What causes inrush currents? Thank you

Inrush current refers to the current characteristics of electrical equipment at the moment of switching, which is very important for the safety of power supply network and electrical equipment. Inrush current suppression is often required in engineering.

Inrush current refers to the peak current flowing into the power supply device at the moment the power supply is turned on. Because the input filter capacitor charges quickly, this peak current is much greater than the steady-state input current. The power supply should limit the level of surge that AC switches, rectifier bridges, fuses, and EMI filters can withstand.

Repeatedly switching the loop on and off, the AC input voltage should not damage the power supply or cause the fuse to blow.

Inrush current also refers to the non-repeatability maximum forward overload current caused by circuit abnormalities that cause the junction temperature to exceed the rated junction temperature.

Summary. 1. Damage to electronic equipment: increase the cost of maintenance and replacement;

2. There will be failures;

1) There will be temporary shutdown of the equipment;

2) The operation control of the equipment will be interrupted (memory loss, system operation termination) 3) The aging phenomenon of the system will be accelerated, which will increase the maintenance cost.

What is the effect of a bad power surge on the voltage.

1. Damage to electronic equipment: increase the cost of maintenance and replacement; 2. There will be failures; 1) There will be temporary shutdown of the equipment; (2) The operation control of the equipment will be interrupted (memory loss, system operation termination) 3, the aging phenomenon of the system will be accelerated, which will increase the cost of dimensional sail repair.

1. It is a high-voltage pulse, which can be as high as thousands of volts; 2. Its duration is very short, usually the time is subtle, but the residual limb is to make it clear that the surge overvoltage is not equal to the transient overvoltage; 3. The voltage rise rate is very high. The surge overvoltage is guessed in two aspects, most of it is internal, and the rest of the silver is due to external factors.

The induced current generated by the change in the magnetic field generated by atmospheric discharge (lightning) on the overhead power line will impact the power grid, and the use of electrical appliances to withstand the impact of instantaneous high current is fatal to electronic equipment, so it is necessary to install anti-surge equipment in the circuit used by these equipment.

An electrical surge is a spike that occurs instantaneously beyond a stable value, and it includes the surge voltage and inrush current.

A surge, also known as a surge, is an instantaneous overvoltage that exceeds the normal operating voltage. Essentially, a surge is a violent pulse that occurs in just a few millionths of a second. Possible causes of surges are:

Heavy equipment, short circuits, power switching, or large engines. Products containing surge arrest devices can effectively absorb bursts of tremendous energy to protect connected devices from damage.

Surge protective device (SPD) refers to a device designed to limit transient overvoltages and divert surge currents. It contains at least one nonlinear element, which used to be called a "surge arrester" or "overvoltage protector".

Power surges (also known as surges) and peak voltages.

Surges and peak voltages (pulses) are "regular" voltage increases, usually caused by drastic fluctuations or increased power demand. Turn on the big surge.

1] Power appliances, vacuum cleaners, air conditioners, and washing machines can all trigger power surges and peak voltages. Any type of interference is capable of damaging electronic devices. Beyond the scope of actual repairs.

In addition, inclement weather (lightning) and the power company's daily shut-off and maintenance work can cause damaging power surges to power lines. Surge performance characteristics · B+C level protection has a large flow rate, extremely low residual pressure, and fast response timeAdopt the latest arc extinguishing technology to completely avoid fire;Adopt temperature control protection circuit and built-in thermal protection;Built-in remote alarm dry contact, easy to remote monitoring;Equipped with lightning counter to accurately record the number of lightning strikes;With power status indicator, indicating the working status of the surge protector;The core components adopt international well-known brands with excellent performanceRigorous structure, stable and reliable work.

How surge protectors work.

Surge protectors act like power sponges, absorbing dangerous extra voltages, preventing most of these voltages from entering your sensitive equipment. Surge-proof sockets with ** line protection provide your electrical equipment with the most complete protection against harmful power surges. Power surges and voltage spikes can disrupt or degrade the performance levels of your valuable electronic equipment through ** and power lines.

Comprehensive surge protection protects appliances such as computers, modems, televisions and other household electronics and appliances at all times. The anti-surge socket can make your electrical equipment and equipment lightning protection, stable work, and prolong the service life of electrical appliances.

The maximum instantaneous current flowing into the filter capacitor inside the power supply at the moment the power supply is turned on is called the input inrush current and is measured in (a).

The input inrush current is the data necessary for the customer to select the switch and external fuse.

The discharge process after the capacitor is charged can generate an inrush current, and the inductor can also generate an inrush current at the moment of disconnection.

In electronic design, surge mainly refers to the strong pulse generated by the power supply (just mainly refers to the power supply) when it is just turned on, and the nonlinearity of the circuit itself may be higher than the pulse of the power supply itself; Or because the power supply or other parts of the circuit are disturbed by itself or external spikes, it is called a surge. It is likely to cause the circuit to burn out at the moment of the surge, such as the breakdown of the p-n junction capacitance, the resistor burn-out, and so on. Surge protection is a protection circuit designed by using nonlinear components to be sensitive to high frequency (surge), and the simple and commonly used are parallel large and small capacitors and series inductors.