ABB REF542PLUS Switchgear Multifunction Protection and Switchgear Control Unit
ABB REF542PLUS Switchgear Multifunction Protection and Switchgear Control Unit
General
REF 542plus is a Switchgear Multifunction Protection and Switchgear Control Unit and it is the further development of the former REF 542 multifunctional unit. Like its predecessor, it features the following functions:
* Protection
* Measurement
* Control
* Monitoring and self diagnosis
* Communication
All above-mentioned and also power quality functions are integrated into a programmable environment. The exceptional flexibility and scalability of this new generation device lead to a smart solution where the traditional approach would be ineffective and expensive.
REF 542plus is composed of two parts: a base unit and a separate human machine interface (HMI). The base unit contains the power supply, the processor board, the analog input board and binary input and output (I/O) modules, as well as optional modules for supplementary functions. The base unit and a HMI are connected with a serial cable. The HMI is a stand-alone unit with its own power supply. It can be installed on the low voltage (LV) compartment door or in a dedicated compartment close to the central unit. The HMI can be used to set the protection parameters to locally operate the switching devices in the switchgear and to visualize events and measurements. A shielded, isolated twisted pair according to the RS-485 standard interface connects the HMI to the base unit.
The HMI is a complete system for the local management of the switchgear. The HMI allows the operator to set the protection functions, operate the primary objects, visualize measurements and events, reset alarms and change the unit working mode.
The HMI includes:
* Unit Ready LED
* Network Communication LED
* Alarm LED
* Interlocking Error LED
* Electronic Keys Sensor
* Object Control push buttons
* Menu Navigation push buttons
* Programmable LEDs
* PC interface
* Measurements Bars
* Text
* SLD view
* CB fast opening
* User defined command buttons
PC interface
The PC interface to be used to connect REF 542plus with the PC can be the infrared (IrDa) serial or TCP/IP port. By using an appropriate cable and Operating Tool, the following actions are possible: With the IrDa connection:
* Downloading a configuration into the unit
* Uploading the current configuration from the unit
* Uploading the fault recorder
* Uploading other information (measurements, binary inputs status, binary output status).
With Ethernet TCP/IP connections:
* Downloading a configuration into the unit
* Uploading the current configuration from the unit
* Downloading a new firmware of the mainboard into the unit
* Downloading a new firmware of the communication board into the unit
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