12.2 Basic Specifications
178
12.2 Basic Specifications
Input specifications
Number of
channels
Voltage: 3 channels, Current: 3 channels
Measurement
line type
Single-phase 2-wire (1P2W, 1P2W × 2 circuits,1P2W × 3 circuits)
Single-phase 3-wire (1P3W, 1P3W1U)
Three-phase 3-wire (3P3W2M, 3P3W3M)
Three-phase 4-wire (3P4W)
Current only
Measurement
line Fre-
quency
50/60 Hz
Input
methods
Voltage: Isolated input (U1, U2, U3, and N: channels not isolated)
Current: Insulated clamp sensors
Input
resistance
(50/60 Hz)
Voltage input section: 3.0 M± 20%
Maximum
rated voltage
between
terminals
Voltage input section: 1000 VAC, 1400 Vpeak
Current input section: 1.7 VAC, 2.4 Vpeak
Maximum
rated voltage
to earth
Voltage input section: 600 V, Measurement Categories III
(anticipated transient overvoltage 6000 V)
300 V Measurement Categories IV
(anticipated transient overvoltage 6000 V)
Current input section: Depends on cl
amp senso
r in use.
Measurement specifications
Measurement
method
Digital sampling, zero-cross synchronized calculation method
Sampling
10.24 kHz (50 Hz: 10 cycles; 60 Hz: 12 cycles; 2,048 points)
Simultaneous sampling of voltage and current; inter-channel multi-
plexing at 61.44 kHz
Third channel during 3P3W2M measurement is calculated using
vector computation.
Calculation
processing
50 Hz: Continuous, gapless measurement at 10 cycles
60 Hz: Continuous, gapless measurement at 12 cycles
A/D converter
resolution
16 bit
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