Ethernet Modbus TCP multifunctional power meter

1、 Overview

APM5 seriesEthernet Modbus TCP multifunctional power meterIt has functions such as full power measurement, power statistics, power quality analysis (including harmonics, interharmonics, flicker), fault waveform recording (including voltage rise and fall interruption, impulse current recording, etc.), event recording, and network communication. It is mainly used for comprehensive monitoring of power supply quality in the power grid. This series of instruments is equipped with feature rich DI/DO modules, AO modules, wireless communication modules, and leakage temperature measurement modules, which can flexibly achieve full power measurement and switch status monitoring of electrical circuits.

The ammeter and voltmeter used in the distribution cabinet are installed in an embedded manner. Real time detection and display of multiple electrical parameters such as three-phase voltage, three-phase current, active power, frequency, and kilowatt hour, with local display function. The detected data can be uploaded to the upper computer monitoring center through the built-in RS485 interface when needed. Equipped with RS-485 interface and MODBUS communication protocol.

2、 Product model, specifications, and functions

Note:Embedded Ethernet electric meterWhen using 5A/1.25mA as the secondary mutual inductance method for connection, the instrument's built-in secondary side transformer should be kept at a distance from the on-site primary side transformer to avoid interference from the outgoing line.

3、 Model Function

Measurement parameters: full energy measurement, four quadrant energy, phase separated energy, apparent energy, and multi rate energy

Pulse output: Total active and reactive power pulse output (72 only active power pulses)

Demand: three-phase current, active power, reactive power, apparent power, real-time demand, and extreme demand (including timestamp)

Extreme value statistics: current, line voltage, phase voltage, active power, reactive power and other electrical parameters, extreme values of this month and the previous month (including timestamp)

Power Quality: Current, Line Voltage, Phase Voltage Imbalance, Voltage Phase Angle, Current Phase Angle, Total (Odd, Even) Harmonic Content of Voltage and Current, Sub harmonic Content of Voltage and Current (2-63rd Order), Interharmonics (included when S is selected), Flicker (included when S is selected), Voltage Peak Coefficient, Telephone Waveform Factor, Current K Coefficient, Vector Graph Voltage and Current Real time Waveforms, Fundamental Voltage and Fundamental Current

Fault recording: voltage temporary rise and fall interruption, surge current, etc. (included with S option)

Event record: DIDO record, can record the last 128 DIDO records

Alarm record: can record the latest 128 alarm records

Communication: Modbus RTU protocol, DL/T 645-2007 protocol, Ethernet communication/MODBUS-TCP

Switch quantity: 72 Appearance: 2 switch quantity inputs+2 switch quantity outputs; 96 appearance: 4-channel switch input+2-channel switch output

Four,Appearance and installation dimensions

Ethernet Modbus TCP multifunctional power meterAnd the size of the disk opening (unit: mm)

Figure 2 APM520 Dimensional Diagram

Note: If instruments are installed side by side on a unified horizontal plane, it is recommended to have instrument openings spaced 30mm apart.

Voltage input:

The input voltage should not exceed 120% of the rated input voltage of the product (100V or 110V or 400V or 690V), otherwise PT should be used; a 1A fuse must be installed at the voltage input end; The wiring method of the product needs to be set according to the PT wiring method of the product

Current input:

The rated input current is 1A or 5A, and an external CT is required (it is recommended to use a wiring harness instead of directly connecting to the CT for ease of disassembly and assembly); Ensure that the input current corresponds to the voltage, the phase sequence is consistent, and the direction is consistent; If other instruments are connected to the CT circuit used, the wiring should be connected in series; Before removing the current input connection of the product, be sure to disconnect the CT primary circuit or short-circuit the secondary circuit first!

Communication wiring:

The instrument provides asynchronous half duplex RS485 communication interface, using MODBUS-RTU protocol, and various data information can be transmitted on the communication line. It is recommended to use shielded twisted pair cables for communication connections, with a cross-sectional area of no less than 0.5mm2 per core. When wiring, communication lines should be kept away from strong electrical cables or other strong electric field environments.