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Installation 4. Wiring Diagram
Note for Input
Note
1
.
The voltage input terminals for 3-phase 3-wire are different from those for others.
2
.
If the polarity for VT and CT are wrong, the measurement cannot be executed correctly.
3
.
Do not connect wires to the NC terminals.
4
.
In the case of low voltage, there is no need for grounding of the secondary sides of VT
and CT.
5
.
Always earth the terminal to the protective earth conductor. Earth the terminal with less
than 100 ohm of earth resistance. Otherwise there will be a false operation.
Note for MODBUS
®
RTU
Note
1
.
Use the shielded twisted pair cable. (Recommended cables: Refer to page 82.)
2
.
To the units at both ends of the MODBUS
®
RTU link, the 120-ohm resistance has to be
attached. This instrument can perform a 120-ohm termination by short-circuiting the
terminal of T/R- and Ter.
3
.
The earthing has to be connected to earth by a thick wire of low impedance.
4
.
Keep the distance between MODBUS
®
RTU link to power lines.
5
.
Connect to earth the SLD terminal at one end.
Содержание ME96-SSE-MB
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