Hioki PD3259-90 Instruction Manual page 61

Appendix
Appx. 1 About 3-phase Circuits
3-phase 400 V lines
1
240 V*
1
240 V*
The 400 V lines depicted in the figure have a line voltage of
415 V yet have a voltage relative to ground of approximately
240 V. It is possible to measure this circuit using a
measuring instrument rated for an input-to-ground voltage of
300 V.
The PD3259's input-to-ground voltage rating of 400 V
enables it to be safely be used to measure lines with a line
voltage of 415 V.
1
240 V*
Ground
2
415 V*
2
415 V*
2
415 V*
Displayed voltages
*1: Voltage relative to
ground
(For 3-phase/4-wire
circuits, equivalent
to phase voltage)
*2: Line voltage
Appx.
1
2
3
4
5
7
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