Data sheet
3UG4618-1CR20
Digital monitoring relay for 3-phase voltage with N-conductor Autom. phase
sequence correction Phase failure 3 x 90 to 400 V 50 to 60 Hz AC
Undervoltage and overvoltage 90-400 V Hysteresis 1-20 V OFF delay 0-20
s Asymmetry 0-20% 1 CO for phase correction 1 CO for line supply faults
screw terminal
product brand name
SIRIUS
product designation
Network monitoring relay with digital setting
design of the product
5 functions
product type designation
3UG4
General technical data
product function
Phase monitoring relay
display version LED
No
design of the display
LCD
insulation voltage for overvoltage category III according to
IEC 60664
● with degree of pollution 3 rated value
degree of pollution
690 V
3
type of voltage
● for monitoring
AC
● of the control supply voltage
AC
surge voltage resistance rated value
6 kV
protection class IP
IP20
shock resistance according to IEC 60068-2-27
sinusoidal half-wave 15g / 11 ms
vibration resistance according to IEC 60068-2-6
1 ... 6 Hz: 15 mm, 6 ... 500 Hz: 2g
mechanical service life (switching cycles) typical
10 000 000
electrical endurance (switching cycles) at AC-15 at 230 V
typical
100 000
thermal current of the switching element with
contacts maximum
5A
reference code according to IEC 81346-2
K
relative repeat accuracy
1%
Substance Prohibitance (Date)
05/01/2012
Product Function
product function
● undervoltage detection
Yes
● overvoltage detection
Yes
● phase sequence recognition
Yes
● phase failure detection
Yes
● asymmetry detection
Yes
● overvoltage detection 3 phase
Yes
● undervoltage detection 3 phases
Yes
● voltage window recognition 3 phase
Yes
● adjustable open/closed-circuit current principle
No
● auto-RESET
Yes
Control circuit/ Control
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© Copyright Siemens
control supply voltage at AC
● at 50 Hz rated value
90 ... 400 V
● at 60 Hz rated value
90 ... 400 V
operating range factor control supply voltage rated
value at AC at 50 Hz
● initial value
1
● full-scale value
1
operating range factor control supply voltage rated
value at AC at 60 Hz
● initial value
1
● full-scale value
1
Measuring circuit
measurable voltage at AC
400 ... 90 V
adjustable response delay time
● with lower or upper limit violation
accuracy of digital display
0.1 ... 20 s
+/-1 digit
Precision
relative metering precision
5%
Auxiliary circuit
number of NC contacts delayed switching
0
number of NO contacts delayed switching
0
number of CO contacts delayed switching
2
operating frequency with 3RT2 contactor maximum
5 000 1/h
Main circuit
number of poles for main current circuit
3
ampacity of the output relay at AC-15
● at 250 V at 50/60 Hz
3A
● at 400 V at 50/60 Hz
3A
ampacity of the output relay at DC-13
● at 24 V
1A
● at 125 V
0.2 A
● at 250 V
0.1 A
operational current at 17 V minimum
5 mA
continuous current of the DIAZED fuse link of the
output relay
4A
Electromagnetic compatibility
conducted interference
● due to burst according to IEC 61000-4-4
2 kV
● due to conductor-earth surge according to IEC
61000-4-5
2 kV
● due to conductor-conductor surge according to IEC
61000-4-5
1 kV
field-based interference according to IEC 61000-4-3
10 V/m
electrostatic discharge according to IEC 61000-4-2
6 kV contact discharge / 8 kV air discharge
Galvanic isolation
galvanic isolation
● between input and output
Yes
● between the outputs
Yes
● between the voltage supply and other circuits
Yes
Connections/ Terminals
product component removable terminal for auxiliary
and control circuit
Yes
type of electrical connection
screw-type terminals
type of connectable conductor cross-sections
● solid
1x (0.5 ... 4 mm2), 2x (0.5 ... 2.5 mm2)
● finely stranded with core end processing
1x (0.5 ... 2.5 mm2), 2x (0.5 ... 1.5 mm2)
● at AWG cables solid
2x (20 ... 14)
● at AWG cables stranded
2x (20 ... 14)
connectable conductor cross-section
● solid
0.5 ... 4 mm²
● finely stranded with core end processing
0.5 ... 2.5 mm²
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AWG number as coded connectable conductor cross
section
● solid
20 ... 14
● stranded
20 ... 14
tightening torque with screw-type terminals
0.8 ... 1.2 N·m
Installation/ mounting/ dimensions
mounting position
any
fastening method
snap-on mounting
height
102 mm
width
22.5 mm
depth
91 mm
required spacing
● with side-by-side mounting
— forwards
0 mm
— backwards
0 mm
— upwards
0 mm
— downwards
0 mm
— at the side
0 mm
● for grounded parts
— forwards
0 mm
— backwards
0 mm
— upwards
0 mm
— at the side
0 mm
— downwards
0 mm
● for live parts
— forwards
0 mm
— backwards
0 mm
— upwards
0 mm
— downwards
0 mm
— at the side
0 mm
Ambient conditions
installation altitude at height above sea level maximum
2 000 m
ambient temperature
● during operation
-25 ... +60 °C
● during storage
-40 ... +85 °C
● during transport
-40 ... +85 °C
Certificates/ approvals
General Product Approval
EMC
Declaration of
Conformity
other
Railway
Confirmation
Test Certificates
Type Test Certificates/Test Report
Marine / Shipping
Special Test Certificate
Confirmation
Vibration and Shock
Further information
Information- and Downloadcenter (Catalogs, Brochures,…)
https://www.siemens.com/ic10
Industry Mall (Online ordering system)
https://mall.industry.siemens.com/mall/en/en/Catalog/product?mlfb=3UG4618-1CR20
Cax online generator
http://support.automation.siemens.com/WW/CAXorder/default.aspx?lang=en&mlfb=3UG4618-1CR20
3UG46181CR20
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© Copyright Siemens
Service&Support (Manuals, Certificates, Characteristics, FAQs,...)
https://support.industry.siemens.com/cs/ww/en/ps/3UG4618-1CR20
Image database (product images, 2D dimension drawings, 3D models, device circuit diagrams, EPLAN macros, ...)
http://www.automation.siemens.com/bilddb/cax_de.aspx?mlfb=3UG4618-1CR20&lang=en
Characteristic: Derating
https://support.industry.siemens.com/cs/ww/en/ps/3UG4618-1CR20/manual
last modified:
3UG46181CR20
Page 4/4
12/21/2020
7/4/2022
Subject to change without notice
© Copyright Siemens
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