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

Electrical engineering learning reference chartElectrical engineering is divided into five parts: foundation, equipment, power system, application, automation and communication, which are specific for reference.

10KV switch switchboard equipment system diagram

Cable protection wiring diagram

The Significance of Series ResonanceSeries resonance is a special phenomenon that occurs in a circuit consisting of an inductor L, a capacitor C, and a resistor R connected in series. When the frequency of the circuit reaches a specific value, the reactance of the inductor and capacitor cancel each other out, resulting in the minimum total impedance and maximum current in the circuit. Series resonance plays a significant role in various fields such as radio communication, filter design, oscillat

The Significance of Series ResonanceSeries resonance is a special phenomenon that occurs in a circuit consisting of an inductor L, a capacitor C, and a resistor R connected in series. When the frequency of the circuit reaches a specific value, the reactance of the inductor and capacitor cancel each other out, resulting in the minimum total impedance and maximum current in the circuit. Series resonance plays a significant role in various fields such as radio communication, filter design, oscillat

Enhancing Dielectric Strength in Vacuum Gaps for High-Voltage InsulationThere are primarily two methods to increase the dielectric strength of a vacuum gap to meet the insulation requirements at high voltage (HV):Increase the Contact Distance in a Two-Contact Configuration: In a vacuum, breakdown is predominantly a surface effect, heavily influenced by the condition of the contact surfaces. Unlike in SF6 gas, where breakdown is primarily a volume effect that scales linearly with the gap length,

Advantages and Disadvantages of a Ring Main Electrical SystemA ring main electrical system is a common topology for distribution networks, especially in medium-voltage and low-voltage power distribution systems. It connects multiple loads or distribution points in a closed loop to distribute electricity. Below are the advantages and disadvantages of a ring main electrical system:I. AdvantagesHigh Reliability Redundant Power Supply: A ring system has two paths for power supply. Even if one sectio

Shunt-Reactor Switching: A Common Practice in Inductive-Load SwitchingShunt-reactor switching is one of the most common practices in inductive-load switching. Shunt reactors are installed to compensate for overhead-line capacitance and are switched in or out based on the momentary line load. Since a shunt reactor can be treated as a lumped circuit element with stray capacitance, the equivalent load circuit can be simplified to a straightforward LC (inductor-capacitor) circuit.Voltage Oscillation

Analyzing Transient Phenomena in Linear Systems Using the Principle of SuperpositionIn analyzing transient phenomena caused by switching operations in linear systems, the principle of superposition is a powerful tool. By combining the steady-state solution that existed before the open-circuit operation with the transient responses induced by short-circuit voltage sources and open-circuit current sources, and considering the current injected through the switch contacts, a comprehensive descriptio

To ensure the superior quality and performance of each AC circuit breaker in terms of materials, design, and assembly, manufacturers perform routine tests on every unit produced. These tests are essential for verifying the reliability and safety of the circuit breakers, confirming their ability to function correctly under specified conditions.For multi-phase circuit breakers consisting of multiple breaker units (such as V-type or T-type configurations), routine testing is conducted on the fully