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VII.Measurement wiring
Figure 3
Three-pole method measurement wiring diagram
1. Measuring current wire D: wire diameter ≥ 1.5mm2, length is 3 to 5 times the diagonal
length of the ground net;
2. Measuring voltage wire 1: current wire with wire diameter ≥ 1.0 mm2 and length 0.618
times;
3. Measuring voltage line 2: Connect to a down-lead of the measured ground network.
4. Measure the ground wire: connect to a down wire of the measured ground network.
Figure 4
Wiring diagram for four-pole measurement
5. When measuring with four-pole method, draw out two connecting wires from the
ground stakes of the ground grid and connect them to the voltage pole P2 and ground
Summary of Contents for HZDW-DB
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