Testboy TV 455VDE-tester Testboy TV 455 Manuale Utente

 

                              

 

 

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Ul(1)-n(2): Voltage between phase and neutral conductors (or between phases 
L1 and L2) 

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Ul(1)-pe(3): Voltage between phase and protective conductors (or between 
phases L1 and L3) 

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Un(2)-pe(3): Voltage between neutral and protective conductors (or between 
phases L2 and L3) 

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1.2.3: Correct connection – CW rotation sequence, 

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3.2.1: Invalid connection – CCW rotation sequence, 

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f: frequency