KW8M Eco-POWER METER
7
◆
When measuring a load with exceed input voltage
Voltage transformer (VT) is needed when you measure a load with over rated input voltage (440V).
Use VT, those secondary rating is 110V.
Grounding the secondary side of VT and CT is not necessary with low-voltage circuit.
Single-phase two-wire system
Single-phase, three-wire
Back view
Back view
No.13,14,17
～
20 are not wired.
No.14, 19, 20 are not wired.
Three-phase, three-wire system
Three-phase, four-wire system
Back view
No.14, 19, 20 are not wired.
Back view
CT1
11
12
13
14
15
16
L N
VT
P1
P0
k
l
11
12
13
14
15
16
17
18
CT1
R N S
CT2
P1
P0
P2
k
l
k
l
VT
11
12
13
14
15
16
17
18
19
20
R S T N
P1
P0
P2
P3
VT
CT3
k
k
CT1
k
CT2
k
k
R S T
11
12
13
14
15
16
17
18
P1
P0
P2
CT1
CT2
VT
