas Components in Insulating Oils

2. GB/T 7252-2001 Guidelines for Analysis and Judgment of Dissolved Gases in Transformer Oil

3. DL/T 722-2014 Guidelines for Analysis and Judgment of Dissolved Gases in Transformer Oil

4. DL/T 703-2015 Gas Chromatography for the Determination of Gas Content in Insulating Oil

1. Detection limit (unit L/L):

Component

Detection limit

Component

Detection limit

H2

Two

CH4

Zero Point Zero Five

CO

Two

C2H4

Zero Point Zero Five

CO2

Two

C2H6

Zero Point Zero Five

O2

Five

C2H2

Zero Point Zero Five

N2

Five

--

--

2. Detector specifications:

Thermal Conductivity Detector (TCD)

Hydrogen Flame Ionization Detector (FID)

Semi-diffusive structure

Cylindrical collector structure, quartz nozzle, high response

Constant Current Control Mode for Power Supply

Automatic ignition; stabilization time: 10 minutes

Sensitivity: > 10000mV. ml/mg (benzene)

Detection limit: <8 *10-12g/s (n-hexadecane/isooctane)

Baseline noise: <20 uV

Baseline noise: <2*10-13A

Baseline drift: <100 uV/30 min

Baseline drift: > 2 x 10-12A/30min

Linearity: > 104

Linearity: > 106

3. Temperature control indicators:

Temperature control part

temperature range

control accuracy

Column box

8 ~400 C at room temperature

+ 0.1 C

FID Detector

8 ~400 C at room temperature

+ 0.1 C

Thermal Conductivity Detector

8 ~400 C at room temperature

+ 0.1 C

Ni Catalyst Converter

8 ~400 C at room temperature

+ 0.1 C

4. Other parameters:

Shape size: 625 x 500 x 297 mm

Weight: <15kg

Power supply: 220V + 22V, 50Hz

Power: <600W

1. Integrative Design with High Integration

HYG-8900B portable chromatograph for transformer oil adopts a brand new integrated design. Four kinds of gas sources, such as nitrogen, hydrogen, air, standard gas, computers and chromatographic workstations, are all built in the instrument without external gas sources and computers. The outer case of the instrument adopts the original imported storm rod box, and the drop resistance height is more than 1 meter.

2. Three Detector Flow Technology for Complete Separation of All Components

HYG-8900B portable chromatograph for transformer oil is equipped with a TCD detector and two FID detectors. It overcomes the influence of a large amount of CO and CO2 on hydrocarbon gases, especially on C2H2, shortens the detection time and greatly improves the detection sensitivity.

3. Back pressure control technology is used for carrier gas, which greatly reduces the influence of injection peak on hydrogen analysis.

Hydrogen is easily disturbed by the injection peak due to its short peak time. HyG-8900B portable chromatograph for transformer oil uses back pressure valve control technology, which can effectively reduce the interference of the injection peak on the hydrogen peak, reduce the influence of human factors on the hydrogen detection, and greatly improve the accuracy of hydrogen detection.

4. The chromatographic column technology with mixed packing can greatly improve peak response and prolong the service life of chromatographic column.

HYG-8900B portable chromatograph for transformer oil uses chromatographic columns and ERIC pipes with new mixed fillers. It avoids the generation of sample adsorption to the greatest extent, and improves the response of hydrocarbon gases by about 20 times. The response value of acetylene at 50 ppm can reach about 15 mv, and the detection limit of acetylene reaches 0.05 ppm.

5. The sensitivity of hydrogen detection is greatly improved by using high sensitivity thermal conductivity detector.

Unlike the traditional thermal conductivity detector, HYG-8900B portable chromatograph for transformer oil is equipped with a high sensitivity thermal conductivity detector with rhenium-tungsten filament resistance of 130_. It has the characteristics of small cell size and fast response, and the detection limit for hydrogen can reach 2 ppm.

6. Using computer counter-control technology to realize digital operation and one-button boot-up of the instrument

The analysis parameters of the portable chromatograph for transformer oil HYG-8900B, including carrier pressure, sample pressure and temperature, are set up or displayed through the workstation. The operation is simple and the analysis conditions are grasped in real time. The operation of temperature rising and cooling of the instrument can be realized by clicking the mouse on the workstation, which completely abandons the tedious operation in the laboratory chromatogram and basically realizes one-button start-up.

7. Digital Electronic Zero-setting Technology to Enhance the Anti-interference Ability of Instruments

HyG-8900B portable chromatograph for transformer oil uses electronic zero-setting technology to adjust the detector signal, and uses high-precision digital circuit to compensate the basic current, realizes the electronic adjustment of the output signal level, reduces the parasitic parameters, so it has strong anti-interference ability.

8. The control of oscillator is realized by using computer back-control technology.

Through a connecting signal line, HYG-8900B portable chromatograph for transformer oil can provide power for small oscillator, and can operate the whole process of temperature rising, starting oscillation, stationary and beeping prompt at the end of oscillator through workstation.

9. Automatic gas break protection function to ensure the safe operation of the detector

HYG-8900B portable chromatograph for transformer oil has the function of gas-breaking protection. When the carrier gas flow is below the set threshold, the instrument will automatically turn off the thermal conductivity current, prevent the thermal conductivity detector from burning out, and improve the safety of the instrument.

10. The instrument has its own aging program. The user can select the instrument automatically without complicated settings.

In the daily use of the instrument, in order to ensure the good operation of the instrument, it is necessary to carry out irregular aging of the instrument. The aging procedure of the portable chromatograph for transformer oil special purpose HYG-8900B can make the user do not need to set complicated parameters. When selecting the aging procedure, the instrument will automatically run according to the required parameters, so as to facilitate the user's daily maintenance of the instrument.