Basic Info.

Model NO.	MQ21
Display	Color OLED
Installation	DIN Rail
Usage	Multi-Functional Energy Meter, Meter for Industry and Home Use, Standard Electric Energy Meter, Reactive Energy Meter, Maximum Demand Meter
Electric Equipment	Three-phase Four-wire
Theory	Electronic Meter
Power Meter Connection	Terminal
Measured Signal	Rogowski Coil, Voltage-Output Current Clamp
Type	Energy Meter
Certification	RoHS, ISO, CE
Customized	Customized
Application	Power Analysis/Energy Measure/ Event Data Record
Supported Current Sensor	Rogowski Coil, Voltage-Output Current Clamp
Storage	16GB Micro SD Card, USB Data Download
Primary Side Current Range	600A, 3000A, 6000A
Power Supply	Electricity From Major Loop, 90-528VAC
Connecting Terminal Type	SATA Interface, Terminals
ABC Voltage Measurement Accuracy	0.2%(5-528V AC)
Temperature	3 Channels(Optional)
Humidity	1 Channel
Frequency	0.01%(45-65Hz)
Communication	Modbus TCP & Modbus RTU
Harmonic	51 Times
Data Format	Csv
Optional 1	on-Line Power Quality Monitoring Platform
Optional 2	4G Edge Processing Gateway
Transport Package	Poly Bag and Stand Export Carton
Specification	139.55.6CM
Trademark	MEATROL
Origin	China
HS Code	9030331000
Production Capacity	50000PCS/Year

Product Description

Technical consultant

Christine

1 Product description

MQ21, the power quality analyzer externally connected with open type Rogowski coil or voltage CT, it can realize no dismantling wire test, facilitate engineering test, simplify test steps, save construction cost, and is also more convenient for the inspection and maintenance of distribution system. MQ21 supports systems of single-phase and three-phase: it can measure multiple electrical parameters such as voltage, current, harmonic, energy, power factor and active power on the power grid of phase A, B, C and phase N. With standard configuration of RJ45 and RS485 communication interfaces, through standard Modbus TCP and Modbus RTU protocols, it can be compatible with various configuration systems and transmit the electrical parameters collected by the front end to the system data center in real time.

Description
Model No.	MQ21
Type	Three phase power quality analyzer
Supported types of current sensor	Rogowski coil, Voltage-output current clamp
Wiring mode	3ф_WYE_4CT, 3ф_WYE_3CT, 3ф_DELTA_3CT,3ф_DELTA_2CT,1ф
Storage	16GB Micro SD card,USB data download (default storage interval: 1 minute)
Harmonic	51 times
Application	power analysis, energy measurement
Display screen	1.3-inch color OLED
Weight	Approx 400g
Dimension	LWD:139.55.6CM
Color	White
Input current
Primary side current range	600A 0.5A ~ 720A 3kA 0.5A ~ 3600A 6kA 0.5A ~ 7200A
Secondary side current range(ST08 current clamp or the same type)	1mA~10A
Input voltage value	1/225mV~707mV
Overload capacity	2V,10s/hours
Power supply
Electric source	Electricity from major loop, 90~528VAC
External battery	External 18650 lithium battery
Power consumption
Max power consumption	2.5W
Connecting terminal type
ABC phase current input	SATA interface
N-phase current input	5.08 terminal
Voltage input	7.62 spacing terminals
Power supply	Electricity from major loop, 90~528V

2 Function

Measurement
Voltage	UA,UB,UC,and average value
Current	IA,IB,IC,IN and average value
Power	Active power, reactive power, apparent power (each phase, sum value of three phases)
energy	Active energy, reactive energy, apparent energy(each phase, sum value of three phases) Exceeds 999.9GWh, energy value cleared to "0" automatically
Line voltage	Between phases
Angle between line voltages	Between phases
Angle between currents	Between phases
Power factor	Including harmonic power factor PF and fundamental power factor DPF(each phase, average value of three phases)
Max / Min.
Voltage	Each phase, average value of three phases
Current	Each phase, average value of three phases
Power	Active power, reactive power, apparent power(each phase, sum value of three phases)
Unbalance degree
Voltage	Each phase, the max unbalance degree of three phases
Current	Each phase, the max unbalance degree of three phases
Demand / Max Demand
Current	Each phase, average value of three phases
Power	Active power, reactive power, apparent power(each phase, sum value of three phases)
Temperature and humidity
Temperature	3 channels(optional)
Humidity	1 channel
Power quality
Voltage swell	Start time, end time, amplitude value
Voltage dip	Start time, end time, amplitude value
Voltage harmonic value and percentage	Total harmonic, 1, 2, 3, 4... 51 (51st) harmonics
Current harmonic value and percentage	Total harmonic, 1, 2, 3, 4... 51 (51st) harmonics

General data record
Record interval setting	5 ~ 9999s (default 60s)
Data format	CSV
Storage capacity	Micro SD card: 16GB
Storage capacity	Storage duration: 3 years (using 16GB SD card, once / 60s)
Recorded data	Basic data Voltage harmonic Current harmonic
Event data record
Data format	CSV
Recorded data	Event type Start time Duration Amplitude value Voltage RMS 1 / 2 value of each phase Voltage waveform of each phase

