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KM-N3-FLK

Power Monitor

KM-N3-FLK

Global Power Monitor for On-panel Installation

Item list of KM-N3-FLK

about this Product Family

Related Contents

  • Energy Conservation Support/Environment Measure Equipment

last update: October 03, 2016

Ratings (Power Monitor)

Model KM-N3-FLK
Applicable phase wiring methods Single-phase two-wire, single-phase three-wire, three-phase three-wire,
and three-phase four-wire
Number of measured circuits Single-phase two-wire: 4 circuits max., Single-phase three-wire or three-
phase three-wire: 2 circuits max.,
Three-phase four-wire: 1 circuit
Power supply voltage
(operating frequency)		 100 to 240 VAC (50/60 Hz)
Power supply allowable voltage range 85% to 110% of rated power supply voltage
Power consumption 7 VA max.
Input Rated input voltages Single-phase, 2-wire:100 to 277 VAC
Single-phase, 3-wire:100 to 240 VAC (L-N) or 200 to 480 VAC (L-L)
Three-phase, 3-wire: 173 to 480 VAC (L-L)
Three-phase, 4-wire: 100 to 277 VAC (L-N) or 173 to 480 VAC (L-L)
Allowable supply voltage range 85% to 115% of rated power supply voltage
Connectable CTs General-purpose CT with a rated secondary current of 1A or 5A *
Maximum CT secondary current 6A
Rated input frequency 50/60 Hz
Ambient operating temperature -25 to 55°C (with no condensation or icing)
Ambient operating humidity 25% to 85%
Storage temperature -25 to 85°C (with no condensation or icing)
Storage humidity 25% to 85%
Operating altitude 2,000 m max.
Installation environment Overvoltage category II, measurement category II, pollution degree 2
Electromagnetic environment Industrial electromagnetic environment (EN/IEC 61326-1 Table 2)
Compliant standards EN 61010-2-030, EN 61326-1, and UL 61010-1

* The KM-series CTs (the KM20-CTF or KM-NCT Series) cannot be used. Use general-purpose CTs with a secondary-side output of 1 A or 5 A.

Ratings (Connectable OMRON Split-type Current Transformers (CTs))

Model KM20-CTN100 KM20-CTN250 KM20-CTN500
Rated primary current 100A 250A 500A
Rated secondary current 1A 1A 1A
Rated frequency 50/60 Hz
Insulation resistance 100 MΩ min. (at 500 VDC)
(Between through hole and output lead)
Dielectric strength 2000V AC 1min. (Between through hole and output lead)
Cable length 1m
Through-hole 24 diameter 36 diameter
Weight Approx. 210 g Approx. 500 g
Operating temperature and humidity ranges -20 to 55 °C, 85% max. relative humidity (with no condensation)
Storage temperature and humidity ranges -30 to 90 °C, 85% max. relative humidity (with no condensation)

Performance (Power Monitor)

Model KM-N3-FLK
Measured items Total power consumption (active, regenerative, and reactive), power (active
and reactive), current, voltage, power factor, and frequency
Meas-
urement
specifi-
cations		 Active power 0.5% (IEC 62053-22 class 0.5S *
Reactive power 2% (IEC 62053-23 class 2) *
Sampling cycle 80 ms for 50 Hz and 66.7 ms for 60 Hz
Insulation resistance (1) Between all electrical circuits and the case: 20 MΩ min. (at 500 VDC)
(2) Between all power supply and voltage inputs and all communications and
pulse output terminals: 20 MΩ max. (at 500 VDC)
Dielectric strength (1) Between all electrical circuits and the case: 1,400 VAC for 1 min
(2) Between all voltage and current inputs and all communications and
pulse output terminals: 2,200 VAC for 1 min
Vibration resistance Single amplitude: 0.1mm, Acceleration: 15m/s2, Frequency: 10 to 150 Hz,
10 sweeps for 8 min each along three axes
Shock resistance 150m/s2, 3 times each in 6 directions (up/down, left/right, forward/
backward)
Indications and operation method LCD indications and operation buttons
Weight Approx. 350g (Power Monitor only)
Degree of protection Front: IP65, Rear case: IP20, Terminal: IP00
Pulse
output		 Number of outputs Number of outputs: 4 (photoMOS relay outputs)
Used for the total power consumption pulse output.
Output capacity 50 mA at 40 VDC
ON residual voltage: 1.5 V max. (for output current of 50 mA)
OFF leakage current: 0.1 mA max.
Output unit Output unit: 1, 10, 100, 1k, 5k, 10k, 50k, or 100k (wh)
Pulse ON time: 500 ms (Cannot be changed.)
Commu-
nications
interface		 Communications method RS-485 (2-wire half-duplex with start-stop synchronization)
Communications protocol Modbus (RTU): Binary. CompoWay/F: ASCII
Baud rate 1.2, 2.4, 4.8, 9.6, 19.2, or 38.4 kbps
Data length Data length: 7 or 8 bits
Stop bits: 1 or 2 bits
Vertical parity: Even, odd, or none
Maximum transmission
distance		 1,200m
Maximum number of
connected Power Monitors		 Modbus: 99, CompoWay/F: 31
If you measure more than one circuit with one Power Monitor, the number
of circuits is treated as the number of connected Power Monitors.
Dimensions (H×W×D) 96×96×64 mm (excluding protrusions)
Installation method On-panel installation
Accessories Instruction Manual and Compliance Sheet, Mounting adapter and waterproof packing

* The error of the CT or VT is not included. IEC 62053 is an international standard for power metering.

last update: October 03, 2016

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