1. Product Introduction
NRCT-300 Three-Phase Power Quality Analyzer is a new generation of precision AC electric energy measuring instrument mainly used for calibration of three-phase energy meters and low-voltage test devices on-site and measurement of various AC parameters. It uses a 32-bit ARM and DSP processor a high-resolution color LCD display multiple 16-bit precision A/D converters a built-in high-precision wide-range current transformer and a variety of current clamps with wide measurement range and high accuracy.

2. Functions and features
(1) It is equipped with a 7-inch 800*480 dot matrix TFT true color LCD display a graphical operation interface which can be operated on a touch screen or by keys and the interface is clear and intuitive.
(2) Calibration method of electric energy meter: it can verify single / three-phase active and reactive electronic electric energy meters standard electric energy meters mechanical electric energy meters electromechanical integrated electric energy meters prepaid electric energy meters and multi-functional electric energy meters and measure the electric energy in four quadrants.
(3) Multiple wiring methods measurement: AC voltage current power (active power reactive power apparent power) can be measured under various wiring methods such as single-phase and three-phase Y/Δ;.
(4) Main and auxiliary electric energy meter verification: It can verify the active and reactive energy meters of the same line at the same time.
(5) Multi-parameter measurement: Measure AC voltage current power energy frequency phase power factor as well as measure voltage and current amplitude asymmetry and phase asymmetry waveform distortion and energy pulse constant of the tested meter.
(6) Data and graphic display: It can visually display the measurement working status and various measurement data. It can visually display the measured voltage and current waveforms voltage and current phase vector diagrams and harmonic component histograms.
(7) Realize the real-load measurement of the comprehensive error of the low-voltage electric energy metering device and the measurement of various parameters such as low-voltage CT transformation ratio and angle difference.
(8). Waveform display and harmonic analysis: It can display A B C three-phase voltage/current waveforms 2-31 harmonic content and harmonic amplitude and histogram display.
(9) Automatically judge the wiring error of the P3/P4 electric energy meter and point out the wrong wiring position display the secondary wiring diagram and power expression and calculate the correction coefficient.
(10) When the instrument is not connected to voltage and current signals the corresponding wiring results can be obtained by simulation based on the field data. The wiring simulation function can be used as a tool for training and checking to improve the checking skills of the field staff
(11) It can store 4000 sets of measurement data and harmonic data.
(12) Error curve record showing schematic diagram of error curve.
(13) Power demand measurement: interval type and slip type demand measurement.
(14) Power stability measurement: three power stability algorithms can be selected.
(15) Load curve record (trend record): select any 4 items among data items such as voltage/current/frequency/power/power factor for recording.
(16) Electric energy accumulation and running word test function.
(17) PT/CT setting can convert secondary data to primary data.
(18) Voltage and current unbalance calculation.
(19) Vector calculator on-site calculation of the vector sum of voltage and current.
(20) Recording and retrieval: the measurement interface can be recorded in real time and can be retrieved and consulted.
(21) The instrument is equipped with a USB interface and the measurement data can be directly exported via a U disk for management on the computer. The instrument data can be browsed edited and printed (A4 format) standard format test report backup and other functions by using the computer management software.
(22) The instrument is equipped with RS232/485 communication interface which can realize the real-time data transmission function online with the computer and read the electric energy data of the multifunctional electric energy meter (GB 645 protocol).
(24) Hand-held structure anti-dropping wrist dripping plastic buttons flame-retardant shell humanized design safer and more reliable on-site use.

Product Parameters
1. Reference working conditions

 

Parameter	Reference value or range	Allowable deviation
Temperature	23℃	±5℃
Humidity	(45-75) % RH	--
Working power	Built-in lithium battery power supply or PT measurement terminal power	--
External electromagnetic field interference	Should be avoided	--
Work location	The current wire to be tested is in the center of the jaws	--
Waveform of measured signal	Sine wave (distortion factor β) see note 1	β=0.01
Frequency of measured signal	50 Hz	±2 Hz
The amplitude range of the measured signal during phase frequency measurement	Voltage: 100V±25V Current: 5A±0.2A	--

2. Basic error limit

 

Voltage measure range			30V~ 480V	5A terminal	Active energy/ power	±0.05% ±0.1%
Voltage error			±0.05% ±0.1%		Reactive energy power	±0.1% ±0.2%
Current range (Overload 1 times)	Terminal		0.1~5A wide measure range		current	±0.05%
				5A clamp meter	Active energy power	±0.2%
	Clamp		5A 100A 500A 1000A		Reactive energy power	±0.5%
					Current	±0.2%
Input frequency range			45 ~ 55Hz		Over-load	200%
Frequency measure error			±0.01Hz		Active energy power	±0.2% ±0.5%
Phase measure range			0° ~ 360°	Large current clamp	Reactive energy power	±0.5%
Maximum phase error			±0.05°		Current	±0.5%
Harmonic wave measure range			2~21 times		Ratio test	±0.5%
Pulse constant		5A	1.8×107P/kWh	Others	Voltage influence	< ±0.01%
		100A	1.8×106P/kWh		Frequency influence	< ±0.01%
		500A	1.8×105P/kWh		Temperature influence	< ±PPM5℃
		1000A	1.8×1057P/kWh		Deviation in 24hours	< ±0.02%

3. Safety features

(1) Withstand voltage: the voltage and current input terminal the AC charging power input terminal and the instrument casing the clamp current transformer core and the lead wire and the clamp handle can withstand 1kV/50Hz sine wave AC voltage test for 1 minute.
(2) Insulation resistance: the insulation resistance between the test points mentioned above is greater than the measuring voltage of 100MΩ/1000V.

4. External dimensions and weight of the instrument

Host (including battery): 270×200×78mm weight: 2.15Kg
5A clamp-type current transformer: 160×45×25mm weight: 0.24Kg/piece
Whole machine size (including accessories): 423×336×126mm weight: 5.6 Kg/set
Packing size (including shockproof pad): 470×380×240mm weight: 7.0Kg/set

5. Conditions of use

Working environment: temperature: -15℃-+40℃ humidity: ≤ 90%RH
Storage environment: temperature: -30℃-+60℃ humidity: ≤ 95%RH
Altitude: <1500 meters
External electromagnetic field interference: should be avoided

6. Power supply

AC PT measuring terminal power supply: AC80V-480V power consumption 7.5VA
AC adapter power supply: AC220V/DC12V
DC lithium battery power supply: 7600mAh charging time> 8 hours charging times> 500 times.

7. Choice of clamp meter

SN	Name	Measurement range	Dimensions	Hollow inner hole
1	50A current clamp	5A - 100A	172×55×28mm	Ф14mm
2	100A current clamp	10A - 200A	172×55×28mm	Ф20mm
3	500A current clamp	50A - 500A	216×101×28mm	Ф50mm
4	1000A current clamp	100A - 1000A	270×115×36mm	52mmx80mm
5	2000A current clamp	200A - 2000A	313×115×36mm	52mmx125mm

 

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