3 Accuracy and certification

Measurement accuracy
Rogowski coil	Current measurement accuracy	0.5%(1%~120% rated current) (<10A, accuracy not guaranteed)
	Current gear	600A(6A~720A): TRC-36 (50mV/kA@50Hz)
		3000A(10A~3600A): NRC-150 (85mV/kA@50Hz)
		6000A(20A~7200A): NRC-200 (50mV/kA@50Hz)
ST08 current clamp	Current measurement accuracy	0.5%(100mA~10A)
		1%(10mA~100mA), (<10mA, accuracy not guaranteed)
ABC Voltage measurement accuracy		0.2%(5~528V AC)
Power factor		±0.005
Active and apparent power		IEC62053-22 Class 0.5S
Reactive power		IEC62053-21 Class 2S
Frequency		0.01%(45~65Hz)
Active energy		IEC62053-22 Class 0.5S
Reactive energy		IEC62053-21 Class 2S
Environment condition
Operating temperature		-25ºC~+55ºC
Storage temperature		-40ºC~+85ºC
Humidity range		5~95% RH, 50ºC (non-condensing)
Pollution Level		2
Overvoltage capacity		III, applicable to the distribution system below 277/480VAC
Insulation strength		IEC61010-1
Altitude		3000m Max
Anti-pollution level		IP20(conforming to IEC 60629)
Products expiry		24 months
EMC(Electromagnetic compatibility)
Electrostatic discharge		Level IV(IEC61000-4-2)
Radiation Immunity		Level III (IEC61000-4-3)
EFT Electrical Fast Burst Immunity		Level IV (IEC61000-4-4)
Surge immunity		Level IV (IEC61000-4-5)
Immunity to Conducted Disturbance		Level III (IEC61000-4-6)
Power frequency magnetic field immunity		0.5mT (IEC61000-4-8)
Conduction and radiation		Class B (EN55022 )
Standard compliance
EN 62052-11, EN61557-12, EN 62053-21, EN 62053-22, EN 62053-23, EN 50470-1, EN 50470-3, EN 61010-1, EN 61010-2, EN 61010-031

4 Outline and dimensions

5 Port definition

MQ21 is equipped with abundant interfaces to realize different functions.

Port definitions as follows:

Interface No.	Interface name	Interface definition	Interface function	Remarks
1	A	RS485 A	RS485 Interface	RS485 Interface
2	B	RS485 B
3	G	RS485 GND
4	1	Digital input channel 1	Digital input interface	Dry contact input
5	2	Digital input channel 1
6	COM	Common terminal of digital input channel
7	COM	Digital output common terminal	Digital output interface	Digital output interface
8	NO	Digital output normally open terminal
9	NC	Digital output normally closed terminal
10	BAT-	3.7V rechargeable lithium battery -	External connecting 3.7V rechargeable lithium battery	Non rechargeable lithium battery is forbidden.
11	BAT+	3.7V rechargeable lithium battery +	External connecting 3.7V rechargeable lithium battery	Non rechargeable lithium battery is forbidden.
12				Reserve
13	T1-	Temperature sensor channel 1 input-	Temperature sensor channel 1 input	External K-type thermocouple
14	T1+	Temperature sensor channel 1 input+	Temperature sensor channel 1 input	External K-type thermocouple
15	T2-	Temperature sensor channel 2 Input-	Temperature sensor channel 2 Input	External K-type thermocouple
16	T2+	Temperature sensor channel 2 Input+	Temperature sensor channel 2 Input	External K-type thermocouple
17	T3-	Temperature sensor channel 3 input-	Temperature sensor channel 3 input	External K-type thermocouple
18	T3+	Temperature sensor channel 3 input+	Temperature sensor channel 3 input	External K-type thermocouple
19			Reserve	Reserve
20			Reserve	Reserve
21	IN+	Phase N current input+	Phase N current input channel	The phase N current can be connected to the sensor separately.
22	IN-	Phase N current input-	Phase N current input channel
23	UN	Phase N voltage input	Voltage input channel	Voltage input channel
24	UC	Phase C voltage input
25	UB	Phase B voltage input
26	UA	Phase A voltage input
RJ45	RJ45	Ethernet interface	Ethernet interface	Ethernet interface
IABCN	IABCN	ABCN current input	ABCN current input	SATA interface N-phase current can be connected to this port or (IN+,IN-)

5.1 Power supply

MQ21 is powered directly through ABCN voltage channel. The power supply voltage range: 90~528VAC, 45~60Hz, Mam power consumption 2.5W.

Do not connect the analyzer when the cable is live;
Before connecting the power supply, be sure to confirm whether the power supply voltage is within the required range, otherwise the analyzer cannot work normally.

5.2 Voltage current input

The analyzer supports 5 wiring modes: 3ф_WYE_4CT, 3ф_WYE_3CT, 3ф_DELTA_3CT, 3ф_DELTA_2CT, Single phase.

The actual wiring mode of the analyzer must be consistent with the one configured inside the analyzer.
3ф_WYE_4CT need 4pcs current sensor, and N-phase current can be measured.
3ф_WYE_3CT need 3pcs current sensor, N-phase current cannot be measured.
3ф_DELTA_3CT need 3pcs current sensor, phase B current is acquired by sensor actual measurement.
3ф_DELTA_2CT need 2pcs current sensor, phase B current is acquired by calculating.
The phase sequence of voltage and current must correspond one by one, otherwise the measured data of the analyzer is incorrect.
When using the current sensor, note that the direction of the current arrow on the sensor must be consistent with the actual current flow, that is, the sensor current arrow points to the load end.

For more information, please refer to MQ21 manual.