Knowledge

PCB is the abbreviation of Printed Circuit Board. Because it is made by electronic printing, it is called a "printed" circuit board. PCB is an important electronic component in the

TT grounding method: The first letter T indicates that the neutral point of the power supply is grounded, and the second T is the grounding of the metal casing of the equipment. Th

The three-phase five-wire system includes three phase wires (A, B, C wires), neutral wire (N wire), and ground wire (PE wire) of three-phase electricity. The neutral wire (N wire)

It is best to use standard and standardized wire colors in the application: yellow for A wire, green for B wire, red for C wire, blue for N wire, and yellow-green for PE wire. The

In the low-voltage distribution network, the transmission line generally adopts a three-phase four-wire system, of which three lines represent A, B, C three-phase, and the other is

Divided into triangle connection and Y connection. The load lead of the delta connection method is three live wires and one ground wire, the voltage between the three live wires is

When the coil rotates in the magnetic field, the wire cutting the magnetic field line will generate an induced electromotive force, and its variation law can be represented by a si

Three-phase electricity is three phase wires, and the voltage between the three wires is 380v, which is used for three-phase power supply equipment, such as three-phase motors. Two

1. Cast iron water meter case Cast iron water meter case is cheap, high strength and toughness, but whether it is made of gray cast iron or ductile iron, its forming and processing

Inverters basically have one or more batteries to store energy from solar power or the grid when power is available. When there is insufficient solar energy or the grid is cut off,

Both EPS and UPS are backup power sources that provide power to the load when the AC power fails and is interrupted. EPS is a fire emergency power supply. It is mainly used in emer

The rated output power is the continuous output power, which refers to the output power of the inverter under the rated voltage and current, which is the power that can be continuo