Wiring systems
KEW 2062/2062BT
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KEW 2062/2062BT
Wiring systems
Select “Wiring configuration” and press the mode button to adjust wiring configurations. Select
the appropriate one out of five wiring configurations according to the wiring system to be tested.
* For Single-phase 3-wire(1P3W), please select “1P2W” (Single-phase 2-wire) and perform
power measurement on each phase (L1/ L2) individually. KEW 2062 / 2062BT cannot
show the total power of 1P3W.
Item switching button
[◄►]
: toggle the available wiring configurations
Single-phase 2-wire Balance Three-phase 3-wire Unbalance Three-phase 3-wire
Unbalance Three-phase 4-wire Balance Three-phase 4-wire
Press the mode button while the desired wiring configuration is displayed. The selection is
confirmed and the display returns to the selection screen.
VT/ CT ratio
CAUTION
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The display range, when setting VT or CT ratio, is between 0.000 and 9999 (RMS voltage/
current) and between 0.000k and 9999k (power). Please take the display range into
consideration when setting VT or CT ratio. If setting extremely large or small VT or CT
ratio, the LCD may show 0 or OL and wouldn’t change.
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Allowable input is 1100 V to AC voltage terminal and 1100 A to current sensor, regardless
of selected VT or CT ratio. If output of the connected VT or CT exceeds these values,
the LCD shows OL.
This setting is required if the system to be
tested has external VT(s) or CT(s). The set
VT/ CT ratio will be reflected to all the values
measured during any measurements related
to voltage and current.
While the LCD is showing VT or CT ratio, press the mode button. Then 4-digit value is displayed
and the changeable digit starts blinking. Selectable range is between 0.001 and 9999.
The digit selected to be changed will blink.
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KEW 2062/2062BT
Measurement using VT/ CT ratio
KEW 2062/2062BT
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A short press of item switching button [◄►] increases or decreases the value by 1. A long
press of the item switching button changes digit position (to right or left). When pressing the
button, while the last digit is blinking, not a digit position but a decimal point moves. A long
press of mode button while changing values or digit position cancels the changes and
restores the setting to 1.000.
Press the mode button to confirm the changes. The display returns to the selection screen.
Measurement using VT/ CT ratio
DANGER
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This instrument is rated to 300 V AC for CAT IV, 600 V AC for CAT III, and 1000V AC for
CAT II. With attention to the measurement category to which the object under test
belongs, do not make measurements on a circuit in which the electrical potential exceeds
these values.
● Always clamp the
secondary side of VT or CT (transformer).
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Do not open-circuit the secondary side of CT while it is energized; otherwise, dangerous
high voltage will be generated at the secondary side.
CAUTION
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When using a VT or CT, the declared measurement accuracy is not guaranteed. If using
either or both of them, please take the accuracies of KEW 2062 / KEW2062BT, VT and CT, and also
phase characteristics into consideration.
If voltage or current values of the measurement line exceed the max measuring range of
KEW 2062 / 2062BT, the primary side value of the line can be obtained by measuring the
secondary side using proper VT or CT for the specific line’s voltage or current. See the
diagram below.
Example:
Single-phase 2-wire (1P2W)
V
V
N
L
Power
source
Load
VT
CT
i
Single-phase 2-wire Balance Three-phase 3-wire Unbalance Three-phase 3-wire
Unbalance Three-phase 4-wire
Balance Three-phase 4-wire
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