Mitsubishi Electric ME96SSEB-MB User Manual page 67

7. Installation
7.3. How to Connect Wiring
Do not work for wiring
It may cause an electric shock, burn injury, burnout of the instrument, or a fire.
We recommend that you install protection fuses for VT and auxiliary power unit.
Connect the CT secondary-side signal correctly to the terminal for CT.
If the CT were incorrectly connected or if the CT secondary side were open, it could
result in a high voltage generation at the CT secondary side and insulation breakdown
in the CT secondary winding. It might cause burnout.
Connect the VT secondary-side signal correctly to the terminal for VT.
If the VT were incorrectly connected or if a short occurred at the VT secondary side, an
overcurrent would flow through the VT secondary side and it would cause burnout in the
VT secondary winding. The burnout of the secondary winding would lead to insulation
breakdown in the secondary winding. Finally, it might cause short circuit between
phases.
Connect electrical wires properly to the connection terminal.
Otherwise, heat generation or measurement errors may occur.
CAUTION
When a common wire is used for L side (load side) of the CT circuit of a 3-phase
instrument, it is necessary to short-circuit the C1, C2, and C3 terminals of the instrument.
Be sure to use an appropriate size wire compatible with the rated current and voltage.
The use of inappropriate size wire may cause a fire.
If you pulled the terminal wires with a strong force, the input terminal part might come
off. (Tensile load: 39.2N or less)
If the pressure test of a high-pressure device is performed, ground the input lines of CT
and VT secondary sides in order to prevent damage to the instrument. If a high voltage
of AC 2000 V were applied to the instrument for over one minute, it might cause a failure.
Do not connect to the Non-Connection (NC) terminal for the purpose of relay.
Supply proper voltage to the auxiliary power terminal.
If an improper voltage were applied, it might cause a failure of the instrument or a fire.
Do not work under live wires
under live line conditions.
Do not open the secondary side of CT circuit
Do not short the secondary side of VT circuit
Securely connect to the connection terminal
Do not forget to connect wiring of 'C
Do not use improper electrical wires
Do not pull connecting wires with a strong force
Do not apply an abnormal voltage.
Do not connect to Non-Connection (NC) terminal.
Supply voltage properly to the auxiliary power source.
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', 'C ' and 'C '
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