3UG4.1 line monitoring relay
6
Overview
The electronic line monitoring relays permit maximum protection for mobile machines and
plants or in unstable power systems. Using the monitoring relays, line and voltage errors can be
detected early and minimized.
Depending on the version, the electronic line monitoring relays monitor the following:
• Phase sequence
• Phase failure with and without neutral conductor monitoring
• Phase asymmetry
• Undervoltage and/or overvoltage
SIRIUS 3UG4 / 3RR2 monitoring relay
Equipment Manual, 07/2021, NEB927043002000/RS-AD/005 81
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