Intelligent Single-Phase Carrier Energy Efficiency Terminal

• Customization: Available
• After-sales Service: Two Years
• Warranty: Two Years
• Model NO.: LTU
• Display: Digital
• Installation: Direct Connected
• Usage: Multi-Functional Energy Meter, Meter for Industry and Home Use, Prepayment Meter
• Electric Equipment: Three-phase Four-wire
• Theory: Electric Apparatus
• Measured Signal: Continuous Wave
• Type: Power Meter
• Certification: ISO
• Customized: Customized
• Trademark: Linkelec
• Origin: Made in China
• Production Capacity: 20000 Per Month

Product Description

Intelligent single-phase carrier energy efficiency terminal

1.Product Introduction
The intelligent single-phase carrier energy efficiency terminal is mainly used for installation in the comprehensive distribution cabinet (JP cabinet) and cable branch box of distribution transformers, to monitor the operation status of low-voltage lines and indicate the fault status of the lines. The low-voltage branch monitoring unit is connected to the three-phase voltage and collects the three-phase current through a current transformer. The collected electrical signals and phase fault information are uploaded through power line carrier communication. RS485 can also be used for data upload or device control, suitable for power monitoring and fault detection of 400V lines. It can collect information such as operating current, voltage, and protection current of low-voltage lines, calculate active and reactive power of the lines, detect line faults and issue fault alarms, and achieve information management of low-voltage power grids.

 

2.Technical parameter

performance parameter		Performance index
accuracy class		Voltage: 0.2; Current: 0.2; Active power: ≤ 0.5%; Reactive power: 1%; Power factor: 0.5%; Apparent power: ≤ 1.0%; Electricity: 0.5%; Frequency: 0.02 Hz
display mode		light emitting diode
Connection mode		Three-phase four-wire/three-phase three-wire
input voltage	rated voltage	AC220
	frequency range	45~65HZ
	measuring range	10V~1.2Un
incoming current	rated current	100/200/400A
	Operating voltage range	AC/DC 85V~265V
working power supply	Power consumption	<=5VA
	Static power consumption of the whole machine	Not more than 3W,5VA
	Super capacitor	Power off for 1 minute.
Switch input	Input form	Dry node (internal DC12V)
Switch output	output form	Mechanical contact
	contact rating	AC250V/1A,DC30V/1A
communication interface	Interface form	RS485, carrier module
	protocol	Modbus,DLT645
environmental conditions	Ambient temperature and humidity	Reference temperature: 23ºC
		Reference humidity: 40%~60%
		Temperature range:-40 ~+70ºC
		Maximum temperature change rate: 1.0ºC/ min
		Relative humidity: 10 ~ 100%
		Maximum absolute humidity: 35g/m
	operational environment	There is no explosion danger, corrosive gas and conductive dust, serious mold and violent vibration shock source.
	storage temperature	-35ºC~80ºC
Clock accuracy		0.5S/ day

3.Selection specifications

functional module	serial number	Function point	Function point description	Intelligent single carrier energy efficiency terminal
				LTU
Real-time measurement	1	phase voltage	Phase voltage: Ua, Ub, Uc	√
	2	line voltage	Line voltage: Uab, Ubc, Uca	√
	3	Voltage sequence component	Voltage sequence components: U1, U2, U0	√
	4	phase current	Phase current: Ia, Ib, Ic	√
	5	Current sequence component	Current sequence components: I1, I2, I0	√
	6	active power	Active power: Pa, Pb, Pc, p.	√
	7	wattless power	Reactive power: Qa, Qb, Qc and Q.	√
	8	apparent power	Apparent power: Sa, Sb, Sc, s	√
	9	Power factor	Power factor: Pfa, Pfb, Pfc, Pf	√
	10	phase position	Voltage/current: ∠Ua, ∠Ub, ∠Uc, ∠Ia, ∠Ib, ∠Ic	√
	11	frequency	System frequency: f	√
Electricity measurement	12	Active power	Split-phase and combined-phase bidirectional active energy	√
	13	Reactive power	Split-phase and combined-phase bidirectional reactive power	√
	14	Apparent electric degree	Split-phase and close-phase are in electric energy.	√
Power quality	15	Harmonic content	The harmonic content of three-phase voltage and current is 2~31 times.	√
	16	Harmonic distortion rate	Total, odd and even harmonic distortion rate	√
	17	imbalance/ loss of balance	Unbalanced voltage and current	√
	18	Crest coefficient	Peak coefficient of three-phase voltage	√
	19	Telephone harmonic factor	Telephone harmonic factor THF	√
	20	K coefficient	K coefficient of three-phase current	√
	21	Frequency deviation	System frequency deviation	√
remote signalling	22	Drive in and out	It has the status of remote communication in and out.	√
	23	Over-limit alarm	Remote communication state with 8-level out-of-limit alarm	√
out-of-limit	24	Over-limit alarm	8-level over-limit alarm function, which can monitor power parameters and remote signal volume and generate an alarm when conditions are met.	√
incident record	25	SOE record	It has 64 SOE recording functions, including switch displacement, remote control, over-limit alarm, etc., and it is recorded with time scale.	√
	26	Maximum record	The maximum and minimum values of relevant parameters (voltage, current, active power, reactive power, apparent power, power factor, frequency and demand) can be counted in real time, and recorded with time scales.	√
clock	27	clock	Accurate clock with hardware	√
in-out	28	Switch input	1 passive node input	○
	29	Switch output	2-way relay output	○
communication interface	30	RS485 communication	Standard 2-way RS485 communication, supporting MODBUS-RTU protocol; DLT645 protocol, which supports online upgrade program through RS485 interface.	√
	31	Carrier communication	Support single-phase carrier module	√
	32	USB	Support USB flash drive upgrade program	√
Current transformer	33	Small current transformer	100/200/400A transformer	○
Note: "√" marks this function as standard, and "○" indicates that this function is optional.

4.Product perforation and installation diagram

5.About our service :                  
*  We could provide 7* 24-hour phone call after-sales service. 
*  We provide a 2-year guarantee time and will change the meter for you within 1 year if there's something wrong with the product. Except for natural disasters or man-made reasons.
*  Recommend the most advanced application technology and management model in the industry to customers, and provide customers with detailed solutions.

6.Delivery Diagram