KW8M Eco-POWER METER (1A/5ACT input type)
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8.2 Input Specifications
8.2.1 Electric power input
Phase and wire system
Single-phase two-wire system
Single-phase three-wire system
Three-phase three-wire system
Three-phase four-wire system
(common)
Rating
Single-phase two-wire :
Single-phase three-wire :
Three-phase three-wire :
Three-phase four-wire :
0 -440V AC (Line voltage)
0 -220V AC (Phase voltage)
0 -440V AC (Line voltage)
0 -254V AC (Phase voltage)
Up to 120% of rated input voltage
Allowable measurement
voltage
Single-phase two-wire :
Single-phase three-wire :
Three-phase three-wire :
Three-phase four-wire :
0-528V AC (Line voltage)
0-264V AC (Phase voltage)
0-528V AC (Line voltage)
0-300V AC (Phase voltage)
Input
voltage
VT ratio
1.00 to 99.99 (Set with setting mode)
*Voltage transformer (VT) is required when you measure a load
with voltage over 440V system.
(Secondary voltage rating of a VT is 110V.)
Measured current
(Primary side current of CT)
1 to 4000A (Set with setting mode)
*Use CT with secondary side current 1A or 5A.
Rated input current
(Secondary side current of CT)
1A or 5A (Select with setting mode)
Allowable measured current 120% of rated input current
Input
current
Current overload capacity
1000% of rated input current 3 sec.
Cut-off current
1.0 to 50.0%F.S
Cut-off voltage
Under 5% of rated voltage (Fixed)
(Under the value calculated by rated voltage x 0.05 x VT ratio)
Special
functions
Current threshold for
hour meter
1.0 to 100.0
%
F.S.
Instantaneous electric power
(active/ apparent)
Integral electric power
(active/ apparent)
Voltage
Current
Electricity charge
±
(1.0% F.S.+1digit)
(at 20
℃
, rated input, rated frequency, power-factor 1)
*Accuracy coverage
:
5 to 100% of rated current
Instantaneous electric power
(reactive)
Integral electric power
(reactive)
±
(2.0% F.S.+1digit)
(at 20
℃
, rated input, rated frequency, power-factor 1)
Hour meter
±
(0.01
%
+1digit) (at 20
℃
)
In case power on start or current energizing
±
(0.01
%
+1s
±
1 digit)
Temperature
characteristics
±
(1.0% F.S. /10
℃
+1digit)
(Range of -10 to 50
℃
, rated input, power-factor 1)
Accuracy
(without error
in CT and VT)
Frequency characteristics
±
(1.0% F.S.+1 digit)
(Frequency change
±
5% based on rated frequency, rated input,
power-factor 1)