| This indicator is desigened for easy testing of phase sequence ln three-phase systems with s permissible opeating voltage up to 150-500V.For short,connection,not longer than 5 minutes for one tset,a pushbutton switch is placed on the front plate.A disc with an indicating arrow rotates in the direction of the arrow,if the three phase are properly connected,otherwise the disc rotates in the other direction.By changing of two wires,the phase sequeme will be.corrected to correspon ding designation of the terminals. |
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