IV Techinical parameters

Communication interface

Meter-reading interface: 1 channel(RS485, maximum baud rate 9600bps)

Customerized interface: 1 channel(optional, RS485, maximum baud rate 9600bps)

Communication performance index

Ii. GPRS level: Class 2

iii. Antenna: 900MHz/1800MHz double-frequency specialized GSM antenna

iv. Antenna gain: 2dB double-frequency

v. RF power: class 4 (2W @ 900MHz)

vi. Class 1 (1W @ 1800MHz)

c. Measured technical index

i. Voltage measured accuracy(60%Un~120%Un): ≥0.5 

ii. Current measured accuracy(20%In~120%In): ≥0.5

iii. Power error: ≥1.0

d. Remote meter-reading 

i. Terminal meter is with RS485 meter-reading interface, which can read multi-functional meter's data and equipped with multiple meter communication protocol functions to realize remote communication with multiple national and international general meters. 

ii. Meter-reading data include real time data and historical data which can be determined by master-station such as voltage, current, power factor and electricity amount profile, etc.

iii. Meter-reading speed can be pre-set by master-station and terminal.

iv. Data-reading cycle: 15mins~24hours adjustable.  

e. Interface loop

i. Remote control: 2/4 loops

ii. Remote signalling: 4/8 loops

iii. Pulse: 2/4 loops 

iv. Gate contact: 1 loop      

f. Power requirements

i.  AC input: voltage AC 80%Un~120%Un / current AC 3*5A

ii. Power allowance: Considering terninal meter's external functions, power design remains enough allowance.

iii. Frequency: 50Hz±3%

iv. Backup power: Clock battery: 3.6V DC   capacity 1200mAh

                communication battery: 5V DC capacity 750mAh

v. Power consumption: static status<10VA

vi. Surge immunity: 4000V

vii.Power frequency magnetic field immunity: 4000V

g. Power off running index

i. power off data and clock can be saved for: 180days

ii. Main configuration parameters: 20 years(stored in FLASH)

h. Running environment:

i. Temperature: -25℃~+60℃

ii. Humidity: 5%~100%

iii. Atmospheric environment/pressure

iv. BBI index: 86kPa~108kPa(relative above sea level: lower than 2km)

vi. Dustproof and waterproof

vii. Comply with GB standard: IP51 index drop-proof test required in 4208

V Performance

EMC performance, mechanical performance and environmental influence complay with "State Grid Corporaton(2004) Power Load Monitoring System General Technical Conditions" and "DL/T 533-93 Wireless Load Control Bidirectional Terminal Technical Conditions".