Portable Six-Fluorine Sulfur Detector

Usage and Features

The SF6 Gas Density Relay Verifier is primarily used for on-site testing of SF6 gas density relay controllers and SF6 gas pressure gauges. It can also serve as a laboratory calibration device, suitable for units and departments that utilize SF6 density relay controllers in power plants and substation facilities.

This instrument is meticulously designed with a rational structure, featuring intelligent full automation for easy portability and on-site mobility. The circuitry is controlled by a microcomputer, equipped with a blue-screen LCD display, a clear Chinese menu, and is straightforward; alarm signals use both audio and visual alarms for immediate and reliable notification. The circuit interface is designed with various corresponding connection lines (changeable) for different known density relay circuit interfaces, facilitating user operation. The air path is specially configured with multiple standard test interfaces, equipped with a variety of conversion connectors, suitable for the air paths of various sulfur hexafluoride gas density controllers and pressure gauges. The air path control utilizes precise needle valves with good airtightness and easy operation; the control panel is designed aesthetically and is user-friendly. Additionally, we have added an external printer in response to customer requirements, and matched it with corresponding printing programs and data storage software.

Testing Principle

This instrument utilizes various different device interfaces to connect the test instrument's interface with different devices, allowing the test instrument's gas path to be connected to the density control gas path and pressure gauge gas path of the SF6 electrical equipment, forming a closed gas path. By comparing the values measured by the density controller, pressure gauge on the SF6 electrical equipment with the precise pressure sensor on the test instrument, it verifies the accuracy, precision, reliability, and error of the density controller and pressure gauge on the SF6 electrical equipment.

The air circuit and electrical circuit diagrams of this instrument are shown in the attached Figures 1 and 2.

Figure 1 of the air circuit diagram illustrates that the entire circuit consists of an inflation port (connected to the pressure gauge interface), an inflation cutoff valve, a backup pressure chamber, a density relay control cutoff valve, and an interface for the measured density relay.