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Specifications
KW2M-A/X User's Manual
83
11.2 Measurement Specifications
Power measurement (for main unit and expansion unit)
Measured circuit number
Main unit
2-circuit of 1-system
(6-circuit of 1-system for 1P2W)
Expansion unit
2-circuit of 1-system
(6-circuit of 1-system for 1P2W)
Max. measured circuit number
8-circuit of 1-system (24-circuit of 1-system for 1P2W)
(3 Expansion units are connected to main unit.)
Measured data
AC sine
Phase/wire system
Single-phase two-wire (1P2W, max.3-circuit)
Single-phase three-wire (1P3W)
Three-phase three wire (3P3W)
Three-phase four-wire (3P4W)
(common)
Applicable power system
100V system, 200V system, 400V system
Measured frequency
50/60Hz
Sampling rate
Sampling
1.024MHz (approx.1.0
μs
)
Data update
100ms
22.5s for Harmonics (2
nd
to 31
st
except THD)
Voltage
Direct input voltage
1P2W
L-L
0-690V AC *0-300V AC for UL standard
1P3W
L-L
0-690V AC *0-300V AC for UL standard
L-N
0-350V AC *0-152V AC for UL standard
3P3W
L-L
0-690V AC *0-300V AC for UL standard
3P4W
L-N
0-690V AC *0-300V AC for UL standard
L-L
0-398V AC *0-173V AC for UL standard
Impedance
Min. 2M
Ω
(L-N; V1/V2/V3/Vn)
Resolution
0.01V
Power consumption Approx. 0.2VA (L-N; V1/V2/V3 - Vn)
Accuracy
±0.2%
*±0.5% for 2-phase of 1P3W, 3-1 voltage of 3P3W
and line voltage of 3P4W
Input voltage with
VT
Primary voltage *3
100 to 500000V
Secondary voltage *3
100 to 690V
Current
Input current (with
CT)
Primary current
Max. 65,535A
Secondary current 1A or 5A (set in setting mode)
Max. current
10A (200% of the rating)
Overload capacity
1000% of the rating for 3s
Resolution
0.001A
Power consumption Approx. 0.2VA (between K and L of CT)
Accuracy *1
±0.2% *2
*±0.5% for 2(N)-phase of 1P3W and 2(S)-phase of 3P3W.
Power
Accuracy *1
±0.5%
Active power
Class 0.5S (IEC 62053-22)
Reactive power
Class 2 (IEC 62053-23)
*1 Without error of current transformers (CT) and voltage transformers (VT)
*2 When the device measures a current that is more than 5% below the rating, the accuracy may vary by
0.5%.
*3 When no VT is used, set the primary and the secondary voltage to the same value.