Hioki 3166 - Cautions Concerning Wiring

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4.2 Cautions Concerning Wiring
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DANGE
R
Clamp sensor should only be connected to the secondary side of a
breaker, so the breaker can prevent an accident if a short circuit occurs
.
Connections should never be made to the primary side of a breaker,
because unrestricted current flow could cause a serious accident if a
short circuit occurs.
If the secondary circuit is accidentally opened while power is flowing to
the CT, extremely high voltage will be generated at the connector on the
secondary side, which could damage the insulation and create a highly
dangerous condition. Although this power meter can take
measurements through the clamp on sensors without opening the
secondary side, whenever you are connecting another meter, be certain
to short the secondary side before connecting that meter.
Connect the clamp-on sensors or voltage cords to the product first, and
then to the active lines to be measured. Observe the following to avoid
electric shock and short circuits.
・Do not allow the voltage cable clips to touch two wires at the same
time. Never touch the edge of the metal clips.
・When the clamp sensor is opened, do not allow the metal part of the
clamp to touch any exposed metal, or to short between
Voltage input connectors 1 to 3 are common for input connector N, each
input connectors are not insulated.
Do not connect the unnecessary number of cords.
WARNIN
G
To avoid electric shock when measuring live lines, wear appropriate
protective gear, such as insulated rubber gloves, boots and a safety
helmet.
CAUTIO
N
・In order to prevent electric shock and short-circuit accidents, use the
supplied voltage input cables to connect the line to be measured to the
voltage input terminals.
・When the power is turned off, do not apply voltage or current to the voltage
input terminal, clamp on sensor. Doing so may damage the unit.
4
.2 Cautions Concerning Wiring
When connecting the power meter to a live line, be sure to observe the
following warnings.