Single-phase motor is used to control the reversal of single-phase motor (046000). No. 133, 42/F, Huifeng Street, Changzhi City, Shanxi Province, Zhang Shuzhen, currently selling woodworking machinery, mostly uses single-phase motor drive, and the single phase is used with it. The smoothing switch has a small contact capacity, a high damage rate, and is difficult to operate. This deficiency can be solved by using a three-phase reverse switch control with a large contact capacity and easy operation.
X means that the contact is on, the contact is off, the three-phase reverse switch is controlled, the single-phase motor is reversing the wiring diagram, and the reverse-switching position is shown. The single-phase motor is to be reversible, and the method is to change the working or starting winding. Any group of winding current directions. Wiring as. The specific wiring method is as follows: (1) select one of KO-3 type three-phase reverse switch; (2) short contact point with wire, 1, 5; (3) single-phase AC 220V power supply, phase line L contact point K4 , the zero line N contact point K6; (4) the contact K5, K6 lead wires are respectively connected to the D2 and D working winding terminals in the motor junction box; (5) the contacts K8, K9 lead wires are respectively connected to the motor junction box D ), D5 start winding terminal; 6) Start capacitor to connect the terminal block in the motor junction box Di, D%.2002-03 -04 Received computer mouse has 7 two fear that the mouse plays an indispensable role in computer operation, It looks like the steering wheel of a car. If you understand the 'two fears' of the mouse, we will better care for and use the mouse.
The first is afraid of dirty. After a period of use, dust is formed on the drive shaft that is in contact with the mouse ball, thus reducing the sensitivity of the mouse and the drive shaft. When the mouse is moved, the cursor on the screen is unresponsive and it is difficult to determine its position.
The second is afraid of light. Since the mouse rotates the grid wheel on the two transmission shafts through the mouse ball, the light of the illuminating diode is divided and received, thereby locating the movement of the mouse, so when there is strong light irradiation (such as sunlight), the photosensitive light is affected. The function of the component causes the mouse to be slow to respond and does not listen to your command.
Therefore, it is necessary to remove the dirt in the mouse regularly, and to avoid glare as much as possible. This will help us to better use the mouse.
Why there is electricity on the zero line (844700) Xinjiang Shache Power Supply Company Liu Genhong On October 18, 2001, a ginning factory of our county cotton and linen company was shut down to repair its 0.4kV distribution line in the production workshop. Before the maintenance of the line, the electrician of the factory disconnected the main switch of the low-voltage side of the transformer, and then measured the lower terminal of the main switch of the low-voltage switchboard with a digital test pen. It was found that there was no voltage on the three phase lines. However, when testing the zero line, it was found that the test pencil showed a voltage of more than 100V. Where does the electricity on the zero line of the distribution line of the plant come from? The analysis believes that although the low-voltage side outlet switch and the vacuum circuit breaker of the transformer have been disconnected, the switch only disconnects the phase line, and the middle The line is still connected to the transformer. Since the switch on the high voltage side of the transformer is not disconnected, there is still a certain relationship between the neutral line and the high voltage. This connection is achieved by the actual capacitance between the high and low voltage windings of the transformer. If the three-phase voltage of the 10kV line is unbalanced, there is a voltage between the three-phase line and the ground. This voltage may reach the phase voltage and is transmitted to the zero-to-ground resistance through the capacitance between the high and low voltage windings of the transformer! on. It can be seen that if the neutral line is poorly grounded or there is no grounding, a high ground voltage may be generated on the zero line. This is the cause of the failure. This fault also tells people that when disconnecting the transformer power supply, it is best to disconnect both the high and low side switches. 2002-03-12 Received the rustless screw three methods (456574) Haohede oil immersion method in the tea shop township of Linzhou City, Henan Province. The rusted screws are all saturated with oil (the best oil, gasoline, diesel or other waste) Oil is also available). After a few minutes, use a wrench to clamp the nut and the screw, and the rusted screw or nut will be slowly unscrewed.
The fire method puts the rusted screw in the fire to burn red, and uses the basic principle of the metal material to heat up and shrink, and the metal is burnt red and soft, and the screw can be easily unscrewed.
If the rusted screw is on the pole or on other large-sized equipment, if there is no oil or fire at the moment, you can take a hammer and a chisel and use a chisel to pick up the screw cap. 1/3: 1/2 gap, the screw cap will loosen, and then use a wrench to screw, the rusted screw cap will gradually unscrew. 2002-03-14 Received electricity Shandong Province Luanping County Electric Power Company held 7 quality project H speech contest to improve staff management ability and management level, 27 players from the grassroots level participated in the competition. Li Hua)
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