4
Each phase of UA, UB, and UC in the
Smart Power Sensor is connected with
a fuse and a thermistor to prevent
damage caused by external short
circuits. UA, UB, and UC do not need
external fuse protection.
Current
≤ 80 A
> 80 A
≥ 0 A
Line voltage
≤ 500 V
> 500 V
Connection
mode
Current and voltage
direct connection
Connection through
current transformers and
voltage direct connection
Connection through current
transformers and potential
transformers
Connection
setting
Direct connection:
SPEC = 1 (default)
Connection through transformers:
SPEC = 0
Current
transformation
ratio
CT = 1
(default)
CT = Ratio of the installed
current transformer
Potential
transformation
ratio
PT = 1.0
(default)
PT = Ratio of the installed
potential transformer
Wiring
mode
3P4W:
net = n.34
(default)
3P3W:
net = n.33
3P4W:
net = n.34
(default)
3P3W:
net = n.33
3P4W:
net = n.34
(default)
3P3W:
net = n.33
3.2
Wiring Scenarios
You need to set parameters after cable connections are complete. For details, see section 4
"Display and Parameter Settings".
