Over the years, accidents that caused heavy losses due to fires caused by overheated switches or overheated cables and large-scale power outages have occurred from time to time. Therefore, it is an issue of long-term concern for power equipment manufacturers and users to effectively monitor the operating temperature of high-voltage equipment in real-time and reflect the operating conditions of the equipment in real time through temperature conditions, eliminate the danger in the bud, and improve the reliability of the power supply equipment. .
As far as the current high-voltage electrical equipment temperature monitoring methods are concerned, either real-time online monitoring cannot be performed or there are hidden safety problems, and the problem of temperature real-time online monitoring of the power system can not be properly solved. Therefore, there is a need to find new technologies to solve the problems of temperature real-time online monitoring.
From the perspective of various current sensing technologies, surface acoustic wave sensing technology can effectively solve the problems existing in the power system temperature monitoring technology. The surface acoustic wave passive wireless temperature sensor measures the temperature according to the change of the oscillation frequency of the surface acoustic wave device caused by the temperature change, the sensor head does not need to supply power, eliminates the safety hazard caused by the power supply problem of the sensor head, and the sensor head adopts passive The device does not have the problem of burning and stopping at a high temperature; wireless transmission is used between the sensor head and the reader to eliminate the hidden dangers of creepage in any other wired (including fiber) connection methods.
Based on this technology, Wuhan Fenghuo Fuhua Electric Co., Ltd. has developed the FH4100 series of passive wireless temperature real-time online monitoring and management system, which has the advantages of pure and passive, maintenance-free, small size, high measurement accuracy and fast response speed. It also has multi-point detection, digital transmission, strong anti-interference, two-level alarm and so on. It realizes real-time on-line monitoring of the temperature of high-voltage electrified body, fundamentally solves the problem of temperature inspection management, and realizes the inspection from time to time. The transition of on-line maintenance provides an effective management tool for preventing accidents.
User evaluation: Deputy Director Li of Transformer Department of Guangxi Qingzhou Power Supply Bureau stated that the product has a small temperature sensor, easy installation, and can be monitored at any time by connecting to a computer. In addition, the product not only reduces the workload of maintenance and power transformation departments, but also the monitoring equipment can be accurate and reliable. Its product price is 20% higher than that of wireless active products, but its overall price/performance ratio is also superior. At present, Qingzhou Power Supply Bureau has already adopted this system in six substations.
Shoes and Boots Accessories
The basic equipment for leather Shoe Care includes: leather cleaning fluid, waterproof spray, two-color leather shoe oil, large and small two-color bristle dust cleaning brush, horse hair brush, shoe horn, flannelette, etc., as well as wrinkle rubber shoe brush and sandalwood specially designed for deerskin shoes, and sheepskin gloves used to wipe the dust on shoes without shedding hair and hurting the leather.
1. Insoles: These can provide additional cushioning and support for your feet, especially if you have flat feet or high arches.
2. Shoe trees: These can help maintain the shape of your shoes and prevent creasing by keeping them stretched out when not in use.
3. Shoe horns: These can help you put on your shoes without damaging the back of the shoe or crushing the heel.
4. Waterproofing spray: This can protect your shoes from water damage and stains.
5.
Shoe Polish: This can help restore the color and shine of leather shoes and boots.
6. Shoe brushes: These can be used to remove dirt and debris from your shoes and boots before polishing.
7. Boot cuffs: These can add a stylish touch to your boots while also keeping your legs warm.
8. Boot straps: These can help keep your pants tucked into your boots and prevent them from riding up.
9. Heel grips: These can prevent your feet from slipping out of your shoes and also help reduce friction and blisters.
10. Shoe clips: These can be used to add a decorative touch to your shoes and can be easily removed or swapped out for a different look.
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