KW8M Eco-POWER METER (1A/5ACT input type)
4
Chapter 3 Wiring
3.1 Main unit terminal arrangement
Function No. Function
Back
view
N.C.
①
⑪
P1
①
⑪
L
②
⑫
P0
②
⑫
Power
supply
N
③
⑬
P2
③
⑬
+
④
⑭
P3
Measured
voltage
input
④
⑭
Pulse
input
-
⑤
⑮
CT1
(
+
)
⑤
⑮
+
⑥
⑯
CT1
(
-
)
⑥
⑯
Pulse
output
-
⑦
⑰
CT2
(
+
)
⑦
⑰
+
⑧
⑱
CT2
(
-
)
⑧
⑱
-
⑨
⑲
CT3
(
+
)
⑨
⑲
RS485
E
⑩
⑳
CT3
(
-
)
Measured
current
input
⑩
⑳
The input voltage to each terminal is as follows.
Terminal Phase
and
wire
Terminal Input
voltage
Operating
power supply
Single-phase,
two-wire
②-③
100-240VAC (100 - 240V
~
)
(Line voltage)
Single-phase,
two-wire
⑪-⑫
0-440VAC ( 0-440V
~
)
(Line voltage)
Single-phase,
three-wire
⑪-⑫-⑬
0-220VAC ( 0-220V
~:
3W) (Phase voltage)
Three-phase,
three-wire
⑪-⑫-⑬
0-440VAC ( 0-440V 3
~
)
(Line voltage)
Measured
voltage input
Three-phase,
four-wire
⑪-⑫-⑬-⑭
0-254VAC ( 0-254V 3N
~
)
(Phase voltage)
◆
How to wire the current input terminals
・
CT has polarity. Wire correctly according to the using CT from power side (K) to load side (L), or it
can’t measure correctly.
・
If there is some distortion by harmonic or waveform, it may not measure correctly.
Please check with the actual system before adopts it.
・
Use the applicable wire. There might be occurred the malfunction, damage or electrical shock.
Caution for Wiring
1) Terminal fastening torque should be
0.6 to 1.0N
・
m
.
2) This has no built-in power switch, circuit breaker for power supply part. To protect the device, it is
necessary to install power switch and circuit breaker in the power supply circuit.
And this has no built-in power switch, circuit breaker or fuse for measured voltage input parts.
Therefore it is necessary to install them in the circuit near this unit.
3) The terminal block of KW8M is designed to be wired from left. Insert wires to the terminal from the
left and fasten with terminal screws.
4) In case using insulation sleeve, use an insulation sleeve applicable to M3 screw. Fastening torque
should be 0.6 to 1.0N
・
m. (Refer to the below.)
5) We recommend the wire with the cross-sectional 0.75 to 1.25mm
2
for the power supply terminals and
measured voltage input terminals.