Controller RTU-300 is a family of data acquisition, processing, and communication units. There are three main variations RTU-300, RTU-310 and RTU-320. Each variation is based on an Remote Communications Server OS-9 platform and Windows NT operating system. The configuration software is simple and easy to use. The database and reporting tools are included as separate blocks and configurable on customer request.
The RTU differ in the controller types, capacity and the environment. Functional capabilities and capacity can be upgraded both, by means of replacing one RTU series with another, and by integrating of add-on modules into controllers. RTUs are designed for application at power utilities, industrial plants and other organizations which make independent mutual settlements with energy suppliers or consumers.
- RTU-300 is the most powerful VME standard unit. RTU-300 maintains multi-level operating performance, along with providing reliability and flexibility in communication. RTU-300 was designed for the special series of AMR single purpose devices.
- RTU-310 provides more functionality
than the RTU-320. The standard RTU-310 uses an IUC32 controller (PEP Co.
Germany). The communication possibilities include Profibus and a local
Ethernet network.
RTU-320 uses a Motorola 68302 microprocessor and operates in a Profibus network as a slave. It can also be used with RS-485 to connect ALPHA meters and Splitter with halvanically isolated current loop interfaces (MPR16). - RTU-300 family has been certified in Russia, Ukraine, Byelarus and Kazakhstan as a type of measurement instrumentation for commercial energy billing. These units are produced since 1999, and up to now over 500 units have been installed at industrial plants and power utilities.
Basic RTU application – high-accuracy time-of-use commercial energy consumption (delivery) metering (in multiple-rate conditions), real-time preset load technical billing and monitoring. Data is collected from meters type ALPHA and EuroALPHA (IRPS “current loop”, RS232, RS422/485) via digital channels.
The RTU has a box-type design, protection class IP 65, and a cabinet-type design, protection class IP 55, which allows to install these units either directly at the objects or in data collection centers.
Application of a liquid-crystal display (LCD) with 128 per 128 points resolution allows to easily take readings from meters (connected to RTU) and obtain data calculated based on such readings. Special-purpose software is used for selection of data displayed on LCD as well as for RTU configuring.
The RTU provides the following functions:
- Collection, processing, logging, storage and display of energy meter data on required and delivered active and reactive energy and power.
- Combining of measurements taken from meters into common group measurements corresponding to specific objects.
- Time-of-use energy metering taking account of time zones within a preset time interval.
- Demand interval measurement (one of the two intervals: 1, 3, 5 minutes and 15, 30 minutes).
- Searching for power maximum within preset time intervals.
- Archiving according to preset structure.
- Supporting the universal time system to provide synchronous measurements.
- Keeping track of 2 preset excess power limits.
- Measured energy display by meter indicator readings.
- Parallel data transmission from RTU via physical line or dialup or dedicated telephone channels (or other communications environment) to several data collection centers.
- Protection of measured data and IVK metrological characteristics against tampering and unauthorized modifications.
- Internal operability monitoring.
For direct connection to individual RTU and for RTU group data readout (for instance, in the event of communication line breakdown) it is possible to take RTU readings directly at the object using portable computer type NoteBook with the following data transmission to the higher-level computer. The RTU will automatically restore data lost as the result of a line breakdown between the meter and RTU. On the basis of RTU-300 it is possible to design the distributed, hierarchical metering systems. A wide range of communication interfaces allows to create flexible metering systems based on RTU-300 with their customization depending on the infrastructure of a specific enterprise.
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