Main Differences Between AC and DC GeneratorsAn electrical machine is a device that converts mechanical energy into electrical energy and vice versa. A generator is a type of such machine that converts mechanical energy into electrical energy. However, the electrical energy generated can be in either alternating current (AC) or direct current (DC) form. Thus, the primary difference between AC and DC generators is that they generate alternating current and direct current respectively. While there

Definition: An energy meter is a device used to measure the electrical energy consumed by an electrical load. Electrical energy refers to the total power consumed and utilized by a load over a specific period of time. Energy meters are used in domestic and industrial AC circuits to measure power consumption. They are relatively inexpensive and accurate.Construction of an Energy MeterThe construction of a single - phase energy meter is shown in the figure below.The energy meter consists of four m

Substance of Second - harmonic Restraint in Overcurrent ProtectionThe substance of second - harmonic restraint in overcurrent protection is to use the second - harmonic component to judge whether the current is a fault current or an excitation inrush current. When the percentage of the second - harmonic component to the fundamental - wave component is greater than a certain value, it is judged to be caused by the excitation inrush current, and the overcurrent protection is blocked.Therefore, the

Open - Circuit Fault on the Secondary SideOpen - circuit in the secondary side is a typical fault of low - voltage voltage transformers, showing abnormal voltmeter readings (zero/fluctuation), faulty power meters, buzzing noises, and core overheating. When open - circuited, the secondary voltage spikes (no secondary current to balance the primary EMF), causing core saturation, flux distortion, and potential overheating/damage.Causes include loose terminals, poor contact, or human error. In low

Typical Wiring Diagram of 35kV Line Radial π ConnectionWhen a 35kV line adopts a radial power grid structure, a single - side power supply or a double - side power supply radial type can be used according to the situation of the power supply points, and a loop - out interval is reserved at the end of the line.Typical Wiring Diagram of 35kV Line Radial T - ConnectionFor double - radial lines, it is advisable to select a double - side power supply. When the power supply points do not meet the r

Fault Transfer VoltageIn low - voltage distribution systems, there is a type of personal electric shock accident where the accident occurrence point and the system fault point are not at the same location. This kind of accident occurs because after a ground fault happens elsewhere, the generated fault voltage is conducted to the metal casings of other equipment through the PE wire or PEN wire. When the fault voltage on the metal casing of the equipment is higher than the human - body safe voltag