Introduction
6
KW2M-A/X User's Manual
Chapter 2 Introduction
With the KW2M-A Eco-POWER METER, electrical power (voltage, current, etc.), power factor,
frequency, etc. are measured using AC voltage and AC current input via one of the following systems:
single-phase two-wire system, single-phase three-wire system, three-phase three-wire system or
three-phase four-wire system.
In addition, the KW2M-A measures harmonics and THD for power quality measurement.
By connecting the expansion unit to the main unit you can measure up to 8 circuits (up to 24 circuits of
single-phase 2-wire system). One unit can measure 2-circuits.
■
Eco-POWER METER is designed chiefly to manage and help save energy. It is neither intended
nor can it be legally used for billing.
2.1 Model number
Model name
Model number
KW2M-A Eco-POWER METER main unit
AKW263100A
KW2M-A Eco-POWER METER expansion unit
(power measurement)
AKW272100A
* It is not possible to take measurement with only the expansion unit. Every expansion unit must be
connected to a main unit.
2.2 Measurement specifications
Phase/Wire system
Single-phase two-wire
Single-phase three-wire
Three-phase three wire
Three-phase four-wire
(1P2W)
(1P3W)
(3P3W)
(3P4W)
(common)
Applicable power system
100V system, 200V system, 400V system
Measurement circuit
Main unit
1-system 2-circuit
(when measuring 1P2W: 1-system 6-circuit)
Expansion unit
1-system 2-circuit
(when measuring 1P2W: 1-system 6-circuit)
Input measurement voltage
0 to 690V AC *0 to 300V for UL61010-1
Input measurement current
1 to 65,535A
Applicable current sensor
Secondary side output: 1A or 5A
