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

A switching power supply's output voltage being too high can be caused by several factors. Here are some common reasons and their explanations:1. Feedback Loop FaultsFaulty Feedback Resistor or Capacitor: Damage to the resistors or capacitors in the feedback loop can cause the feedback signal to be inaccurate, leading to an increase in output voltage.Optocoupler Failure: Optocouplers are commonly used in switching power supplies to transmit feedback signals. If the optocoupler is damaged or aged

Comparison and Analysis of Three-Way Switches and Four-Way SwitchesThe advantages of a three-way switch Simple Installation and Wiring: Compared to four-way switches, three-way switches have relatively simple circuit designs and installations, requiring no complex wiring, thus resulting in lower installation costs. Lower Cost: Due to the relatively simple structure of a three-way switch, its production cost and market price are typically lower than that of a four-way switch. Wide range of applic

Layout of 10kV closed high voltage switchgear(a)single-row(b)double-row(c)Single row layout(d)double row layout

A Ground Fault Circuit Interrupter (GFCI) socket is a protective device specifically designed to prevent an electrical shock. It can detect the leakage current in the circuit and quickly cut off the power supply when the leakage current exceeds a predetermined threshold to protect personal safety. There are many ways to determine whether the GFCI socket has electricity, and the following are some commonly used methods:Viewing lightMany GFCI outlets have an indicator light (usually red or green)

A bipolar circuit breaker is an electrical protection device used to provide overload and short circuit protection in a circuit. The main difference between it and the single-pole circuit breaker is that the bipolar circuit breaker can control two electrical routes at the same time (usually the live line and the neutral line), while the single-pole circuit breaker can only control one electrical route.Characteristics of bipolar circuit breakers Control two lines at the same time: bipolar circuit

When connected to a higher than normal input power supply (voltage), the fuse takes longer to blow, mainly for the following reasons:The effect of current and voltage relationshipOhm's law in actionAccording to Ohm's law (where is the current, is the voltage, is the resistance), in the case of constant circuit resistance, the voltage increase usually leads to an increase in the current. However, for some circuits containing inductors, capacitors and other components, the voltage increase does no

A fuse is a device used for circuit protection, the main function is to cut off the circuit in the case of overcurrent to prevent damage to the equipment or line. The rating of the fuse mainly refers to its rated current, not rated voltage, because the main role of the fuse is to protect the circuit from overcurrent, not overvoltage. The following is a detailed explanation of the rated maximum current of the fuse and its reasons:Rated current of the fuseRated currentThe rated current of the fuse

10KV Switchgear relay protection circuit

What are Faults in Transformer?Definition of Transformer FaultsFaults in transformer refer to issues like insulation breakdowns and core faults that can occur inside or outside the transformer.External Faults in Power TransformerExternal Short Circuit of Power TransformerShort circuits can happen in two or three phases of the electrical power system. The fault current is usually high, depending on the short-circuited voltage and circuit impedance up to the fault point. This high fault current in

Capacitor Bank Protection DefinitionProtecting capacitor banks involves preventing internal and external faults to maintain functionality and safety.Element FusesManufacturers usually include built-in fuses in each capacitor element. If a fault occurs in an element, it is automatically disconnected from the rest of the unit. The unit can still function, but with reduced output. For smaller capacitor banks, only these built-in protection schemes are used to avoid the cost of additional protective