Motor starting current analysis

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There are different opinions on how many times the motor's starting current is the rated current, and many of them are based on specific circumstances. For example, more than ten times, 6 to 8 times, 5 to 8 times, 5 to 7 times, etc.At the moment when the motor starts (that is, the initial moment

Why UPS batteries catch fire easily

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A UPS battery (uninterruptible power supply battery) is a device used to provide a temporary power supply, often used to protect computers, network equipment and other critical equipment during power outages or power fluctuations. It can store electrical energy and automatically convert to backup po

The most common categories of grounding for electrical equipment

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At present, the common grounding classifications are as follows: repeated grounding, protective grounding, working grounding, lightning protection grounding, shielding grounding, and anti-static grounding.1 Repeat groundingRepeated grounding: In a system with the neutral point directly grounded, a m

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