Distribution Transformer Monitoring RTU
SN-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.
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 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
The capacity of Flash memory can be extended to 32MB. The data can be stored for more than 10 years after power off.
Current measurement: class 0.5
Voltage measurement: class 0.5
Active energy measurement: class 1
Reactive energy measurement: class 2
Spare battery for clock: 3.0V/960mAh,with more than 10 years service life
Working Voltage: rated voltage, ±30%
Spare battery used when power off: 3.6V/600 mAh, rechargeable nickel hydride battery
Working temperature: -25ºC +75ºC
Storage temperature: -40ºC80ºC