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2.3 Making the Connections
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2.3.1 Direct Connections
DANGER
Always connect the power meter to the secondary side of a breaker.
On the secondary side of a breaker, even if the lines are shorted the
breaker can trip and prevent an accident. On the primary side,
however, the current capacity may be large, and in the event of a
short-circuit there may be a serious accident.
Shut off the line power supply before connecting the voltage cable
and current cable.
If the voltage cables should be detached and touch the two wires, a
shorting accident or electric shock may result.
The maximum input voltage and current are 600 VAC, 60 A. Do not
measure an input in excess of these limits, as the resulting heat
buildup may damage the unit or cause a short-circuit accident.
Once the connections are made, do not touch the input terminals of
the voltage and current transformers. There are exposed live parts,
and a danger of electric shock or serious accident.
Check that the terminals are tightened securely. If the connections
should become detached, there is a danger of a short-circuit or
electric shock accident. Additionally, if the connections are not
properly tightened, the contact resistance increases, which may lead
to the generation of heat, or fire.
WARNING
In order to prevent electric shock and short-circuit accidents, shut
off the power to the line to be measured before connecting the
direct connection voltage and current cables to the terminals.
Be sure to connect the voltage input terminals or current input
terminals correctly. Measurement which is attempted with the wiring
connected incorrectly may cause damage to the unit or a short-
circuit.
Do not short circuit between voltage input terminals, when making a
connection. If not, a shorting accident or electric shock may result.
To prevent accidental electrocution or short-circuits, make
connections to the voltage and current input terminals using only
insulated wire that is terminated with pressure-fitted terminals. (The
voltage and current input terminals have an M6 axial diameter.)
Before switching on power for the line to be measured, check that
the connections and the wiring are not shorting between the voltage
input terminals. If there is a short circuit, a electrical shock and or
short circuit accident will occur.
2.3 Making the Connections
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