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Bnext Energy Meter DIN

Bnext Energy // Energy Meter DIN 2

Electric consumptions sub-‐meter, it follows simultaneously 12 circuits. Integrated within the switch panel, it communicates in Modbus RTU (wired) or in Modbus over Zigbee (wireless).

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The BNE-‐WM1-‐12L sub-‐meter is able to follow 12 lines.

Single and three-‐phase lines can be mixed within the same device (ex : 6 lines dedicated to monitor 2 three-‐phase circuits, 6 other lines dedicated to single-‐phase circuits). Usages are so globally monitored with a single device. This device is integrated directly within the switch panel (DIN rail mounting). It offers two communication interfaces: ModBus RTU or ModBus over ZigBee.

It allows the measurement of all important data such as energy, voltage and current per phase, phase shift, the active power and apparent power per phase or total power.

It is non intrusive in the electrical installation of the building: the measurement of the current on each phase is done via split core current transformers.

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Application Fields:

• Monitoring of energy consumptions • Repartition of energy consumption • Measurement of renewable energy production

(e.g. PV, solar panels, wind, …)

Features:

• Single-‐phase, three-‐phase or multiplexed energy meter

• Indirect current measurement up to 2400A per phase (75A standard configuration)

• Correct operation indication via LED • Metering of active power, voltage and current

for each phase • Metering of the total active power • Modbus RTU or Modbus over Zigbee interface

for data retrieval

Bnext Energy Meter DIN Single phase and three phases ModBus energy sub-‐meter


Measurements and communication specifications. Installation example and wiring details.

Measurements:

The wattmeter is able to measure 12 single-‐phase lines simultaneously and is power supplied by an external 5V DC source. It is able to measure the following parameters:

Designation Description Vrms RMS voltage on each phase Irms RMS current on each phase F Frequency measurement (Phase A) KW Active power on each phase SumKW Three-‐phase active power (in case of three-‐phase installation) Fp Power factor on each phase KVAh Apparent energy on each phase SumKVAh Three-‐phase apparent energy (in case of three-‐phase installation) KWh Active energy on each phase SumKWh Three-‐phase active energy (in case of three-‐phase installation)

Communication:

• The wattmeter BNE-‐WM1-‐12L communicates through a half duplex RS-‐485 interface. Communication speed is set to 9600baud by default and can be changed. The communication protocol is Modbus RTU allowing up to 254 devices on a RS-‐485 link.

• The wattmeter BNE-‐WM1-‐12L_ZB behaves the same way as the BNE-‐WM1-‐12L, the only difference being that Modbus RTU frames are encapsulated within Zigbee frames and transmitted over the air. A Zigbee<-‐>Modbus gateway allows gathering wattmeter data, the Modbus master communicates with the wattmeter as if this latter was wired and using Modbus RTU protocol.

• Any USB / RS-‐485 converter and Modbus RTU software can be used to easily connect the wattmeter BNE-‐WM1-‐12L to a PC in order to configure it and communicate with it.

Vizualisation LEDs:

• 3 LEDS on the front cover enable a fast diagnosis of the wattmeter:

• Wattmeter state • Communication state • Measurement status

Electrical measurement types:

• The wattmeter BNE-‐WM1-‐12L features 4 main inputs that can be configured independently one from another. This enables an easy integration into an existing installation, as can be seen from the following figure:


Mounting: • The wattmeter BNE-‐WM1-‐12L comes in a DIN form factor box with 6UL length as per DIN 43880. • Physical characteristics :

• Closed polycarbonate box. Conform to WEEE/RoHS • Dimensions : 89.7mm x 107.6mm (6UL) x 62.2mm (Height)

Dimensions in mm:


Wiring Details:


Current Transformers:

• The wattmeter BNE-‐WM1-‐12L uses Current Transformers with integrated burden resistors that deliver up to 0.333Vac rms.

• The maximum allowable current depends on the actual Current Transformer used. • The Current Transformers available cover a range of maximum current from 5A to 2400A. • A current higher than the maximum allowable current may destroy the CT but will not impact the

wattmeter. • These CTs do not enable to measure DC current. • The wattmeter BNE-‐WM1-‐12L may not be used with other types of current transformers.

Current Transformers Specifications:

Type Voltage Output

Max output voltage 0.333Vac @ Imax (RMS value)

Phase shifth <2° @ 50% Imax

Cable length 1 m

Certification UL94V-‐0 norm


Technical Specifications

Bnext Energy Meter DIN

Technical Specifications

Precision +/-‐ 2% above 10% of full scale Three-‐phase voltage 3 × 230/400 VCA, 50 Hz

Tolerance -‐20 %/+15% Single-‐phase voltage 230 VCA, 50 Hz

Tolerance -‐20 %/+15% Reference current, max current (standard version)

Iref = 10 A, Imax = 65 A

Power supply 5V DC Measurement Indirect via current transformer Interfaces Modbus RTU Slave

ZigBee (2.4 GHz, Tx Power : 2mW, internal antenna) Mounting DIN Rail Dimensions Width = 108 mm, Height = 89,7 mm, Depth = 62,2 mm Insulation properties Equipment Protection Class II Operating temperature –10 °…+55 °C Storage temperature –30 °…+85 °C Current Transformers Calibers: 75 A to 2400 A

Precision : +/-‐1% between 10% et 120% of Imax, +/-‐2% below 10% of Imax Output: Voltage, max Voltage : 0.333Vac @ Imax (RMS value) Phase angle : <2° @ 50% of Imax Max cable length : 1m

Model A (mm) B (mm) C (mm) D (mm) E (mm) Diamètre (mm) 75 A 50 38 23 26 14.5 10 100 A 55 41 29.5 31 19 16 200 A 74.5 52 45 34 22 24 400 A 91 62 57 40.5 22 36


Bnext Energy

42 Avenue du Général de Croutte 31100 Toulouse http://www.bnextenergy.com

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