Analysis of Insulation Oil Components in Power System Transformers by Gas Chromatography

This instrument adopts a new chromatography instrument with an LCD Chinese large screen display and a fully microcomputer control system. This instrument has functions such as power failure protection, over temperature protection, gas cut-off protection, and power on self-test fault diagnosis prompt.

》The indicators in GB/T7252-2001 "Guidelines for Analysis and Determination of Dissolved Gases in Transformer Oil" and DL/T 722-2000 "Guidelines for Analysis and Determination of Dissolved Gases in Transformer Oil" require higher sensitivity and accuracy. Adopting a dual column parallel and three detector (FIDI, TCD, methane conversion furnace FIDII) process, the complete analysis of dissolved gas components (including hydrogen, oxygen, methane, ethylene, ethane, acetylene, carbon monoxide, and carbon dioxide) in insulating oil can be achieved with one injection. Widely used in power supply bureaus, power plants, oil flushing electrical appliances (including transformers, reactors, current transformers, voltage transformers, charging bushings, gas relays) and other power generation and supply enterprises, to determine whether there are latent overheating, discharge and other faults in the operating oil charging electrical appliances, in order to ensure the safe and effective operation of the power grid as an effective means,

It is also a necessary means for oil charging appliance manufacturers to conduct factory inspections on their equipment.

Main technical indicators:

A 320 × 240 graphic large screen is used to display both Chinese and English, with simple and intuitive parameter settings;

● Comprehensive self diagnostic function, which enables users to conveniently check the location and type of faults;

A reliable anti-interference system ensures that power fluctuations or momentary power outages will not affect the normal operation of the instrument;

Complete temperature overheating protection and platinum resistance open circuit and short circuit alarm functions to ensure that the temperature does not lose control;

● Carrier gas pressure monitoring system to achieve the function of protecting chromatographic columns, TCD, and ECD;

Adopting advanced FLASH memory system, data protection is no longer trapped by battery failure;

The highly stable and sensitive microcurrent amplification technology significantly improves the detection limit of FID;

The new thermal conductivity detector has higher sensitivity;

The instrument can be equipped with a built-in AD conversion circuit for direct digital output of chromatographic signals;

The instrument can be equipped with XS-H2000 workstation to complete all control and analysis tasks on a PC;

The instrument pneumatic system can be equipped with electronic flow display;

New pneumatic control valves ensure the repeatability of analysis parameters;

Capillary systems have split and split/non split injection modes;

● Rear door opening technology enables near room temperature operation and 9-stage programmed heating;

The instrument can be equipped with manual/automatic FID and FPD ignition devices

Main technical indicators:

1. Hydrogen flame ionization detector (FID):

Cylindrical collection electrode structure design, quartz nozzle, responsive*

Detection limit: ≤ 8×10^-12G/s (n-hexadecane/isooctane)

Baseline noise: ≤ 2×10^-13A

Baseline drift: ≤ 2×10^-12A/30min

Linear: ≥ ten⁶

Automatic ignition

Stable time: Ten minutes

2Thermal conductivity detector (TCD):

Adopting a semi diffusive structure

The power supply adopts constant current control mode

Sensitivity: ≥ 4000mV · ml/mg (n-hexadecane/isooctane).

Baseline noise: ≤ 20 μ V.

Baseline drift: ≤ 100 μ V/30min.

Linear: ≥ ten⁴

3Large screen LCD display:

Clearly display the set values, measured values, and protection values of each temperature channel

Real time display of instrument status

Touch sensitive keyboard, menu based operation

Can be ignited through the keyboard and connected to the bridge current

4.Quantitative repeatability RSD ≤3%

5.Qualitative repeatability RSD≤1%

6.Zui small detection concentration:

Analysis of Insulation Oil Components in Power System Transformers by Gas ChromatographyInstrument configuration list: