Hioki 3155-01, Instruction Manual

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6.4 Earth Leakage Current Measurement Mode (for IEC/TR 60990)
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6.4.2 Connecting Equipment for Earth Leakage Current
Measurement (for IEC/TR 60990)
CAUTION
・
The maximum current that can be input into the leakage current
measurement terminals of the 3155 is 25 mA (AC+DC). The input of any
larger current will cause the beeper to sound (when the beeper is turned on),
after which continued input may cause the fuse in the measurement network
to fail. In this case, input must be terminated immediately.
Afterwards, a fuse check is performed automatically upon returning to the
initial screen from the leakage current measurement mode. Therefore, do
not connect anything to leakage current measurement terminal T1. (If
anything is connected, the display may show "Measurement Network Fuse
blown.")
・
The rated capacity of the auxiliary power socket is 1500 VA or less. If this
capacity is exceeded, the auxiliary power outlet circuit breaker will actuate,
and the power supply to the equipment to be measured will be cut off.
(With the 3155-01, the main power switch is turned off.)
・
When power of the equipment to be measured exceeds 1500VA, make the
connection directly to the outlet; do not use the auxiliary power socket.
(When measuring class
equipment, connect the protective earth conductor
of the equipment to be measured to the G terminal of the 3155.)
In this case, the power source polarity and the condition of the equipment to
be measured cannot be set on the 3155.
NOTE
Equipment to
be measured
・ When measuring earth leakage current (for class equipment only), do not
make any connections to the leakage current measurement terminals. The
measurement network is connected via internal wiring. Plug the power cord of
the equipment to be measured into the auxiliary power socket found on the
right side of the 3155.
・ When the auxiliary power socket does not fit the power plug of the equipment
to be measured, use the supplied power plug.
・ When testing class 0I or other older models, use (UL1015, AWG #18 or
equivalent) wire to connect the G terminal with the protective earth terminal
of the equipment to be measured.