China Sn-P1 Distribution Transformer Monitoring RTU Energy Kwh Meter Watt Hour Meter

SN-P1Distribution Transformer Monitoring RTUGeneral DescriptionSN-Pl distribution transformer monitoring RTU adapts high performance 32-blt RISC hardware platform and high accuracy energy measurement technology. Combining with the advanced Ethernet technology, GSM/GPRS/CDMA mobile telecommunication technology,the RTU has the advantage of powerful functions,simple manipulation, stable operation and easy maintenance.
Functions
l RTU hardware module; The RTU is combined with main control module, measuring module, anti-tamper module,data communication unit module. The data communication is compatible with Ethernet module and GPRS/CDMA mobile communication module and support Hot-swap.
l Software design module: The software of the RTU adapts embedded module programming modes and each module operates separately to facilitate Increase or deletion of function modules.
l Reliable power Is used to avoid crash of data communication module.
l Electricity meters of different protocols can be connected to the RTU at one time.
l High accuracy sampling technology. SOC measuring chip is adapted to ensure accurate and reliable of the data.
l prompt report for the abnormal events.
l Large capacity Data Flash and embedded file management technology are adapted,the storage capacity can be extended to 32MByte to ensure safe storage for long history data.
l Automatic remote upgrade of application and communication protocol is supported to satisfy function extend In the future.
l Data compression and encryption technology are used to guarantee data security.
l Phase voltage,current ,power,power factor,maximum demand and harmonic content of voltage or current of each phase can be displayed.
l Multi-tariff energy measurement, bi-direction active energy measurement, four quadrant reactive energy
l measurement are supported and multi-tariff measurement for maximum demand Is supported as well.
l Reactive power over-compensation value and reactive power lack compensation value can be calculated.































Technical data and parameters
Communication Protocol: The RTU Is compatible with several types of protocols. Telecommunication Channel: The RTU supports many kinds of communication ways:
l GSM/GPRS/CDMA
l Ethernet
l PSTN
Interface configuration
l 2-way RS485 used In meter reading and RTU cascade (one way of RS485 can be changed to CS port)
l way RS23 2 port and 1-way Infrared port used In local maintenance ,parameters set and data measurement
l way door contact used for monitor illegal open of the door
l 4-way relay output
l 4-way remote switch and 2-way pulse Input
LCD Display: 128X64 lattice style large LCD with LED back light
Storage Capacity:
The capacity of Flash memory can be extended to 32MB. The data can be stored for more than 10 years after power off.
Accuracy:
Current measurement: class 0.5
Voltage measurement: class 0.5
Active energy measurement: class 1
Reactive energy measurement: class 2
Clock Error:≤0.5s/d
Spare battery for clock: 3.0V/960mAh,with more than 10 years service life
Working Power:
Working Voltage: rated voltage, ±30%
Working frequency:50Hz±5%
Spare battery used when power off: 3.6V/600 mAh, rechargeable nickel hydride battery
Working Environment:
Working temperature: -25ºC +75ºC
Storage temperature: -40ºC80ºC