Free Expert Guides on Power Systems, Circuit Design & Electrical Troubleshooting

Touching a high-voltage wire while in the water is indeed more dangerous.Here's an explanation Enhanced Conductivity: Water is an excellent conductor of electricity, especially when it contains impurities such as salt water or sewage. When a person is in the water, the conductivity of the body significantly increases, which means that current can more easily pass through the human body. Reduced Insulation: In water, the insulation provided by human skin and clothing is significantly diminished.

The reason for using fuses on the low-voltage side of large power systemsProtect Circuit SafetyThe main function of a fuse in a circuit is to protect the safety of the circuit. When there is a fault or abnormality in the circuit, such as overloading or short circuit, the current will increase sharply. In this case, the fuse will automatically fuse and cut off the current, thus preventing damage to the devices in the circuit and avoiding the occurrence of safety accidents such as fire.Overload Pr

The following types of cables can mainly be used to supply power to consumers through overhead cables:I. Overhead insulated conductorsCharacteristicsOverhead insulated conductors are based on traditional overhead bare conductors and have an insulating layer added. This insulating layer is usually made of materials such as polyethylene or cross-linked polyethylene and has good insulating properties and weather resistance.Compared with overhead bare conductors, overhead insulated conductors can ef

Adding an extra wire (or conductor) to a parallel circuit has several notable effects on the circuit: Enhanced Current Capacity: One of the main characteristics of a parallel circuit is that it allows more current to flow through. When an additional wire is added, the overall current-carrying capacity increases. This is because the parallel circuit provides more paths for the current to flow through, thereby reducing the overall resistance and allowing more current to pass. Voltage remains const

Why are transmission lines high in voltage and low in current?During the process of power transmission, high-voltage transmission is often adopted to reduce energy loss. The specific reasons are as follows: Reduce Current: According to Ohm's Law (P = UI), when transmitting the same power, the higher the voltage, the lower the current. Lower current means that the resistive losses in the transmission lines (P = I²R) will also be reduced. Reduce Heat Losses: High-voltage transmission can significa

When high-voltage power lines come into contact with the ground, sparks are generated primarily due to the discharge phenomenon caused by the potential difference. Here is a detailed explanation:Potential DifferenceHigh-voltage power lines typically carry thousands of volts or even higher. The ground is considered a reference point with zero potential. When a high-voltage power line comes into contact with the ground or another grounded object, a significant potential difference (voltage differe

The electromagnet used in generators and the permanent magnet used in DC motors have the following differences:I. In terms of working principleElectromagnetIn generators, electromagnets usually generate a magnetic field through energized coils. When the rotor of the generator rotates, the change in the magnetic field will induce an electromotive force in the stator winding, thereby generating current. For example, in large AC generators, electromagnets can control the strength of the magnetic fi

In the following situations, a clamp ammeter is more convenient than a voltmeter:I. In occasions for measuring alternating currentNo need to disconnect the circuitA clamp ammeter can measure alternating current without cutting off the circuit. For example, when checking the current of an electrical device in operation, a clamp ammeter can directly clamp the wire without disconnecting the circuit for wiring operations, avoiding interference to the operation of the device and the possible safety r

A precise electrical two-core concentric cable is a type of cable with specific structural and performance characteristics.I. Structural characteristicsConcentric structureThis cable consists of two conductors. Usually, one is located at the center and is called the inner conductor, and the other surrounds the inner conductor and is called the outer conductor. The inner and outer conductors are arranged concentrically, which gives the cable good symmetry and stability. For example, in some high-

1. Multimeter Resistance Measurement Principle Related CausesMultimeter Internal Power Supply PrincipleWhen measuring resistance with a multimeter, an internal battery is used to power the device. The multimeter forms a circuit with the measured resistance through its internal circuitry, and the resistance value is measured according to Ohm's Law. If the DC source is not disconnected, the external power supply will interfere with the measurement loop formed by the multimeter's internal circuit a