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APM521 Multifunctional Energy Meter with UL/CE Certificate


● din rail/ panal mounted
● UL/CE certificate
● Supports full electrical parameter measurement such as voltage, current, power, frequency and power factor
● Supports monitoring functions such as harmonics (2nd to 63rd harmonics monitoring), inter-harmonics, voltage fluctuations and flicker
● Modbus-TCP/RTU、Profinet protocol
● Optional DI/DO and AO

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Manual- APM521 Multifunctional Energy Meter UL- APM521




General



The APM521 network power meter (hereinafter referred to as the meter) is designed according to lECinternational stand ards, featuring full ele ctrical quantity measurement, energy statistics, power quality analysis, eventlogging functions, and network communication capabilities. it is primarily used for comprehensive monitoring of powelsupply quality in power grids. This series of meters is equipped with Dl/DO modules and AO modules that offer awealth of functions, allowing for flexible implementation of full electrical quantity measurement and monitoring ofswitch statuses in electrical circuits.




Function Descriptions

测量参数   Measured parameters 全电量测量 Total electrical measurement
  四象限电能、四象限无功电能、分相电能、视在电能、复费率电能 Four-quadrant energy、Four - quadrant reactive electric energy、Split phase electricity、Apparent energy、Multi-rate energy
脉冲输出 Pulse output 总有功、总无功电能脉冲输出 Total active power, total reactive power electrical energy pulse output
需量 Demand 三相电流、有功功率、无功功率、视在功率实时需量及最大需量(包含时间戳)，上月最大需量(包含时间戳) Three-phase current, active power, reactive power, apparent power real-time demand and maximum demand (including timestamp), last month's maximum demand (including timestamp).
极值统计 Extreme value statistics 电流、线电压、相电压、有功功率、无功功率等电参量本月极值和上月极值(包含时间戳) Current, line voltage, phase voltage, active power, reactive power and other electrical parameters extreme values of this month and last month (including time stamps)
电能质量 Power quality 电流、线电压、相电压不平衡度 Unbalance of current, line voltage, phase voltage
  电压相间角度、电流相间角度 Voltage phase angle, current phase angle
  电压电流总(奇、偶)谐波含量 Total (odd, even) harmonic content of voltage and current
  电压电流分次谐波(2-63次)含量 Harmonic content of voltage and current (2-63 times)
  电压波峰系数 Voltage peak coefficient
  电话波形因子 Telephone waveform factor
  电流K系数 Current K-factor
  矢量图 Vector
  电压、电流实时波形 Voltage and current waveform
  基波电压、基波电流、基波功率因素 Fundamental voltage ,current and power factor
  电压偏差、频率偏差 Voltage deviation, frequency deviation
  正序、负序、零序电压 Positive - sequence voltage, negative - sequence voltage, zero - sequence voltage
  正序、负序、零序电流 Positive - sequence current, negative - sequence current, zero - sequence current
冻结电能 Frozen electric energy 24时冻结电能、31日冻结电能、12月冻结电能、定时冻结电能 24 - hour frozen electric energy, 31 - day frozen electric energy, December frozen electric energy, regular - time frozen electric energy
事件记录 Event logging DIDO记录，可记录最近128条DIDO记录 DIDO records, which can record the last 128 DID records
报警记录 Alarm logging 可记录最近128条报警记录 The last 128 alarm records can be recorded
通讯 Communication Modbus - RTU协议、DL/T 645-2007规约 Modbus - RTU protocol, DL/T 645-2007 statute
选配功能 Optional features 4路开关量输入，2路开关量输出 4-channel digital input and 2-channel digital output
  2路模拟量输出，4-20mA 2 channels of analog output, 4-20mA
  扩展第二路RS485通讯,Modbus - RTU协议 Expand the second RS485 communication channel with Modbus - RTU protocol
  扩展以太网通讯，MODBUS-TCP协议，FTP协议 Expand Ethernet communication with the MODBUS-TCP protocol，FTP protocol

