Wiring - Mitsubishi Electric ME96NSR Operator's Manual

Wiring

1 Applicable Cable Size
The table on the right describes the applicable
wire size.
2 Wiring
■ Input and Output Terminals of the Basic Device
①Strip top of the cable or crimp the ferrule.
②Slacken screws of the terminal block, and insert the cables into
terminal hole.
③Tighten the terminal screws according to the tightening torque
mentioned above.
3 Confirmations
After wiring, make sure the following:
M The wires are connected correctly.
M There is no mistake in wiring.
Wiring Diagram
Three phase 4-wire type : Example of ME96NSR (with VT)
1 2 3 0
k
K +C1
L
C1
l
k
+C2
K
L
C2
l
k
+C3
K
L
C3
l
P1
u
U
P2
V
v
P3
U u
PN
V v
U u
V
v
Load
1. If the polarity of VT and CT is not correct, it cannot be measured correctly.
2. In case of DC auxiliary power, it should be wired correctly because it has polarity. In case of AC auxiliary power, it does not have polarity.
Note
3. For a low voltage circuit, grounding of the secondary sides of VT and CT is not necessary.
4. Always earth the
false operation.
Three phase 3-wire type : Example of ME96NSR-MB
1 2 3
k
K
L
l
k
K
L
l
u
U
V v
U u
V
v
Load
1. Use the shielded twisted pair cable.
2. To the units of both the end of ModBus link, the 120 ohm resistance has to be attached.
This instrument can perform 120 ohm termination by short-circuiting the terminal of "T-"and "Ter".
Note
3. The earth has to be connected to earth by a thick wire of low impedance.
4. Keep the distance between ModBus link to power line.
5. When the setting is 2CT, the use by 3CT wiring cannot correctly measure for phase 2.
24
Applicable wire size
Tightening torque
Strip Gauge
NC
NC
NC
NC
NC
NC
➀ Auxiliary power supply
MB 100 to 240VAC 100 to 240VDC
✽1 For a low voltage circuit,
NC
grounding of the secondary
MA
sides of VT and CT in not
necessary.
✽2 Do not connect to NC terminal.
Protective
Earthing
(+)
➀
(–)
terminal to the protective earth conductor. Earth the terminal with under 100 ohm of earth resistance. Otherwise, there will be a
(with VT, wiring 2CT)
+C1 T+
C1 T–
+C2 Ter
C2 SLD
+C3 SLD
C3
P1 NC
➀ Auxiliary power supply
NC MB 100 to 240VAC 100 to 240VDC
✽1 For a low voltage circuit,
P3 NC
grounding of the secondary
P2 MA
sides of VT and CT in not
necessary.
✽2 Do not connect to NC terminal.
Protective
Earthing
(+)
➀
(–)
Input and output terminals of the basic device
AWG24 to 14
0.4N·m
10mm
■ Terminals of the Optional Plug-in Module
①Strip top of the cable or
crimp the ferrule.
②Insert the cables by
pushing the lever, and
connect by releasing
the lever.
Three phase 4-wire type : Example of ME96NSR-MB (for direct input)
1 2 3 0
k
K
L
l
k
K
L
l
k
K
L
l
Load
Three phase 3-wire type : Example of ME96NSR
1 2 3
k
K
RS485
L
(ModBus)
l
k
K
L
l
k
K
L
l
Load
Terminals of the optional plug-in module
AWG 24 to 14 • When using a stranded wire, use a ferrule. (AWG 16)
–
10mm
Insert hole
+C1 T+
C1 T–
Ter
+C2
C2 SLD
+C3 SLD
C3
P1 NC
P2 MB
P3 NC
PN MA
Protective
Earthing
(+)
(–)
(for direct input, wiring 3CT)
+C1 NC
C1 NC
+C2 NC
C2 NC
+C3 NC
C3
P1 NC
NC MB
P3 NC
P2 MA
Protective
Earthing
(+)
(–)
Lever
RS485
(ModBus)
RS485
(ModBus)
➀
➀