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07 2023-04

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August 17,2023

Can self restoring fuses solve circuit faults?autozone fuse tester

　　　　Self recovery fuse is a special material made with automatic recovery function. After a circuit failure, the current increases, and the self recovery fuse will change its structure to block the current, achieving the effect of protecting the circuit. Some people think that installing a self restoring fuse in the circuit can automatically solve the problem of circuit faults. Next, the editor will answer for everyone.　　Although self restoring fuses can protect circuits from being damaged by overcurrent, they cannot completely solve the problem of circuit faults. After a circuit malfunction occurs, the fuse blocks the current, and after a period of time, it will automatically restore its own structure and reconnect the circuit. If you do not solve the problem of an increase in current caused by a circuit malfunction, the self recovery fuse will operate again and again until the fuse is damaged.　　So can self restoring fuses solve circuit faults? In fact, self recovery fuses are only su

November 07,2023

eve temperature balancing mattress protector.Principles for selecting fuses and fuses

　　　　1. Select the model of the fuse according to the circuit requirements and installation conditions. For circuits with small capacity, choose semi enclosed or unfilled enclosed; The choice for high short-circuit current is the enclosed type with fillers; Select fast fuses for semiconductor component protection.　　2. Select the rated voltage of the fuse according to the line voltage.　　3. Select the rated current of the fuse according to the load characteristics.　　4. The selection of different levels of melts requires mutual coordination, with the latter level being smaller than the previous level. The current on the main switch and each branch line is different, and the selection of fuses is also different. If a short circuit occurs in the circuit, the 15A and 25A fuses will fuse simultaneously, and the protection characteristics will lose selectivity. Therefore, only by maintaining a 2-3 level difference between the main gate and the branch can such a phenomenon not occur. If the low-

September 12,2023

Analysis of Two Reasons for Blowing of Self Recovery Fuses during Operation.fast blow fuse screwfix

　　　　Self recovery fuses are one of the preferred protective components for many electronic circuits. When a self recovery fuse is in operation, it is inevitable that the circuit will blow. For recoverable fuses that blow in daily use, we must understand the cause in order to solve the problem with the circuit board. Below, we will follow the editor to understand the two situations where self recovery fuses blow during operation:　　Scenario 1: The self recovery fuse is broken in the middle and intact on both sides, which is caused by excessive load current causing the fuse to blow or be damaged, and the melting point to decrease, but the current is not too high.　　Scenario 2: When the self recovery fuse melts, there are burn marks and black and white ash near the fastening screws. This is caused by an instantaneous short circuit of the power supply and a high short-circuit current.　　From the above two situations, it can be concluded that when a self recovery fuse blows during operation, i

July 17,2023

NEC Thermal cutoff.thermal protector for motor

　　　　NEC Thermal cutoff has the function of detecting abnormal temperature and cutting off the circuit. It can detect abnormal temperature rise of household or industrial electrical products and quickly cut off the circuit in a timely manner, achieving the function of preventing fires from igniting.　　NEC Thermal cutoff is a kind of element that provides very reliable protection under the condition of overtemperature. It has small size, large overcurrent, non reset, stable performance, convenient installation, and a certain range of humidity settings and bearing capacity for selection to meet customer application needs.　　The products are widely used in various motors, copiers, fax machines, HID ballasts, fluorescent lighting ballasts, transformers, chargers, battery packs, heating appliances, electric irons, hair dryers, electric stoves, rice cookers, electric kettles, coffee pots, ventilation fans, electric fans, sewing machines, water heaters, power converters, power plug sockets, refr

October 11,2023

test auto fuse with multimeter.The application of self recovery fuse in rechargeable battery pack

　　　　1. The application of self recovery fuse in rechargeable battery pack　　1) Problem and Analysis: NICD, NiMH, and Li-ION are commonly used in special protection circuits for mobile phones and computers. The reasons for these battery pack failures are usually: unexpected short circuit between the positive and negative terminals; The charger cannot stop charging a fully charged battery; The polarity of the wrong charger or battery is reversed. Installing the PTC patch series in series in various units of the battery pack can provide overcurrent and over temperature protection for the circuit.　　2) Protection requirements: In the event of a malfunction, the voltage of the mobile phone can reach 16V, and the voltage of the computer can reach 24V; Its current can reach 100 amperes. In overcharging conditions, the battery pack needs to be protected against overheating. NiCD batteries cannot exceed 120C, and NiMH and Li Ion batteries cannot exceed 90C.　　The ultra small package (0402 specific

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Fuseless car charger, carefully burn your phone

07

2023-04