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

The most serious faults in a power system usually refer to those that pose the greatest threat to system stability, equipment safety, and power supply reliability. Here are some of the most common types of serious failures in power systems and their effects:Three-phase Short CircuitThree-phase short circuit is one of the most serious faults in the power system, it occurs between the three phases of the wire or between one or more phases and the ground short. This fault will lead to a large short

Effect of phase Angle on power system failureWhen a power system fails, the phase Angle between voltage and current changes. This change is essential for understanding and analyzing the operating state of the power system. The following is a detailed explanation of the effect of phase Angle in the case of failure:Change in phase Angle Fault type and phase Angle: A short circuit fault, whether symmetrical or asymmetrical, can cause a significant change in the phase Angle between voltage and curre

When using insulated tools, proper methods and precautions are very important to ensure safety and avoid potential hazards. Here are some common mistakes and precautions to take:Common mistake Using broken tools: Using cracked, broken, or worn insulation tools may result in reduced insulation performance, which increases the risk of electric shock. Ignoring checks: Neglecting to check the status of insulated tools before each use may result in the use of unqualified tools. Improper storage: Stor

People choose to use low voltage/low current power supplies instead of high voltage/high current power supplies in many cases, mainly for safety, efficiency, economy and applicability considerations. Here are some of the main reasons:SecurityReduce the risk of electric shockLow voltage power supplies have a lower risk of shock than high voltage power supplies. The safe voltage of the human body is generally considered to be below 36 volts (depending on environmental humidity and other factors),

Low Voltage (LV) systems generally refer to electrical systems with operating voltages below 1000 volts (V) alternating current or 1500 volts direct current. Although low pressure systems are safer than high pressure systems, there are several potential hazards. Understanding these risk factors can help you take preventive measures to keep people and equipment safe. The following are common causes of danger in low-pressure systems:Electrical injury Electric shock: Direct contact with a live cond

Touching the poles of the power supply without a load is dangerous for several reasonsRisk of electric shockHuman conductionThe human body is an electrical conductor, and when the poles of the power supply are touched, the current passes through the body to form a loop. If the voltage of the power supply is high, the current may reach dangerous levels and cause electric shock injury to the human body.For example, the voltage of household electricity is usually 220 volts, which is enough to cause

Ensuring the safety of people passing under high-voltage wires is a crucial task. High-voltage transmission lines are designed and constructed according to strict safety standards and regulations to minimize risks to the public. Here are some common measures to ensure the safety of high-voltage wires:Using InsulatorsInsulators are commonly used components in high-voltage wires to fix the wires to towers or poles and prevent current from conducting through the towers or poles to the ground. Insul

What is Buchholz Relay in Transformer ?Buchholz relay is a gas relay used in oil-immersed transformers to monitor the gas production inside the transformer, so as to detect possible faults inside the transformer.How Buchholz relays workThe Buchholz relay works on the basis of the gas produced when the transformer fails internally. When overheating or discharge failure occurs inside the transformer, gas is produced. These gases will rise and pass through the top of the tank into the oil storage t

What is the Differential Protection of Transformers?Differential Protection DefinitionThe differential protection of transformer is an important relay protection method, which is used to detect the faults inside the transformer, such as winding short circuit, turn short circuit and so on. Differential protection determines whether there is a fault by comparing the difference in current on both sides of the transformer.Principle of differential protectionDifferential protection is based on a basi

What is Over Fluxing in Transformer ?Over Fluxing DefinitionOver fluxing in a transformer occurs when the magnetic flux density exceeds the designed limit, leading to potential damage.Causes of Over FluxingOver fluxing can be caused by overvoltage, low-frequency power generation, lightly loaded transmission lines, and inadequate shunt compensation.Effects of Over Fluxing Over voltage causes due to sudden load rejection Low frequency generation of power Transmission line is lightly loaded Proper