45
Connecting Cables
For leak current measurement
The 9675, 9657-10 Clamp On Leak Sensor can be used.
Clamp the conductor at the center of the clamp core.
When the measurement current level is unknown, set the range level to the 5 A range before
starting measurement.
Transformer
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equipment
Leak
current lg
Class B ground
cable
Class D ground cable
Leak current
lg
Class B
ground cable
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equipment
Single-phase/3-wire circuit
Three-phase/3-wire circuit
Measurement with a ground cable
Clamp only one conductor.
Transformer
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equipment
Leak
current lg Class B
ground cable
Class D ground cable
Leak
current lg Class B ground
cable
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equipment
Single-phase/3-wire circuit
Three-phase/3-wire circuit
Batch measurement
Clamp 3-wires at a time.
Clamp 3-wires at a time.
Clamp all the wires at the center.
• For a single-phase/2-wire circuit, clamp 2-wires.
• For a three-phase/4-wire circuit, clamp 4-wires. When the wires cannot be clamped, you
can still measure using the equipment ground cable.
• If a wire close to the instrument carries a large current, correct measurement may not be
performed. Ensure enough distance for measurement.
• Do not input current exceeding the continuous maximum input in the measurement range.
• When the clamp is opened or the current range is changed, tens of counts may be
displayed, however, this is not a problem. It takes time but the display gradually drops to
0. If measurement is performed before the display returns to 0, the measurement is not
affected.
• The accuracy of AC voltage overlapped with a DC component cannot be guaranteed.
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