Description
KM50 Series
Highly visible on-panel energy monitoring
KM50 can measure produced and consumed Power, Current and Voltage as well as leading reactive power, lagging reactive power, power factor, frequency amongst others.
- Assist energy saving analysis with built in energy classification functionality.
- High precision measurements even for currents below 5% of the nominal value through automatic range switchting.
- Able to mesure and distinguished consumed and generated power.
- Measurement of reactive power and power factor.
- Pulse measurement integrated and direct conversion to measure Energy Management KPI (f.i. n. of pcs / kWh).
- No VT required, direct voltage detection / openable CTs
- Multi-colored display
- Modbus communications
- Built-in data logging
Specifications & ordering info
KM50-E Smart power monitor
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Applicable circuits
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Power supply voltage (shared)
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Dimensions
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Communications
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Protocol
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Order code
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Single-phase, two wire: 100 to 480 VAC
Single-phase, three wire: 100/200 VAC
Three-phase, three wire: 100 to 480 VAC
Three-phase, four wire: 85 to 277 VAC
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100 to 240 VAC
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96 × 48 × 93 (H × W × D)
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RS-485
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CompoWay/F: 31 nodes,
Modbus: 99 nodes
(Both are supported by the same model.)
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KM50-E1-FLK
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CTs
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Rated primary current
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Rated secondary current
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Installation
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Order code
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5 A
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Special output
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Installed separately
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KM20-CTF-5A
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50 A
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KM20-CTF-50A
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100 A
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KM20-CTF-100A
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200 A
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KM20-CTF-200A
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400 A
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KM20-CTF-400A
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600 A
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KM20-CTF-600A
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Note: CT cables are not included with the CTs.
CT Cable
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Cable length
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Order code
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3 m
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KM20-CTF-CB3
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Note: Either use the CT Cable specified by OMRON or use 1.25-B3A crimp terminals and AWG22 wire from J.S.T. Mfg. Co., Ltd.
Specifications
Ratings
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Item
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KM50-E
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Applicable circuit
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Single-phase two wire, single-phase three wire, three-phase three wire and three-phase four wire power
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Rated power supply voltage
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100 to 240 VAC, 50/60 Hz
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Allowable supply voltage range
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85% to 110% of rated power supply voltage
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Allowable frequency range
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45 to 65 Hz
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Power consumption
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7 VA max.
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Rated input
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Rated input voltage
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100 to 480 VAC (single-phase, 2-wire): Line voltage
100/200 VAC (single-phase, 3-wire): Phase voltage/line voltage
100 to 480 VAC (3-phase, 3-wire): Line voltage
58 to 277 VAC (3-phase, 4-wire): Phase voltage
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Rated input current
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5 A, 50 A, 100 A, 200 A, 400 A, or 600 A (primary current of Special CT)
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Rated frequency
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50/60 Hz
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Rated input power
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With 5-A CT: 4 kW
With 100-A CT: 80 kW
With 400-A CT: 320 kW
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With 50-A CT: 40 kW
With 200-A CT: 160 kW
With 600-A CT: 480 kW
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Allowable input voltage
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110% of rated input voltage (continuous)
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Allowable input current
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120% of rated input current (continuous)
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Ambient operating temperature
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− 10 to 55°C (with no condensation or icing)
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Storage temperature
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− 25 to 65°C (with no condensation or icing)
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Ambient and storage operation humidity
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25% to 85%
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Installation environment
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Overvoltage category and measurement category: 2, Pollution level: 2
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Performance
Smart power monitor
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Item
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KM50-E
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Accuracy
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Voltage
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± 1.0% FS ± 1 digit (at ambient temperature of 23°C, rated input, and rated frequency).
However, the accuracy is ± 2.0% FS ± 1 digit for the Vtr line voltage for three-phase, three wire power and the Vrs line voltage for single-phase, three wire power under the same conditions.
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Current
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± 1.0% FS ± 1 digit (at ambient temperature of 23°C, rated input, and rated frequency).
However, the accuracy is ± 2.0% FS ± 1 digit for the phase-S current for three-phase, three wire power and the phase-N current for single-phase, three wire power under the same conditions.
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Active power
Reactive power
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± 2.0% FS ± 1 digit (at ambient temperature of 23°C, rated input, rated frequency, and a power factor of 1)
Reactive power formula: Reactive power = v × i × sin θ
“v” is the instantaneous voltage and “i” is the instantaneous current.
θ is the phase difference between the voltage and current.
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Frequency
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± 0.3 Hz ± 1 digit (at ambient temperature of 23°C, rated input, and rated frequency)
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Power factor
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± 5.0% FS ± 1 digit (at ambient temperature of 23°C, rated input, rated frequency, and power factor = 0.5 to 1 to 0.5)
Power factor formula: Power factor = Active power/Apparent power
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Temperature
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± 5°C two hours after the power is turned ON (after setting the offset to match the ambient environment)
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Communications
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Communications method
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RS-485 (two wire half-duplex)
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Sync method
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Start-stop
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Unit number setting
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CompoWay/F: 0 to 99, Modbus: 1 to 99
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Baud rate
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1.2, 2.4, 4.8, 9.6, 19.2, 38.4 kbps
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Transmission code
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CompoWay/F: ASCII, Modbus: Binary
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Data length
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7, 8 bits
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Stop bit length
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1, 2 bits
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Vertical parity
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Even, odd, or none
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Maximum transmission distance
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500 m
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Maximum number of connected Power Monitors
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CompoWay/F: 31, Modbus: 99
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CTs
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Item
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KM20-CTF-5A
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KM20-CTF-50A
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KM20-CTF-100A
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KM20-CTF-200A
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KM20-CTF-400A
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KM20-CTF-600A
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Rated primary current
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5 A
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50 A
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100 A
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200 A
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400 A
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600 A
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Secondary winding
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3,000 turns
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6,000 turns
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9,000 turns
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Application frequency
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10 Hz to 5 kHz
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Insulation resistance
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Between output terminal and external case: 50 M Ω min. (at 500 VDC)
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Dielectric strength
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Between output terminal and external case: 2,000 VAC for 1 min
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Protective element
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7.5 V clamp element
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Allowable number of connections/disconnections
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100 times
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Inner diameter
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10 dia.
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16 dia.
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24 dia.
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37 dia.
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Operating temperature and humidity range
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− 20 to 60°C 85% (with no condensation)
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Storage temperature and humidity range
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− 30 to 65°C 85% (with no condensation)
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