The fusing current of the fuse should be between the rated current of the teaching equipment and the high current, so as to ensure that the enterprise equipment can be managed and operated normally. Turn off when the power approaches high current in a timely manner. Rated current refers to the current that an electrical appliance operates at rated voltage, which refers to the large current that students are allowed to pass through for a long time under the development conditions of rated voltage management work under different temperatures of the reference environment, and the heating temperature does not exceed the allowable temperature for long-term heating of the enterprise. High current refers to a limit of current that can be sustained without affecting equipment safety. It is generally only allowed to occur for a short period of time, otherwise it may cause equipment damage. The operating current of the motor can operate for a long time, usually at most about times the rated
For some industry newcomers, they may not know the definition and function of patch fuses. Patch self recovery fuses are used to protect electronic devices from damage in the event of circuit abnormalities, greatly reducing damage. A common fuse is a fusible fuse inside a light bulb, so what is a patch self recovery fuse? According to the literal meaning, it can automatically restore to a normal state. What is the function of a patch self recovery fuse? SMD self recovery fuse is a type of overcurrent electronic protection component, which is made of polymer organic polymers under high pressure, high temperature, and vulcanization reaction conditions, and is processed by a special process after adding conductive particle materials. SMD self recovery fuse is a positive temperature coefficient polymer thermistor that can replace current fuses. The temperature during normal operation of the patch self recovery fuse is relatively low, achieving balance. When in a low resistance state,
How to choose the rated voltage and current of a patch fuse: The rated voltage of a patch fuse depends on the current flowing through it, and is not related to the working voltage of the circuit. From the perspective of safe use, the rated voltage of SMD fuse is proposed, which is the highest working voltage of the circuit when the SMD fuse is in a safe working state. This means that fuses can only be placed in circuits with a working voltage less than or equal to the rated voltage of the fuse. Only in this way can the fuse operate safely and effectively. The voltage drop at both ends of the patch fuse is very small, much lower than the rated voltage of the patch fuse. Therefore, during normal operation, the rated voltage has no practical significance. The true significance of the rated voltage of patch fuses lies in their safety performance. Chip fuse, as a safety component, must be relatively safe during normal operation, protective action, and any time period after melting. The
1. The location where the patch fuse is connected to the circuit When connecting patch fuses in a circuit, it is important to be careful not to connect the fuse to the neutral or ground wire. The correct connection is to connect it to the live wire, so that when the circuit is overloaded, the fuse can be blown in a timely manner to protect circuit safety. If only connected to the neutral line or ground wire, the fuse should blow in a timely manner, but the voltage carried by the positive and negative poles through the live wire may also cause the circuit to burn out. Therefore, the priority order for fuses to be connected to the circuit is the live wire, neutral wire, and ground wire. The location where the fuse is connected to the circuit 2. Connection method of patch fuse in circuit Usually, fuses are connected in series in a circuit. If the fuses are connected in parallel in the circuit, the current cannot be disconnected in a timely manner in case of abnormal conditions in
Firstly, what is a fuse? Fuses are made of low melting point alloys, commonly used as alloys of lead and tin (75% lead and 25% tin), as well as alloys of lead, tin, and lead antimony. Generally, fuses are installed in fuse boxes (fuses) or knife switches and connected in series in the circuit. When the current in the circuit is too high, due to the thermal effect of the current, the fuse first melts and is burned out, causing the circuit to automatically cut off, thereby protecting the safety of the power supply and electrical equipment. The rated current of a fuse (the maximum allowed current) and the fusing current (the minimum current that causes the fuse to blow) are its two important parameters, and its fusing current is generally about twice the rated current. The selection of the rated current of the fuse should be correct, so that it does not blow during normal power consumption of the circuit. In case of severe overload or short circuit, it will immediately blow and automa
Fuses (patch type fuses), also known as fuses, as the name suggests, are used to protect circuit components. When the current exceeds the specified range of the electrical appliance, the fuse will heat up and blow, thereby achieving the purpose of cutting off the current and protecting the electrical appliance. Supplementary knowledge on purchasing chip type fuses: 1. The working current of the selected chip type fuse should not exceed 75% of the rated current of the fuse. 2. The impact resistance of patch fuses is much smaller, so when purchasing patch fuses, special attention should be paid to pulse, impulse current, surge current, starting current, and circuit transient values. 3. Confirm the size of the circuit overload current that the patch fuse needs to pass through and the minimum and maximum duration of the overload current. 4. Another characteristic of patch type fuses is that by installing fuses with excessive internal resistance in certain circuits, they can affect the
MB:+86 13924633629 Ms.vicky
E-mail: waimao@xcfuse.com
Factory :
XC Electronics(Shenzhen)Corp.,LTD
Add: Jinyuan Industrial zone,Heao, Henggang, Shenzhen 518115,China
Shenzhen branch: Shenzhen Xucheng Electronic Commerce co.Ltd
Add: 8-15 Jinyuan Industrial zone,Heao, Henggang, Shenzhen 518115,China
