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KM-N2

Global Power Monitor voor montage in schakelkasten

  • De oplossing voor ontwerp-, installatie- en werkingsvraagstukken
  • Maximaal vier circuits meten met één Power Monitor
  • Voor gebruik met universele stroomtransformators en in allerlei werkomgevingen
  • Groot, gemakkelijk af te lezen wit lcd-display voor betere zichtbaarheid
  • Uiterst nauwkeurige metingen conform IEC-klasse 0.5S (alleen Power Monitor)

Specificaties & bestelinfo

Ordering information

Power monitor

Applicable circuits and rated input voltage

Power supply voltage

Dimensions (W×H×D)

Communications

Order code

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:
100 to 277 VAC (L-N) or 173 to 480 VAC (L-L)
Three-phase, 4-wire:
100 to 277 VAC (L-N) or 173 to 480 VAC (L-L)

Same as measured circuits:

100 to 277 VAC (L-N)

173 to 480 VAC (L-L)

90 × 65 × 90 mm

RS-485 communications,
pulse output

KM-N2-FLK

Note: To use a commercially available current transformer, use a CT with a secondary current rating of 1 A or 5 A, and a rated load of at least 1.0 VA.

Connectable OMRON split-type Current Transformers (CTs)

Rated primary current

Rated secondary current

Order code

100 A

1 A

KM20-CTN100

250 A

KM20-CTN250

500 A

KM20-CTN500

Note: The CT cables connected to the CT have the following recommended characteristics:
- cross section 0.75 mm² = AWG18
- 2C (number of internal wires is two)
- 1 m long maximum.
The CT cables are not provided by Omron

Specifications

Ratings (Power monitor)

Item

KM-N2-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 consumption

7 VA max.

Input

Rated input voltages
(power supply 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 1 A or 5 A 1

Maximum CT secondary current

6 A

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

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

Item

KM20-CTN100

KM20-CTN250

KM20-CTN500

Rated primary current

100 A

250 A

500 A

Rated secondary current

1 A

1 A

1 A

Rated frequency

50/60 Hz

Insulation resistance

100 MΩ min. (at 500 VDC) (Between through hole and output lead)

Dielectric strength

2,000V AC 1min. (Between through hole and output lead)

Cable length

1 m

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)

Item

KM-N2-FLK

Measured items

Total power consumption (active, regenerative, and reactive), power (active and reactive), current, voltage, power factor, and frequency

Measurement specifications

Active power

0.5% (IEC 62053-22 class 0.5S) 2

Reactive power

2% (IEC 62053-23 class 2) 1

Sampling cycle

80 ms for 50 Hz and 66.7 ms for 60 Hz

Insulation resistance

  • Between all electrical circuits and the case: 20 MΩ min. (at 500 VDC)
  • Between all power supply and voltage inputs and all communications and pulse output terminals: 20 MΩ max. (at 500 VDC)

Dielectric strength

 

  • Between all electrical circuits and the case: 2,200 VAC for 1 min
  • Between all voltage and current inputs and all communications and pulse output terminals: 2,200 VAC for 1 min

Vibration resistance

Single amplitude: 0.1 mm, Acceleration: 15 m/s2, Frequency: 10 to 150 Hz, 10 sweeps for 8 min each along three axes

Shock resistance

150 m/s², 3 times each in 6 directions (up/down, left/right, forward/backward)

Indications and operation method

LED/LCD indications and operation buttons

Weight

Approx. 350 g (Power Monitor only)

Degree of protection

IP20

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.)

Communications 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

1,200 m

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)

90 × 90 × 65 mm (excluding protrusions)

Installation method

DIN Rail mounting

Accessories

Instruction Manual and Compliance Sheet


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.

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

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.

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

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