Mitsubishi Electric ME96SSHA-MB, Руководство пользователя

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59
Installation 3. Wiring
CAUTION
Do not work with live wires
Do not connect with live wires. It may cause electric shock, burns, device burn out, or fire.
It is recommended that a protection fuse be used for VT and the auxiliary power source.
Do not open the secondary side of the CT circuit
Connect the CT secondary side signal correctly to the terminal for CT connection.
If the CT is not connected properly or if the secondary side of the CT is open, it may result
in high voltage on the secondary side of the CT, the insulation of the secondary winding
wire may be damaged, and burnout may be caused.
Do not short the secondary side of the VT circuit
Connect the VT secondary side signal correctly to the terminal for VT connection.
If the VT is not connected properly or if the secondary side of the VT shorts, over current
may flow to the secondary side of the VT, which can burn out the secondary winding wire.
If the secondary winding wire burns out, it can damage the insulation of the primary
winding wire, resulting in a short between phases.
Make sure connections to the connection terminals are tight
Electrical wires must be properly tightened to the connection terminal.
Otherwise, heat and measurement errors may be caused.
Do not forget wiring of “C
1
”
,
”
C
2
”
and
“
C
3
”
for pass.
When the L side of CT circuit is common wire, it is necessary to short-circuit
“C1”,”C2”,
and
“C3” terminal of this device.
Do not use improper electrical wires
Make sure that the electrical wires have the proper rating for current and voltage.
If inappropriate electrical wires are used, fire may be caused.
Do not pull the connection wires with force
If the terminal wiring is pulled with a strong force, the input portion may detach.
(Tensile load: 39.2N or less)
Do not apply an abnormal voltage.
If a pressure test is given to a high-pressure device, a ground must be used in order to
avoid damaging this measurement instrument. If a high voltage of AC2000V is applied for
over one minute to the measurement instrument, damage may occur.
Do not connect to Non-Connection (NC) terminal.
Do not connect to Non-Connection (NC) terminals for the purpose of relay etc.
Use the proper voltage for the auxiliary power source.
Use the proper voltage for the auxiliary power source terminal.
If an improper voltage is used, the instrument may be damaged or fire may be caused.