Introduction
1
Purpose of the manual
This manual describes the 3UG4 monitoring relays for stand-alone assembly and the 3RR2
current monitoring relays for mounting on 3RT2 contactors
The manual provides overview information for integrating the monitoring relays into the system
environment, and it describes the hardware and software components of the devices.
The information in this manual enables you to commission the monitoring relays.
Required basic knowledge
To understand these operating instructions you should have a general knowledge of automation
engineering and low-voltage switchgear.
Scope of the manual
The manual is valid for these monitoring relays. It contains a description of the devices that is
valid at the time of publication.
SIRIUS 3UG4 / 3RR2 monitoring relay
Equipment Manual, 07/2021, NEB927043002000/RS-AD/005 9
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