SIEMENS
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Siemens IC 10 · 2017
Relays
SIRIUS 3UG45, 3UG46 Monitoring Relays for Stand-Alone Installation
General data
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Overview
SIRIUS 3UG4 monitoring relay
The field-proven SIRIUS monitoring relays for electrical and
mechanical variables enable constant monitoring of all import-
ant characteristic quantities that provide information about the
functional capability of a plant. Both sudden disturbances and
gradual changes, which may indicate the need for maintenance,
are detected. Thanks to their relay outputs, the monitoring relays
permit direct disconnection of the affected system components
as well as alerting (e.g. by switching a warning lamp).
Thanks to adjustable delay times the monitoring relays can
respond very flexibly to brief faults such as voltage dips or load
changes. This avoids unnecessary alarms and disconnections
while enhancing plant availability.
The individual 3UG4 monitoring relays offer the following
functions in various combinations:
•
Undershooting and/or overshooting of liquid levels
•
Phase sequence
•
Phase failure, neutral conductor failure
•
Phase asymmetry
•
Undershooting and/or overshooting of limit values for voltage
•
Undershooting and/or overshooting of limit values for current
•
Undershooting and/or overshooting of limit values for power
factor
•
Monitoring of the active current or the apparent current
•
Monitoring of the residual current
•
Monitoring of the insulation resistance
•
Undershooting and/or overshooting of limit values for speed
Article No. scheme
Note:
The Article No. scheme shows an overview of product versions
for better understanding of the logic behind the article numbers.
For your orders, please use the article numbers quoted in the
selection and ordering data.
More information
Home page,
see www.siemens.com/relays
Industry Mall,
see www.siemens.com/product?3UG45
Conversion tool, e.g. from 3UG3 to 3UG4,
see www.siemens.com/sirius/conversion-tool
Product versions
Article number
Monitoring relays
3UG4
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@
–
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@
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0
Type of setting
e. g. 5 = analogically adjustable
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Functions
e.g. 11 = line monitoring
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Connection type
Screw terminals
1
Spring-type terminal
2
Contacts
e.g. A = 1 CO contact
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Supply voltage
e.g. N2 = 160 ... 260 V AC
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Example
3UG4
5
1
1
–
1
A
N
2
0
© Siemens AG 2016