39
Measuring Leakage Current
Single-phase 3-wire circuit
• If the insulation on the wire has deteriorated at location
A
in the figure, you can detect the leakage current
through the measurement by clamping around bundled wires, not at location
3
but location
2
.
•
If the insulation on the load device has deteriorated at location B in the figure, you can detect the leakage
current through the measurement by clamping around the bundled wires, not at location 5 but location 4.
A
2
1
3
4
5
B
Ig
Ig:
Leakage current
PE
Load device
Load device
Circuit breaker
HIOKI CM4002A961-02
Содержание CM4002
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