Speaking of shunt, for ordinary people, this is a relatively professional term. In our lives, shunts are actually very closely related to our lives. Many electronic devices and so on are inseparable from it. In order to help everyone better understand the shunt, today we will tell you what a shunt is.
What is a shunt?
First of all, let’s pay attention to what are the characteristics of a shunt? When connected in a DC circuit, the DC current is generated by a shunt, and millivolts are generated at both ends of the shunt. The DC voltage signal causes the pointer of the meter connected to both ends of the shunt to swing, and the reading is the current value in the DC circuit. The so-called shunt means dividing a small current to push the meter indication. The smaller the ratio of this small current (mA) to the current in the large circuit (1A-tens of A), the better the linearity of the ammeter indication reading and the more accurate it will be. This is a commonly used product for electrical circuits and has diversion measures for lightning protection.
Is a shunt good? A shunt is a resistor that can pass a very large current. Commonly used ammeters of 15A, 20A and 35A require a shunt. The impedance of the shunt = the full-scale voltage marked on the meter head. /meter full scale current. For example, the shunt resistance of a 20A ammeter = 75mv/20A = 0.00375. After the impedance is constant, according to Ohm's law U=IR, the current is proportional to the voltage. The current is linear and the voltage is linear, so you can use a full scale 75mv The voltmeter shows the current current. Therefore, the ammeter used is actually a voltmeter.
What are the main functions? For motor test measurement, an ammeter is often equipped with multiple shunts to solve the problem of ensuring the required measurement accuracy in a larger measurement range. At this time, it is required that the rated voltage drop of all shunts used is consistent with the accompanying ammeter, such as 75mV. In this way, after the shunt is selected, the full-scale range of the ammeter is the rated current value of the selected shunt. The multiple of the ammeter (that is, the number of currents per grid on the dial scale) is the rated current of the shunt divided by the total number of grids on the dial scale.
What are the key points for purchasing a shunt?
What can we do when purchasing a shunt? Wire shunts have now become the first choice for electrical designers in various design institutes, mainly because This product is a national patented product. The conductor material selected for the product is formed from copper and then tin-plated. This ensures that the material selected for the product is the same as the cable conductor. The connection of the conductor is surface contact, and the product's protection level reaches IP63. The wire shunt products cover a wide range of products and have various specifications and models, which can fully meet the power distribution methods under various circumstances.
The pressure diverter combines multiple hydraulic pumps in a flexible and efficient way and is used in multi-circuit hydraulic systems. Each flow divider includes a series of gear pairs, which divide the input oil into several output channels in equal or proportional amounts. The working pressure of each channel can be different from each other, and each channel can be equipped with a safety relief valve. You may wish to refer to this purchasing method.
Generally, network splitters only have a few holes, which are no bigger than an adult’s fist. One side is for plugging in the network cable, and the other side is for connecting the computer network cable. It is usually a rectangular box with three to four interfaces on the outside. When you need to use it, just connect the network cable directly. It can help us buy a better splitter.
Through the detailed introduction of the shunt above, I believe everyone should have a relatively comprehensive understanding and understanding of the shunt. So if you want to purchase a shunt in the future, you can refer to the above introduction method. The editor believes that this can help you buy a shunt with a high cost performance.