11
1
2
3
4
5
6
7
8
9
10
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• To avoid damage to the product, do not short-circuit the output
terminal and do not input voltage to the output terminal.
• Voltage input terminals U
1
, U
2
, and U
3
are common to the N ter-
minal and are not insulated. To avoid the risk of electric shock,
do not touch the terminals.
• Note that the product may be damaged if current or voltage
exceeding the selected measurement range is applied for a long
time
• When the power is turned off, do not apply voltage or current to
the voltage input terminals or clamp sensor. Doing so may dam-
age the product.
• To prevent damage to the instrument and sensor, never connect
or disconnect a sensor while the power is on, or while the sensor
is clamped around a conductor.
• When the voltage or current for the power line being measured
exceeds the maximum input for this device, use an external
VT(PT) or CT.
• When using an external VT(PT) or CT, make sure you use a
device with a minimal phase difference. By setting the VT(PT)
or CT ratio, you can read measurement values directly.
Using VT(PT) and CT
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