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

High ground systems (usually referred to as high resistance ground systems) are used mainly for the following reasons:Limit ground fault currentReduce the risk of equipment damageIn high-resistance grounding systems, the ground fault current is limited to a relatively low level. When a ground fault occurs, a smaller fault current flows through the ground path. This low level of fault current has less impact on the thermal stress and electrodynamics of electrical equipment (such as transformers,

Adding resistance to a circuit will have different effects on voltage and current, depending on how the resistors are connected (series or parallel). The effects of series and parallel resistances on voltage and current are explained below:Effect of series resistanceEffect of currentIn a series circuit, all components share the same current. Therefore, no matter how many resistors are in series in the circuit, the current through each resistor is the same. Increasing resistance does not change t

There is a correlation between the wattage of the resistor and the heat output.Meaning of wattage of resistorThe wattage (power) of the resistor refers to the maximum power that the resistor can withstand. It reflects the amount of energy that the resistor can consume or emit under normal working conditions. For example, a 5 watt resistor means that it can safely consume or emit no more than 5 watts of power while operating.The production of heat outputWhen a current passes through a resistor, i

Potentiometers and resistors are both components used to regulate the current or voltage in a circuit, but they work in different ways and application scenarios. In power stations and other applications where voltage needs to be regulated, the use of potentiometers instead of fixed resistors to regulate voltage has several potential advantages Tunability: The potentiometer allows the user to adjust the resistance value within a certain range, thus achieving fine control of the voltage or current

What is an Inductive Ballast?Inductive Ballast definitionInductive Ballast is an iron core inductance coil, the nature of inductance is that when the current in the coil changes, it will cause a change in magnetic flux in the coil, resulting in induced electromotive force, and its direction is opposite to the direction of the current change, thus hindering the current change.Working principle of Inductive BallastWhen the 220V 50Hz AC power supply is applied in the switch closing circuit, the cur

What is an Electronic Ballast?Electronic Ballast DefinitionElectronic Ballast is a kind of Ballast, refers to the use of electronic technology to drive the electric light source, so that it produces the required lighting electronic equipment.Working principle of Electronic BallastThe power supply is converted into a DC power supply after passing through a radio frequency interference (RFI) filter, full wave rectification, and a passive (or active) power factor corrector (PPFC or APFC). Through t

What is a Ballast Resistor?Ballast definitionA ballast resistor is a resistor used to limit the current in a circuit and prevent overcurrent faults.Ballast role To maintain the stability of the circuit Compensate for changes and protect other components of the networkClassification of ballasts Inductive ballast Electronic ballastBallast application Used in the ignition system of automobiles Lighting system

What is a Shunt Resistor?Shunt resistance definitionA shunt resistor is a high-precision resistor that uses a very low ammeter resistance to measure the flow of current through a circuit. It is the resistance of a conductor in parallel with a circuit. Because of its particularity, it is generally used in precision electronic products. The smaller the resistance value of the shunt resistance, the more obvious the shunt effect.Shunt resistance characteristic Good structure High stabilityResistance

What is a Pull-up Resistor?Pull-up resistance definitionA resistor used in an electronic circuit to ensure the known voltage state of a signal.Basic structure of pull-up resistorWorking principleOn the wire to which the pull-up resistor is connected, if the external component is not enabled, the pull-up resistor "weakly" pulls up the input voltage signal. When the external component is not connected, the external "looks" high impedance to the input. At this time, the voltage at the input port ca

What is Light Dependent Resistor?Photoresistor definitionPhotoresistor is a kind of semiconductor device based on internal photoelectric effect, and its resistance value depends on the change of incident light intensity. With the increase of incident light intensity, the resistance value of photoresistor decreases, the incident light weakens, and the resistance value of photoresistor increases. The photoresistor has no polarity, and an external voltage in any direction is applied at both ends wh