Technical Parameters

项目
Item

性能参数
Performance Parameters


电压
Voltage

额定电压

（UL、CE）
Rated voltage（UL、CE）

66VAC  L-N   115VAC  L-L

230VAC  L-N  400VAC  L-L

277VAC  L-N  480VAC  L-L

400VAC  L-N  690VAC  L-L



额定电压（CPA）
Rated voltage

（CPA）

三相三线

3P3L

三相四线

3P4L




3x100V

3x380V

3x690V

3x57.7/100V

3x220/380V

3x400/690V



过负荷
Overload

1.2 倍额定值（连续）
1.2 times rating (continuous)

2 倍额定值持续 1 秒

2 times the rating for 1 second



功耗
Power consumption

<1VA



精度等级
Accuracy class

误差±0.2%
Error ±0.2%


电流
Current

额定电流

（UL、CE）
Rated current（UL、CE）

1A、5A



额定电流

（CPA）
Rated current

（CPA）

0.015-0.075（6）A（有功电能Active energy）

3X1(6)A（无功电能Reactive energy）



过负荷
Overload

1.2 倍额定值（连续）
1.2 times rating (continuous)

10 倍额定值持续 1 秒
10 times the rating for 1 second



功耗
Power consumption

<0.2VA



精度等级
Accuracy class

误差±0.2%
Error ±0.2%


功率
Power

有功、无功、视在功率，误差±0.2%
Active, reactive, apparent power, error ±0.2%


电网频率
Grid frequency

UL、CE

50Hz/60Hz，误差±0.2%
50Hz/60Hz, error ±0.2%



CPA

50Hz，误差±0.2% 

50Hz，error ±0.2%


响应速率
Response rate

≤200ms（电压、电流、功率）
≤200ms (voltage, current, power)



≤1s（电能）
≤1s (electrical energy)


测量类别

Measurement category

66ULN(＋20%)   115ULL(＋20%) CATⅢ

230ULN(＋20%)  400ULL(＋20%) CATⅢ

277ULN(＋20%)  480ULL(＋20%) CATⅢ

400ULN(＋20%)  690ULL(＋20%) CATⅡ

计量
Metering

电能
Electric energy

有功电能：D级（0.2S）

Active energy ：Class D（0.2S）

无功电能（准确度等级2级）
Reactive energy (Class 2 accuracy)

辅助电源Auxiliary power supply

AC/DC 85-300V


功耗≤4W、10VA

power consumption≤4W、10VA

电磁兼容
electromagnetic compatibility

静电放电抗扰度 IV 级
Electrostatic discharge immunity class IV


电快速瞬变脉冲群抗扰度 IV 级
Electrical fast transient burst immunity class IV


浪涌(冲击)抗扰度 IV 级
Surge (shock) immunity Class IV

安全性
Security

工频耐压
Power frequency withstand voltage

通信与信号输入之间 AC4kV 1min
Between communication and signal input, AC4kV 1min


绝缘电阻
Insulation resistance

输入、输出端对机壳>500MΩ
Input and output terminals to casing >500MΩ

通信
Communication

接口与通信规约
Interface and communication protocol

RS485口、Modbus RTU规约
RS485 interface and Modbus RTU protocol


通信地址范围
Communication address range

Modbus RTU:1~ 247；


波特率
Baud rate

支持1200bps-38400bps
Support 1200bps-38400bps

环境
Environment

工作温度
Operating temperature

-40℃～+70℃


储存温度
Storage temperature

-40℃～+80℃


相对湿度
Relative humidity

≤95%（无凝露）
≤95% (without condensation)


海拔高度
Altitude

≤2000m



≥2000m，≤5000m（仅用于电源AC/DC85-265V，电压277/480V 以下）

≥2000m，≤5000mOnly applicable to the power supply with the voltage range of AC/DC 85-265V and the voltage below 277/480V.


安装环境

Installation environment

室内（干燥）

Indoor use（dry location）


防护等级

IP rating

IP54(前面板)，IP30(后壳)

IP54(Front panel),IP30(Body)


污染等级

Pollution degree

Class 2


过电压等级类别

Overvoltage categories

OVC III

参考标准

reference standard

UL

CAN/CSA C22.2 NO.61010-1-12

UL 61010-1

CSA C22.2 No.61010-2-030

UL 61010-2-030


IEC、CE

IEC 61010-1

IEC EN 61010-2-30


CPA

GB/T17215.321-2021

GB/T17215.323-2022

Installation

din rail mounted

panel mounted

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