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Testboy TV 455VDE-tester Testboy TV 455 Manuale Utente

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TESTBOY TV 450 
Earth resistance 
 
47 
 
5.7  Earth resistance (model TESTBOY TV 450 (TYPE B)) 
 
Earth resistance is one of the most important parameters for protection against electric 
shock. Main earthing arrangements, lightning systems, local earthings, etc can be 
verified with the earthing resistance test. The measurement conforms to the EN 61557-
5 standard. 
 
 
See chapter 
4.1 Function selection for instructions on 
key functionality. 
Figure 5.29: Earth resistance  
Test parameters for earth resistance measurement 
 
Limit 
Maximum resistance  OFF, 1 
Ω ÷ 5 kΩ 
 
Connections  for earth resistance measurement 
 
 
Figure 5.30: Resistance to earth, measurement of main installation earthing