Therefore, the duty personnel in the power distribution room should take effective measures to avoid the occurrence of electrical accidents according to the equipment's own conditions and the size of the load. Only the safety of the electrical equipment in good operation can ensure the continuity of the safe power supply. To this end, it is recommended to focus on the following aspects:
First, increase the intensity of inspections of electrical equipment and facilities
This will promptly identify problems that have not been discovered in the spring maintenance sweep. According to the regulations of the power system operation regulations, the normal patrol period of the power distribution room on duty is patrol once per shift, and the unattended power distribution room patrols at least once a week. During the summer load peak period, the equipment and lines that are prone to heat, full load or overload operation, long-running, defective and not yet missing should be added according to the maximum load conditions that may occur in the transformer and the line. Special inspections, that is, increasing the number of inspections and inspections, shortening the inspection inspection cycle, so as to detect abnormal conditions during operation as soon as possible, and deal with them in time to avoid the occurrence of large-scale blackouts.
Second, strengthen the temperature monitoring of key parts
Such as the operating temperature of the transformer, the temperature of the low-voltage busbar connection point, the temperature of the high-current switch, the temperature of the wire and cable connector, and the temperature of various terminals. The temperature monitoring can be carried out by applying a color-changing temperature measuring piece at a temperature-controlled part, using an infrared thermometer to measure temperature, and visually observing whether there is oxidation blackening or a connection point nuisance. For oil-immersed transformers, the upper oil temperature should not exceed 85 degrees Celsius (95 degrees Celsius is the limit). For ordinary dry-type transformers, it should not exceed 130 degrees Celsius (155 degrees Celsius is the limit), and the bus temperature should not exceed 70 degrees Celsius.
Third, check and start the ventilation cooling system in time
For transformer cooling systems that have not been started for a long time due to low operating temperature, the fan control circuit and the fan itself should be checked regularly to ensure that the transformer can start immediately when the temperature reaches the fan starting value. Ordinary dry-type transformers start at a temperature of 100 degrees Celsius, the fan returns to 80 degrees Celsius; the oil-immersed transformer fan starts at 65 degrees Celsius and the fan returns to 55 degrees Celsius. In addition, for the distribution room equipped with ventilation system, the number of opening times should be increased and the running time should be extended in the summer to make the electrical equipment operate at the specified ambient temperature.
Fourth, pay special attention to the environmental humidity of the power distribution room
If the ambient humidity is too high for high-voltage electrical equipment in operation, the hazard is higher than the ambient temperature is too high, especially the fully enclosed trolley switch cabinet that is widely used now. If it is in a high-humidity environment, it will be produced in the cabinet. Water vapor is easy to cause insulation to fall, and odor is generated due to discharge. If it is found to be untimely, causing long-term discharge of the equipment, it will cause a malignant short-circuit accident in the switchgear and endanger the personal safety of the operating personnel. According to this proposal, indoor air conditioning equipment for power distribution and distribution should be dehumidified in summer, and industrial dehumidifiers should be considered when the ambient humidity is high, which can greatly reduce indoor humidity. In addition, the temperature and humidity dual display can be hung in the equipment area and recorded regularly.
Fifth, do a good job of rainproof work
For all the inlet and outlet cables in the distribution room, check the sealing condition regularly. Check the presence or absence of water in the indoor cable trench and cable interlayer after each rain, and prevent the cable from being immersed in water for insulation. The drop leads to a breakdown accident, and at the same time, the influence of high humidity on the electrical equipment can be avoided. For the outdoor cable well, the rainfall should be drained in time.
Sixth, check lightning protection facilities
Every time after the thunderstorm, the lightning rod and arrester should be inspected in time, such as whether the discharge recorder is moving, whether there is crack damage in the porcelain part, whether there is rust and arc burn on the ground lead, and the grounding strip on the ground. The bolts of the card have no rust and looseness.
Benefits of Privacy Screen Protectors
As a personal item, a mobile phone will always contain all kinds of private information and secrets. Therefore, when many people use their mobile phones in public places, they are worried that their screen content will be seen by the people next to them. Especially when you use your mobile phone to enter various passwords, it is very dangerous if you are targeted by malicious people.
In order to prevent private information and confidential documents from being peeped, Privacy Screen Protector came into being. As the name suggests, it is a Mobile Phone Screen Protector, which can prevent others from prying on the screen and protect personal privacy. When you install a Privacy Screen Protector on your phone, people around you won't be able to see what's on your screen.
The Anti-Spy Screen Protector uses patented ultra-fine louver optical technology, so that the information on the screen is displayed on the front for the user to read. The viewable area is 60 degrees. Anyone can only see the dark picture on both sides. And the anti-blue light effect of the Privacy Screen Protective Film, the blue light blocking rate is about 10%-30%, and the mobile phone with the Privacy Film will automatically darken to reduce some glare. Therefore, normal use will not hurt the eyes, but will play a protective role. Anti-peeping Screen Protector effectively protect business secrets and personal privacy. Whether it is work, study, communication or entertainment, it makes the use of computers and mobile phones more free. Help the company's senior business personnel, lawyers, consultants, financial personnel, etc. to avoid screen information leakage when using mobile phones.
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