SF6 Gas Insulated Equipment

​Monitor quality of SF6 with online dew point and pressure measurement

The electric power industry uses SF6 to insulate switchgears, circuit breakers and other equipment used in electricity transmission and distribution. To ensure the integrity of SF6 gas as an insulator, the amount of water vapor in SF6 gas should be kept to a minimum. Moisture may also increase the formation of unwanted secondary decomposition products, which can lead to arcing and equipment failure.

Online monitoring of SF6 is convenient with Vaisala's Multiparameter Transmitter DPT145. The DPT145 is a unique innovation that not only monitors dewpoint online but also pressure and temperature. In addition the instrument calculates four other values, including gas density and ppm. The DPT145 provides an excellent assessment of the SF6 insulation. Both sudden and minor leaks are detected by the direct normalized pressure measurement, while online dew point measurement alerts the user to moisture issues, which can weaken the insulation properties of SF6 and cause rapid deterioration. Integrating the DPT145 into a condition based monitoring system minimizes the need for on-site visits and helps to ensure that no SF6 is released into the atmosphere.

Spot-checking is easy with Vaisala's hand-held dew point meter DM70 which is a lightweight, battery-powered instrument for measuring the dew point in SF6. It provides fast response time and internal datalogging to optimize the field technician's time. A unique sample cell allows dew point measurement at both in gas pressure and in ambient atmospheric pressure. The cell meets and even exceeds environmental regulations by ensuring protection against accidental discharge of SF6, requiring minimal amount of SF6 for sampling, and enabling collection and recycling of SF6.

Related Products

Accredited Calibration

Accredited Calibration

Many industries are required by regulatory bodies to comply with strict quality standards. Vaisala offers calibration services accredited according...

Related Stories

Storm hits the beach in the Bahamas
Success Story | Sep 26th 2017

Making the Bahamas Stormproof

With a modern weather forecasting network, covering the whole expanse of the country, The Bahamas will be able to keep its citizens and numerous...
Read more
Deicing an aircraft - Vaisala Success Story
Success Story | Sep 01st 2017

Precision to Aircraft De-icing

Snow,Freezing rain – it doesn't take much of an imagination to picture how these and other wintry weather phenomena can make a pilot's job harde...
Read more
EverPower uses Vaisala Triton for bankable hub height wind data
Success Story | Jun 29th 2017

Banking on Hub-Height Wind Data

Learn how a fast-growing North American wind energy company uses Vaisala's Triton Wind Profiler in challenging terrains and climates to: Improve...
Read more
Pursuit of the Perfect Potato Chip
Success Story | Jun 14th 2017

Pursuit of the Perfect Potato Chip

Carbon dioxide monitoring technology helps make defect-free chips. From farm to fryer, potatoes grown to make potato chips are sensitive to envi...
Read more
Vaisala’s Role as an Ambassador
Success Story | Jun 01st 2017

Weather-Ready Nation Ambassador

Destructive, damaging weather can wreak havoc across communities, especially vulnerable ones with limited resources and education about preparin...
Read more
Vaisala keeps data centers cool
Success Story | Jun 01st 2017

Keeping Data Centers Cool

Increasing demand for data processing and storage capacity has led to major companies investing in new facilities that provide web-based service...
Read more
Jan Bogo Station in Antarctica - Vaisala Case
Success Story | Jun 01st 2017

Scientific Research on Antarctica

Vaisala working together with our partners, installed an AUTOSONDE at Korean Antarctic Jang Bogo station, Terra Nova Bay, Antarctica. Korea Pola...
Read more
Uncovering Martian Secrets with Vaisala
Success Story | Jun 01st 2017

Water on Mars

NASA's Curiosity Rover Uncovers Liquid Brine Conditions on Martian Surface The first evidence of liquid water on Mars was announced in May 2015....
Read more