Confirm the Dryness of SF6 with a reliable dew point measurement

In the energy industry, SF6 is used to insulate switchgear, circuit breakers and other devices used for power transmission and distribution. To preserve the properties of the SF6 insulation, the water vapor content in the SF6 gas must be kept to a minimum. Moisture can also promote the formation of undesirable secondary decomposition products, which can lead to arcing and equipment failure.

The Vaisala Multiparameter Transmitter DPT145 enables easy online monitoring of SF6 gas. This provides an innovative device for online measurements of dew point, pressure and temperature. It also calculates four other values ​​such as B. Gas density and ppm. The DPT145 is ideal for assessing the condition of the SF6 insulation. Sudden and smaller leaks are immediately detected by the direct normalized pressure measurement, while the online dew point measurement warns the operator of moisture problems that affect the insulating properties of the SF6 gas and can lead to its rapid deterioration. The DPT145 can be integrated into systems for condition monitoring and thus minimizes the need for on-site inspections. In addition, it is ensured that no SF6 gas can escape into the atmosphere.

If spot checks of the SF6 dew point are required, the lightweight portable dew point meter DM70 with battery operation is the ideal device for the task. It supports the on-site operating technicians with quick response times and internal data storage. A unique sampling cell enables dew point measurements both under gas pressure and at ambient pressure. The cell meets and exceeds environmental regulations by protecting against the accidental release of SF6, requiring an extremely small sample size for SF6, and enabling the collection and recycling of SF6.