What Is the Appropriate Setting for the Starting Frequency of the Inverter

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When the VFD output frequency of the variable frequency speed controller (also called frequency converter, the English abbreviation is VFD (Variable-frequency Drive)) is 0, the motor cannot be started because the motor does not have enough starting torque. Only when the output frequency of the VFD r

What is ferroresonant overvoltage

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There are a large number of "energy storage elements" in the power system, which are capacitors that store electrostatic energy and inductance that store magnetic energy. These components form a variety of oscillation circuits. During normal operation, these oscillation circuits are damped

Causes and prevention of voltage sag

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1. What is a voltage sagVoltage sag, also known as voltage sag or voltage dip, refers to a sudden drop or almost complete loss of the effective value of the power supply voltage, and then rises back to near the normal value. Voltage sag is generally described in terms of retention voltage and durati

Harmonic generation and suppression methods in power supply systems

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How harmonics are generatedHarmonics produced by power generation equipment.Harmonics generated by power transmission and distribution systems.The harmonics generated by the electrical equipment of the power supply system (such as frequency converters, electric furnaces, etc.), among which the harmo

Composition and structure of oil-immersed power transformer

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Oil-immersed Transformer ConstructionThe core part of the three-phase oil-immersed transformer is composed of a closed iron core and windings wrapped around the iron core posts. In addition, there are oil tanks, oil conservator cabinets, casings, breathers, explosion-proof pipes, radiators, tap chan