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11.2 Measurement Specifications
Power measurement (for main unit and expansion unit)
Measured circuit number
Max. measured circuit number
Measured data
Phase/wire system
Applicable power system
Measured frequency
Sampling rate
Direct input voltage
Impedance
Voltage
Resolution
Power consumption Approx. 0.2VA (L-N; V1/V2/V3 - Vn)
Accuracy
Input voltage with
VT
Input current (with
CT)
Max. current
Overload capacity
Current
Resolution
Power consumption Approx. 0.2VA (between K and L of CT)
Accuracy
Power
Accuracy
*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.
KW2M-A/X User's Manual
Main unit
Expansion unit
8-circuit of 1-system (24-circuit of 1-system for 1P2W)
(3 Expansion units are connected to main unit.)
AC sine
Single-phase two-wire (1P2W, max.3-circuit)
Single-phase three-wire (1P3W)
Three-phase three wire (3P3W)
Three-phase four-wire (3P4W)
100V system, 200V system, 400V system
50/60Hz
Sampling
Data update
1P2W
1P3W
3P3W
3P4W
Min. 2MΩ (L-N; V1/V2/V3/Vn)
0.01V
±0.2%
Primary voltage *3
Secondary voltage *3
Primary current
Secondary current 1A or 5A (set in setting mode)
10A (200% of the rating)
1000% of the rating for 3s
0.001A
±0.2%
*2
*1
*±0.5% for 2(N)-phase of 1P3W and 2(S)-phase of 3P3W.
±0.5%
*1
Active power
Reactive power
2-circuit of 1-system
(6-circuit of 1-system for 1P2W)
2-circuit of 1-system
(6-circuit of 1-system for 1P2W)
1.024MHz (approx.1.0μs)
100ms
22.5s for Harmonics (2
L-L
0-690V AC *0-300V AC for UL standard
L-L
0-690V AC *0-300V AC for UL standard
L-N
0-350V AC *0-152V AC for UL standard
L-L
0-690V AC *0-300V AC for UL standard
L-N
0-690V AC *0-300V AC for UL standard
L-L
0-398V AC *0-173V AC for UL standard
*±0.5% for 2-phase of 1P3W, 3-1 voltage of 3P3W
and line voltage of 3P4W
100 to 500000V
100 to 690V
Max. 65,535A
Class 0.5S (IEC 62053-22)
Class 2 (IEC 62053-23)
Specifications
(common)
nd
st
to 31
except THD)
83
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