REF542plus is a medium-voltage protection relay from ABB which combines the functionalities of:
- Measurement
- Monitoring
- Protection
- Control
- Communication
- Self diagnostics
into a single package.
Although parked under the Medium Voltage Power Products division of ABB, this device is actually also suitable to be used for high-voltage, low-voltage, and in some special cases, specifically just as a logic controller or a communication to SCADA device because of its exceptional flexibility and functionalities.
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