APM521 Multifunctional with Neutral Current measure (4 CTs)Instrument

Full electrical parameters measurement
Electrical energy statistics
Power quality analysis
Event recording
Four channel CT input to measure neutral current and provide residual current measurement.
Auto phase-check ready to monitor wiring issues.
DI/DO and AO modules
CE and UL certificates
Installation method flexible (Can be embedded or expanded to DIN RAIL)

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Product Detail

Certificate

FAQ

General

ACREL APM521 network power meter is designed according to IEC international standards, featuring full electrical quantity measurement, energy statistics, power quality analysis, event logging functions, and network communication capabilities. It is primarily used for comprehensive monitoring of power supply quality in power grids. This series of meters is equipped with DI/DO modules and AO modules that offer a wealth of functions, allowing for flexible implementation of full electrical quantity measurement and monitoring of switch statuses in electrical circuits.

Description of Model

Note:

1.K: Digital Input/Output, DI: Digital Input, DO: Digital Output, C: RS485 Communication, M: Analog Output, CE: Ethernet Communication, Log: Timed Recording, R: Rail Mounting.

2.When selecting functional modules, the instrument can support both embedded installation and din-rail installation. The R function is only optional when no functional modules are selected and guide rail installation is required.

List of Functions

Measuredparameters	Total electrical measurement
Measuredparameters	Four-quadrant energy、Four - quadrant reactive electric energy、Split phase electricity、Apparent energy、Multi-rate energy
Pulse output	Total active power, total reactive power electrical energy pulse output（Reactive energy pulses and clock pulses are switchable, with clock pulses as the default.）
Demand	Three-phase current, active power, reactive power, apparent power real-time demand and maximum demand (including timestamp), last month's maximum demand (including timestamp).
Extremevalue statistics	Current, line voltage, phase voltage, active power, reactive power and other electrical parameters extreme values of this month and last month (including time stamps)
Power quality	Unbalance of current, line voltage, phase voltage
	Voltage phase angle, current phase angle
	Total (odd, even) harmonic content of voltage and current
	Harmonic content of voltage and current (2-63 times)
	Voltage peak coefficient
	Telephone waveform factor
	Current K-factor
	Vector
	Voltage and current waveform
	Fundamental voltage ,current and power factor
	Voltage deviation, frequency deviation
	Positive - sequence voltage, negative - sequence voltage, zero - sequence voltage
	Positive - sequence current, negative - sequence current, zero - sequence current
Frozen electric energy	24 - hour frozen electric energy, 31 - day frozen electric energy, December frozen electric energy, regular - time frozen electric energy
Event logging	DIDO records, which can record the last 128 DID records
Alarm logging	The last 128 alarm records can be recorded
Communication	Modbus - RTU protocol, DL/T 645-2007 statute
Optional features	4-channel digital input and 2-channel digital output
	2 channels of analog output, 4-20mA
	Expand the second RS485 communication channel with Modbus - RTU protocol
	Expand Ethernet communication with the MODBUS-TCP protocol，FTP protocol

Datasheet

Item			Performance Parameters
Meament	Voltage	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
		Rated voltage （CPA）	3P3L	3P4L
			3x100V 3x380V 3x690V	3x57.7/100V 3x220/380V 3x400/690V
		Overload	1.2 times rating (continuous) 2 times the rating for 1 second
		Power consumption	<1VA
		Accuracy class	Error ±0.2%
	Current	Rated current	1A、5A（UL、CE）
		Rated current	0.015-0.075（6）A（Active energy） 3X1(6)A（Reactive energy）（CPA）
		Overload	1.2 times rating (continuous) 10 times the rating for 1 second
		Power consumption	<0.2VA
		Accuracy class	Error ±0.2%
	Power		Active, reactive, apparent power, error ±0.2%
	Grid frequency		UL、CE	50Hz/60Hz, error ±0.2%
	Response rate		≤200ms (voltage, current, power)
			≤1s (electrical energy)
	Measurement category		66ULN(＋20%) 115ULL(＋20%) CATⅢ 230ULN(＋20%) 400ULL(＋20%) CATⅢ 277ULN(＋20%) 480ULL(＋20%) CATⅢ 400ULN(＋20%) 690ULL(＋20%) CATⅡ
	Electric energy		Active energy ：Class D（0.2S） Reactive energy (Class 2 accuracy)
Power supply	AC/DC 85-300V
	power consumption≤4W、10VA
Electromagnetic compatibility	Electrostatic discharge immunity class IV
	Electrical fast transient burst immunity class IV
	Surge (shock) immunity Class IV
Security	Power frequency withstand voltage		Between communication and signal input, AC4kV 1min
	Insulation resistance		Input and output terminals to casing >500MΩ
Communication	Interface and communication protocol		RS485 interface and Modbus RTU protocol
	Communication address range		Modbus RTU:1~ 247；
	Baud rate		Support 1200bps-38400bps
Environment	Operating temperature		-40℃～+70℃
	Storage temperature		-40℃～+80℃
	Relative humidity		≤95% (without condensation)
	Altitude		≤2000m
			≥2000m，≤5000mOnly applicable to the power supply with the voltage range of AC/DC 85-265V and the voltage below 277/480V.
	Installation environment		Indoor use（dry location）
	IP rating		IP54(Front panel),IP30(Body)
	Pollution degree		Class 2
	Overvoltage categories		OVC III
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

Dimension （Unit:mm Tolerance: ±1mm）

Dimension Diagram

Meter shape	Panel size		Shell size			Cut-out size
Meter shape	wide	high	wide	high	deep	wide	high
96 square shape	96	96	86.5	86.5	50	88	88
Optional Module	-	-	86	86	30.5	-	-
Din Rail	-	-	96	96	96	-	-

Installation dimension drawing for embedded installation of APM521（No module）

Installation dimension drawing for embedded installation

（No module）

Installation dimension drawing for embedded installation

（With module）

Wiring

Network

Installation

Package

	Package Dimension(1PC)	Package Weight(1 PC)
MINIMUM PACKAGE	170150130mm	0.78Kg
WHOLE BOX PACKAGE	Package Dimension(36 PCS)	Package Weight(36 PCS)
	540530480mm	15.2kG
PRODUCT HS CODE	9028301400