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Address
No. 253 Yulu Road, Jiading District, Shanghai
Ankerui Electric Co., Ltd
No. 253 Yulu Road, Jiading District, Shanghai
The APM521 multifunctional instrument is designed according to UL/IEC standards and integrates power parameter measurement, power quality analysis, alarm, and I/O functions; Large LCD display, supporting both Chinese and English display, easy and fast operation settings, supporting multiple communication protocols. Widely used in industry and various key power applications, monitoring the operational efficiency of distribution equipment.

1、 Functional Features
Measurement parameters: full charge measurement; Four quadrant electrical energy, four quadrant reactive energy, phase separated electrical energy, apparent electrical energy, and multi rate electrical energy
Pulse output: Total active and reactive power pulse output (reactive power pulse and clock pulse can be switched, default clock pulse)
Demand: Real time demand and maximum demand (including timestamp) for three-phase current, active power, reactive power, apparent power, and last month's maximum 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:
Imbalance of current, line voltage, and phase voltage
Voltage phase angle, current phase angle
Total (odd, even) harmonic content of voltage and current
Voltage and current harmonics (2-63rd order) content
Voltage peak coefficient
Telephone waveform factor
K factor
vector graphic
Real time waveform of voltage and current
Fundamental voltage, fundamental current, fundamental power factor
Voltage deviation, frequency deviation
Positive, negative, and zero sequence voltages
Positive, negative, and zero sequence currents
Freezing electric energy: freezing electric energy at 24:00, freezing electric energy on 31st, freezing electric energy in December, and freezing electric energy at regular intervals
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
Optional features:
4-channel switch input, 2-channel switch output
2-channel analog output, 4-20mA
Expand the second RS485 communication, Modbus RTU protocol
Extended Ethernet communication, MODBUS-TCP protocol, FTP protocol
2、 Application scenario diagram

3、 Installation diagram
Panel installation

rail-mounted installation

UL certified energy meter for phase sequence and phase angle monitoring
UL certified energy meter for phase sequence and phase angle monitoring