1. Work on all and part of the charged disk. The maintenance equipment should be separated from the running equipment by obvious signs. This operation is very close to the operation of the meter box. 2. The secondary winding with current transformer and voltage transformer should have permanent and reliable protection grounding. 3. It is strictly forbidden to disconnect the current loop when working on the secondary circuit of the running current transformer. 4. When working on the secondary circuit of the voltage transformer in operation, strictly prevent the short circuit or the staff who check the power failure protection and the secondary circuit, and do not allow any switching operation without the permission of the on-duty personnel. First, in the operation of the high-voltage switchgear in the power transmission operation procedures should pay attention to the following nine points: 1. Wear protective equipment and use high-voltage test equipment to confirm that the city's high-voltage power is normal. 2. Open the grounding knife lock. Remove the "No Closing" warning sign. 3. Operate counterclockwise to open the grounding knife. 4. Check that the grounding indication is in the disconnected position. 5. Lock the grounding knife lock. 6. Open the switch lock. 7. Turn the switch on by counterclockwise operation, then store the operation clockwise. 8. Check that the three indicators are on. 9. Lock the switch lock. Second, the following seven points should be noted when the high-voltage switchgear is powered off: 1. Disconnect the main load switch of the incoming line cabinet of the low voltage distribution cabinet. 2. Check that the three indicators are on. 3. Press the power switch by hand and hear the sound of the switch. 4. Check the L1, L2, and L3 with the high voltage tester, and the indicator light should be white without flicker. 5. Open the grounding knife lock. 6. Operate clockwise and close the grounding knife. 7. Check that the grounding indication is in the grounded state. Hang up the "No Prohibition" warning sign.
Semiconductor Chip Carrier can be divided into thermo-electric modules, and the power electronic substrates.
Thermo-electric modules are plate-like semiconductor cooling devices that work by using the movement of heat when a current flows through the junction of two different metals. Compact, lightweight, and Freon-free, they are used in climate control seats of automobiles, cooling chillers, optical communications, biotechnology, air conditionners, dryers and a variety of consumer electronic products.
Application of Thermo-electric module Manufacturing Technology for Heat Dissipation and Insulation Substrate
Generally, organic and metal substrates are used in the circuit boards of low-power home appliances and computers.
In particular, silicon nitride substrates are attracting attention for use in power modules of inverters and converters because of the increase in sales of HEVs and EVs. Chip Carrier Package,Ceramic Chip Carrier,Plastic Leaded Chip Carrier,Chip Carrier Socket SHAOXING HUALI ELECTRONICS CO., LTD. , https://www.cnsxhuali.com
However, alumina, aluminum nitride and silicon nitride substrates are used in heat radiation insulated substrates of power modules that handle high power.
The construction of 10KV transformer and distribution project is the construction of high-voltage power engineering. Therefore, in the construction of 10KV transformer and power distribution project, it is possible to cause tragedy if it is inadvertent. In order to avoid the occurrence of tragedy, workers must pay attention to safety in the construction of 10KV power distribution and distribution projects. Please follow the following safety precautions, that is, safety precautions for high voltage switchgear.
May 01, 2023