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Phase sequence indicator

2017-08-17 11:41  
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Simple, portable phase-sequence indicator determines the proper phase rotation in polyphase circuits. Major components are two neon lamps, two resistors, and a capacitor. In operation, the leg voltages are unbalanced, so that the lamp with the maximum voltagea€”or proper phase sequencea€”lights
Phase sequence indicator

Table shows typical component values for various circuit frequencies.

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