Air Monitoring 47 Scottish Power installs dissolved gas analysis monitor at a number of key sites throughout the UK
Vaisala has supplied leading British energy provider Scottish Power with a number of its Optimus OPT100 Dissolved Gas Analysis (DGA) Monitors. The DGA monitors are installed by Elimpus Ltd to provide real-time updates on the transformer condition at key sites. At a site in Scotland’s central belt, the OPT100 will give continuous updates on a 1000MVA auto-transformer, helping to protect it against the effects of solar flares: periods when intense high-energy radiation is emitted from the sun’s surface, causing radio and magnetic disturbances on Earth.
When coupled with local geology, solar flares have the potential to affect power transformers’ magnetic circuit, leading to inefficient power transmission and significant damage to the transformers. The OPT100 will monitor for the impact of these currents on the asset, allowing Scottish Power to identify changes in transformer health as a consequence of solar flare activity and carry out proactive maintenance if required.
Traditional sampling methodologies have relied on manually-collected samples of the transformer oil, which are analysed in laboratories. By contrast, online DGA allows for greater proactivity in transformer maintenance and reduces the potential for inconsistencies in data analysis. The OPT100 is Vaisala’s most advanced transformer monitoring solution, measuring moisture and seven different fault gases in transformer oil.
“Scottish Power has a number of strategic transformers on the transmission network that require advanced condition monitoring, and we have been increasingly wary of the effects of solar flares and geomagnetically induced currents to disrupt their efficient performance. The Vaisala unit was installed as it met our current specification of online DGA devices with the addition of being maintenance free,” said Keith Black, System Performance Senior Engineer at Scottish Power.
“The OPT100 gives us the ability to track any disturbance that may occur and extend the lifetime of our transformer, as well as reducing the possibility of any unplanned outages,” he added. With online transformer monitoring set to become increasingly important, Scottish Power are installing more OPT100 units across their fleet of power transformers in the future.
Vaisala has long been at the forefront of innovation in online DGA analysis, and has contributed to the incorporation of non-dispersive infrared (NDIR) technology. This ensures optimal condition monitoring performance regardless of operational conditions and enable operators to assess a wide range of gasses. In addition, with no consumables, the OPT100 requires no regular maintenance of its own.
“Advances in transformer monitoring including the incorporation of NDIR and online DGA techniques will be crucial not only to preventing catastrophic transformer failures, but also reducing O&M expenditure for operators over the lifetime of their assets,” said Product Manager Teemu Hanninen at Vaisala. For More Info, email:
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Laminar flow sensor with digital output offers ideal solution to accurate measurement of air with extremely low velocity
The EE660 from E+E Elektronik measures accurately very low air velocity. It is ideal for laminar flow monitoring and clean room applications. The transmitter is now also available with an RS485 interface.
The EE660 is suitable for accurate measurement of very low air velocity down to 0.15 m/s (30 ft/min). It features an E+E hot film sensing element, which offers excellent long- term stability and short response time. Furthermore, the sensing element is highly resistant to contamination and has a low angular dependency. Additionally to current and voltage outputs, the device now features an RS485 interface with Modbus RTU or BACnet MS/TP protocol, which allows for easy integration into a bus system. The EE660 is available for duct mount or with remote probe. The enclosure with external mounting holes facilitates installation with closed cover. The measured data is also available on the optional display. Backlight and 180° rotatability allow for comfortable reading independent of the mounting conditions.
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The EE660 is user configurable with jumpers on the electronics board or via software. The adjustment and the display setup can be performed with an optional configuration adapter and the free EE-PCS Product Configuration Software. For More Info, email:
47722pr@reply-direct.com Humidity and temperature module for appliances and HVAC applications
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The solution for humidity and temperature sensing remotely from the main control board is now available worldwide through Sensirion’s distribution network. Sensirion, the expert in environmental sensing, now offers a new humidity and temperature module, the SCC30-DB. Some applications require a humidity and temperature sensor to be located in a specific part of the device – often at a different location to the main control board. With the SCC30, customers can place a humidity and temperature sensor anywhere in a device and connect it to the main board with a cable. Based on Sensirion’s experience and expertise in environmental sensing, the SCC30 is optimised for easy design-in and sensing performance. The SCC30 offers superior sensor performance with capacitive sensor elements and a very attractive price/performance ratio due to Sensirion’s latest generation of highly integrated humidity and temperature sensors SHT3x.
The module provides high reliability and excellent long- term stability, a broad supply voltage range of 2.4 V to
5.5 V and delivers fully calibrated and processed measurement values through an I2C interface. The compact design with connector and easy-to-use digital interface makes the SCC30-DB a cost- effective and versatile plug & play solution for a wide range of applications.
Typical applications are air treatment devices such as air conditioners, air purifiers, humidifiers and dehumidifiers. The SCC30-DB is also optimally suited for HVAC and other appliance products.
New high pressure turbine meter for liquid refrigerants
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Titan Enterprises, a leading manufacturer of specialist flowmeter, reports on the development of a high-pressure turbine meter for measuring the flow of liquid refrigerants.
In response to their OEM customer’s requirements, Titan Enterprises designed a flowmeter able to deliver reliable, high performance across 6 flow ranges from 0.05 to 15 litres per minute. To ensure the highest degree of inertness to the refrigerant fluids the flowmeter polymer components were moulded in an FDA approved grade of Polyvinylidene difluoride (PDVF) and mounted in a 316 stainless steel body.
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Incorporating steel reinforced polymer components, to give a pressure rating of 40 Bar, the low inertia turbines of the flowmeter have proven ideal for measuring the low viscosities (0.3 to 0.4 centipoises) encountered with volatile refrigerant fluids measured in the liquid form. With careful sensor selection the pressure drop through the flowmeter is low enough to prevent gas break-out and ensure reliable flow measurement from -25°C to +125°C.
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www.envirotech-online.com IET November / December 2018
47682pr@reply-direct.com
USH-9 NEXT GENERATION
ULTRA-SONIC SNOW DEPTH
World-class: The new maintenance free USH-9 snow depth sensor sets new standards in ultra-sonic snow depth measuremnets.
Measurement of snow depth or height
MAINTENANCE FREE Robust sealed ceramic membrane Recognition of snow fall and rain Internal temperature compensati on Highly economic
Precise, reliable in all conditions without heating
Measurement of precipitation intensity
Perfect for remote locations
www.sommer.at
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