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

What is Electromotive Force?Electromotive force definitionThe tendency of electrons to move overcomes the resistance of conductor resistance to current and causes charge to flow in a closed conductor loop.The electromotive forceThe work done by a non-electrostatic force to move a unit of positive charge from the negative side of the power supply through the interior of the power supply to the positive side of the power supply.Electromotive force directionFrom the negative terminal of the power s

What is Capacitive Reactance?Tolerance reactance definitionThe charge on the capacitor plate in an AC circuit has a hindering effect on the directional moving charge and is represented by the letter Xc.How the capacitive reactance worksWhen the capacitor is connected to the AC power supply, the free charge does not actually pass through the insulating medium between the two poles, but because the voltage between the two plates is changing, when the voltage rises, the charge accumulates on the pl

The circuit diagram of automatic outdoor lighting

What is Induced Resistance?InductiveResistance definitionWhen a current passes through the coil, an induced electromagnetic field is formed in the coil, which in turn generates an induced current in the coil to resist the current passing through the coil. Therefore, we call this interaction between the current and the coil electrical reactance.Induced reactance calculation formulaXL= 2πfL=ωLInductive reaction The inductor coil has no hindering effect on DC current, and has hindering effect on AC

What is short Circuit Voltage?Short-circuit voltage definitionThe secondary winding of the transformer is shorted, the primary winding is added to the supply voltage, at this time, when the secondary winding flows through the rated current, the voltage value measured at both ends of the primary winding.Uk%=Ur/Ue ×100%Physical meaningShort-circuit voltage is an important characteristic parameter of transformer, which is the basis for calculating the equivalent circuit of transformer and analyzing

Circuit diagram of delayed hallway lights off

What is short-circuit Current?Short circuit current definitionShort-circuit current is the current flowing through the power system when an abnormal connection occurs between phase and phase or between phase and ground (or neutral line) during operation. The value can be much greater than the rated current and depends on the electrical distance between the short circuit point and the power supply.Type of short circuit Three-phase short circuit Two-phase short circuit Single to ground short circu

A simple circuit diagram of delayed lights off

What is a Glow Starter?Glow starter definitionThe spark starter is a glass bubble filled with neon gas, static contact plate, moving contact plate, bimetal plate, etc., used to preheat the fluorescent lamp filament, and increase the voltage at both ends of the lamp to light the automatic switch of the lamp.Extender part of opener: CapacitorCapacitive action: The role is to absorb the harmonics generated by glow discharge, so as not to affect the normal operation of TV, radio, audio, mobile phone

Stepless dimming by phase-shift trigger