Wiring mode selection of main circuit of overload protector The main current connection mode is divided into: 1, Primary core-piercing type (peripheral current transformer secondary circuit can also be used) 2, the terminal type (can also u....

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When the motor is overloaded (greater than the preset current of the protector) or the motor is disconnected (one or more phases without current), the normally closed shock 3 or 4 will be temporarily disconnected (the circuit in the figure).....

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As shown in the figure below, the overvoltage signal of the mains is drawn from the R3 and RP voltage divider circuits. After the trigger diode is turned on, the micro-trigger thyristor is turned on to make the tripper act. The overload prot....

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Its basic working principle is that a closed magnetic circuit with a certain gap is composed of two U-shaped magnets and two three-terminal integrated Hall elements. As a current detection system, a load and a thyristor current wire pass thr....

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The schematic diagram of the current-type flyback switching power supply controlled by UC3842 is shown in Figure 1. It uses a dual-loop control mode, one is a voltage outer loop that detects the output voltage, one is a current inner loop th....

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What is a motor overheat and overload protector? The function of motor protector is to protect and control the motor comprehensively. In the event of overcurrent, undercurrent, phase failure, stall, short circuit, overvoltage, undervoltage,....

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First, the basic principles of selection Today, there are no uniform standards for motor protection products on the market, and the model specifications are varied. In order to meet the different needs of users, manufacturers have derived a....

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1. The motor is easier to burn the winding than in the past. It is due to the continuous development of insulation technology. In the design of the motor, it is required to increase the output and reduce the volume, so that the heat capacity....

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Overloading means that the operating current of the powered device exceeds its own rated or allowable current. After overload, it is easy to cause the temperature of the line and the electrical equipment to rise, destroying the insulation of....

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Short-circuit protection is a fault in the circuit. For example, the resistance of the wire is almost negligible without passing through the load. Therefore, the huge current generated instantaneously provides a cut-off power supply to preve....

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