smart electricity meter

The MC9600 smart meter is a product of Ningbo Qixunda Technology Co., Ltd. It is a multifunctional intelligent instrument with programmable measurement, display, digital communication, and power pulse transmission output. It can complete power measurement, power measurement, data display, acquisition, and transmission, and can be widely used in substation automation, distribution automation, intelligent buildings, and internal power measurement, management, and assessment of enterprises. The measurement accuracy is 0.5 level, realizing LED on-site display and remote RS-485 digital interface communication, using MODBUS-RTU communication protocol.

1. Insert the surface equipment into the surface holes of the distribution cabinet

2. Remove the surface, loosen the positioning screw, and remove the fixing clip

Note: L-N is an auxiliary power supply. Please wire it accurately according to the surface shell wiring diagram!

3. Measurement flash: The SX48-CV can measure power parameters in the power grid, including:

(1) Ua, Ub, Uc (phase voltage);

(2) Uab, Ubc, Uea (line voltage) Ia, Ib, Ic (current);

(3) Pa, Pb, Pc, Ps (active power per phase and total active power);

(4) Qa, Qb, Qc, Qs (reactive power per phase and total reactive power);

(5) PFs (total power factor);

(6) Ss (total apparent power);

FR (frequency) and active (reactive) electrical energy, all measured electrical parameters are stored in the internal electrical information table on the surface, and these data can be accessed and collected through the digital communication interface on the surface.

4. Insert the fixing clip into the surface and fix the positioning screw Equipment method correction 1) On the fixed distribution cabinet, select a suitable local equipment hole with a standard opening The power instrumentation equipment features convenience, simple wiring, easy maintenance, small engineering quantity, programmable input parameters on site, and can complete network communication of industrial control computers And regarding surfaces of different types, their flashing content.

2、 Functional characteristics of power instruments:

The fault check field is used to check whether the content of the main device's admission message is available The master device can communicate with each slave device individually, or communicate with all slave devices through broadcast methods The Modbus protocol for power instruments performs network communication in a master-slave manner, with only one master device querying and other slave devices responding accordingly based on the data information provided by the master device during the query.

In the reply message from the device, the function code is the response to the function code in the query message, and the data segment contains the data collected from the device In the Modbus protocol, the message structure of host query and slave reply is shown in Figure 3.1 The function code in the query message informs the selected slave device of what function to implement, and the data segment contains additional information about the slave device's requirements for implementing that function. The fault checking domain provides a method for verifying the accuracy of message content from the device If a fault occurs, the function code will indicate that it is a fault response message, and the data segment contains the code describing this fault information.

3、 Technical indicators of power instruments:

Electric energy metering with power meters

Active energy: WH Pulse constant: 3200P/kWh

◆ Reactive Energy: VarH Pulse Constant: 3200P/kvarh Pulse Output (optional, note required) (After selecting pulse output, analog output cannot be selected) Optional 2-channel optocoupler isolation pulse output corresponding quantity can be set analog output (optional, note required) Measurement method

◆ Can choose 3-phase 3-wire or 3-phase 4-wire

PT ratio: 1 to 5000

CT conversion ratio: 1-2000 flashes

LED/red, 3 rows, 4 Arabic numerals and letters per row

The flashing method can be set to manually/automatically scan the communication interface

◆ One communication port: RS485

MODBUS communication protocol (RTU method)

Baud rate: 2.4k/4.8k/9.6k/19.2k

◆ Address: 1-247

4、 Working principle of power instruments:

The MC9600 smart meter device type digital multifunctional power monitoring surface is a power surface that integrates measurement recording, large screen LCD flashing, and communication. It can measure the three-phase voltage, three-phase current, three-phase active power, three-phase reactive power, three-phase apparent power, three-phase power factor, and frequency of the power grid, and can also measure the total and phase separated reactive energy The RS485 communication interface supports DL/T645-2007 communication protocol The surface is suitable for power management systems, substation automation, distribution network automation, residential power monitoring, industrial automation, intelligent distribution panels and switchgear, including applications in power plants, hydropower stations and other electrical management automation systems Real time measurement: Record data on voltage, current, power, power factor, frequency, voltage and current imbalance rate, and record extreme values and occurrence times of voltage, current, and power;

Time division measurement of forward and reverse active power and four quadrant reactive power, and the combination of active and reactive power can be set arbitrarily; Time division measurement of large demand and occurrence time for forward and reverse active power and reactive power in four quadrants; Big 4 rate;

There are 14 time zones and 8 daily time slots throughout the year, with an additional 14 time slots per day. It supports automatic settlement for holidays and weekends (saving historical records before December); 2-channel switch input, 2-channel electromagnetic relay output;

2-channel pulse output of electrical energy (active and reactive); Abundant programmable alarm output (electromagnetic relay output); Support DL/T645-2007 protocol; The working parameters of power instruments can be programmed and set through buttons; The surface has 2 switch inputs and 2 switch outputs, which can perform local or remote switch signal monitoring and control output functions (i.e. remote signaling and control functions)