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September 05,2023

Application of Self Recovery Fuses in the Protection of Rolling Gate Motors.slow blow fuse vs fast blow fuse

　　　　Rolling gate is a widely used door in modern factories and shops, which can not only automatically lift and manually switch, but also be remotely operated. The core of this type of door is to control the forward and reverse rotation of the small motor to achieve its function.　　The rolling gate is driven by a small motor, which not only often gets stuck and cannot move, but also causes the small motor to stall, overload, and burn out due to unstable voltage, high temperature, high humidity, and other reasons. So small motors must be designed with protective circuits to ensure their reliability and stability.　　There are various methods for protecting small motors. Previously, bimetallic temperature controllers were often used for protection. When the coil temperature of the small motor increased, the circuit would be disconnected, and when the temperature decreased, the circuit would be reconnected. If the power supply was not cut off, the motor would continue to be powered on and wo

July 13,2023

Action of fuse and fuse.motor fuse size calculator

　　　　The action of a fuse is achieved by the melting of the melt, and when the current is high, the time required for the melt to fuse is shorter. When the current is low, the melting time required for the melt to melt is longer, and it may not even melt. Therefore, for the melt, its operating current and operating time characteristics, namely the ampere second characteristics of the fuse, are inverse time characteristics.　　Each melt has a minimum melting current. Corresponding to different temperatures, the minimum melting current also varies. Although this current is affected by the external environment, it can be disregarded in practical applications. The ratio of the minimum melting current of the melt to the rated current of the melt is generally defined as the minimum melting coefficient. Commonly used melts have a melting coefficient greater than 1.25, which means that a melt with a rated current of 10A will not fuse when the current is below 12.5A. The relationship between fuse

November 07,2023

frigidaire window air conditioner fuse location.Precautions for using fuses and fuses

　　　　1. The fuse is connected in series with the circuit, installed vertically, and installed on each phase line; Fuses are not allowed to be installed on the neutral line of a two phase three wire or three-phase four wire circuit.　　2. The power input terminal of the spiral fuse should be connected to the center point of the base, and the output wire should be connected to the threaded shell; This insurance is used in places with vibrations.　　When the power load is greater than 60A and the lighting or electric heating load (220V) is greater than 100A, a tubular fuse should be used.　　4. The voltage circuit and electrical control circuit of the electricity meter should be equipped with control fuses.　　5. Porcelain plugs shall be made of qualified lead alloy wire or copper wire, and multiple strands of fuse wire shall not be used instead of a large fuse wire.　　6. The fuse should be intact and undamaged, and the contact should be tight and reliable. In conjunction with the maintenance of th

August 16,2024

Explanation of Parameters in the PPTC Specification for Self healing Fuses

　　　　This is very simple. As long as you know the meaning represented by the parameters in the specification book, you can clearly and quickly view the PTC specification book for self recovery fuses.　　1. IH (Holding Current): The maximum current that can pass through a polymer thermistor PTC in a static air environment at 25 ℃ when it remains inactive. Under limited environmental conditions, the device can maintain an infinite amount of time without transitioning from a low resistance state to a high resistance state. (If the current passing through PTC is insufficient to cause the PTC to self heat up beyond the Curie temperature, such current is called the non operating current, and the maximum value of the non operating current is called the maximum non operating current)　　2. IT (operating current): The minimum steady-state current at which the polymer thermistor PTC operates within a limited time in a static air environment at 25 ℃.　　3. Vmax maximum voltage (withstand voltage value):

November 23,2023

air conditioner fuse in car.Parameters of self restoring fuses

　　　　1. Rated voltage　　Rated voltage refers to the high voltage that can be withstood after the self recovery fuse is disconnected. The voltage borne by both ends of a self restoring fuse during the connection period is far less than its rated voltage. When selecting a self restoring fuse, it is generally required that its rated voltage be greater than the effective circuit voltage.　　2. Rated current　　The rated current is the high current that a self restoring fuse can operate for a long time. Assuming the protection current is Ir and the rated current of the self recovery fuse should be In, both should meet the following conditions: In=Ir/(fo * f1), where fo is the reduction rate for self recovery fuses of different specifications. For self recovery fuses of ICE specifications, no reduction rate can be added, that is, fo=1. For self recovery fuses of UL specifications, the reduction rate is fo=0.75. To consider the reduction rate after considering temperature, the higher the ambient te

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Fuseless car charger, carefully burn your phone

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2023-04