Emerson frequency converter

2011-06-14View Original

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One of our company’s Emerson EV2000 variable frequency drives is connected to a 5.5KW screw pump. In recent days, the pump has started to experience excessive flow rates, reaching up to 20 units per minute, which caused the drive to shut down. The error code displayed was E013, indicating overload. When I used a multimeter to measure the output voltage, all three phases showed 170V, but why was the voltage between each phase and ground 290V? Shouldn’t the phase voltage be lower than the line voltage? Please offer some advice!

Reply #22011-06-15

The voltage output by the inverter is rectangular pulses at several tens of KHz; now you understand, right?

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Emerson frequency converter

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