Many utilities continue to respond to pressing requirements to replace existing SCADA remote terminal units, without initial consideration to move towards full substation automation installations.
Again, Callistonx is able to effectively respond to such retrofit requirements within a substation, and still maintain a smooth upgrade to a full substation automation system should the utility requirements develop.
Equally, with its small footprint, Callistonx intelligent remote terminal units are able to easily replace existing legacy RTUs that do not incorporate the range of system functions, intelligence and overall capabilities of Callistonx.
Whatever your remote terminal unit retrofit needs, Remsdaq is ready to respond with a Callistonx solution that incorporates an unsurpassed solution base to meet current and emerging system requirements.
Callistonx, in conjunction with its actuator controller interface provides an ideal solution for retrofitting legacy distribution switchgear as an alternative to switchgear replacement. Remsdaq is able to offer switch actuators that enable virtually any type of manually operated switch to be incorporated in a distribution automation system.
The identical Callistonx system facilities, as provided for the most sophisticated substation automation system are incorporated, so that the utility is able to benefit from the advanced protection and protection related applications, extensive metering and measurement capabilities, PILoTnxprogrammable logic, CaSEnx software configuration tool, Viewnx web browser and Touchnx local user interface to meet overall system demands.
There are four principle components within a SCADA system:
In a SCADA-type installation, the sensor (or transducer) collects and measures data from specific points of an installation (objects) and the systems making up the local installation. Within an electricity substation, sensors can collect and measure data including voltage, frequency, real power (kW) and apparent power (kVA) and power factor. The sensors can be analogue or digital. Analogue sensors can detect continuous changes at a given location. Digital sensors can measure discrete inputs and simple signals (e.g. On/Off).
An RTU (remote terminal unit) interfaces the sensors to the SCADA Master Station or Communications Network.
RTUs provide telemetry information and some local control facilities. They differ to Programmable Logic Controllers (PLCs). Both are microprocessor controlled electronic devices. Where they differ is that a PLC is typically used within a factory automation installation (for automated production lines, lighting or HVAC controls) where the PLC is programmed to monitor and control a specific system or component within the installation. An RTU is typically used within a wider geographic area to measure and collect data which is reported to a Master Station.
In addition to analogue and digital inputs, an RTU also has digital outputs which can be used to control various aspects of the installation objects.
A Master Station (also known as a Master Unit) is a supervisory computer system, Human Machine Interface (HMI) or software package. The computer system can consist of a single computer or multiple servers, distributed software applications and disaster recovery sites. The Master Station stores measurement information collected through the RTUs from the sensors and automatically regulates and controls the system.
Remsdaq RTUs can be used with several electricity supply network configurations:
Remsdaq Callisto RTUs are designed and manufactured in the UK and can be configured for a wide range of voltages and applications:
Remsdaq is pleased to assist utilities in deferring capital expenditure related to switchgear replacement and offer the best Callistonx solution to meet your application needs.