7
Safety Precautions
■
Precautions on preparation before use
Observe the use conditions and environment requirements for installation place.
You must set up the instrument before use. Read the manual carefully to set it up correctly. If the setup is
incorrectly done, the instrument will not be properly operated.
Check the power rating of the instrument and then apply proper voltage.
■
Precautions on how to use
When operating the instrument, check that active bare wires do not exist around it. If any bare wire exists,
stop the operation immediately and then take appropriate action such as insulation protection.
If a power outage occurs during the setup, the instrument will not be set up correctly. Set it up again after
power recovery.
CAUTION
Do not disassemble or modify the instrument to use. Otherwise, a failure, an electric
shock, or a fire can be caused.
Use the instrument within the rating specified in the manual. If you used it outside the
rating, it might cause not only a malfunction or failure of the instrument but also ignition
or burnout.
Do not open the CT secondary side while the primary current is energized. When the CT
secondary side circuit is open, the primary current flows. However, the secondary
current does not flow. Therefore, a high voltage is generated at the CT secondary side
and the temperature rises, resulting in insulation breakdown in the CT secondary
winding. It may lead to burnout.
When external equipment is connected to the external terminals, the instrument and
external equipment must not be powered and be used after the definitive assembly on
a cabinet door.
The rating of the terminal of external equipment should satisfy that of the external
terminal of the instrument.
■
Precautions on maintenance
Wipe dirt off the surface with a soft dry cloth.
Do not leave a chemical cloth in contact with the instrument for a long time or do not wipe it with benzene,
thinner, or alcohol.
In order to properly use the instrument for a long time, conduct the following inspections:
(1) Daily maintenance
①
No damage in the instrument
②
No abnormality with LCD indicator
③
No abnormal noise, smell or heat generation
(2) Periodical maintenance
Inspect the following item every six months to once a year.
①
No looseness of installation and terminal block connection
CAUTION
Be sure to conduct periodic inspection under the electric outage condition. Failure to follow
the instruction may cause a failure of the instrument, an electric shock, or a fire. Tighten
the terminals regularly to prevent a fire.
■
Precautions on storage
To store the instrument, turn off the power supplies of auxiliary power and input circuit, remove the wires
from the terminals, and then put them in a plastic bag.
For long-time storage, avoid the following places. Otherwise, there is danger of an instrument failure or
r
educed product life time.
The ambient temperature exceeds the range -25°C to +75°C.
The average daily temperature e35°C.
The relative humidity exceeds the range
0 to 85% RH
, or condensing.
Exposed to much dust, corrosive gas, salty environment, or oil mist.
Exposed to excessive vibration or impact.
Exposed to rain or water drops.
Exposed to direct sunlight.
Pieces of metal or inductive substances are scattered.
