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Siemens IC 10 · 2017
Overload Relays
SIRIUS 3RB2 Electronic Overload Relays
3RB20, 3RB21 for standard applications
7
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Technical specifications
The following technical information is intended to provide an
initial overview of the various types of device and functions.
1)
90 % for relay with current setting range 160 A to 630 A.
More information
Configuration Manual "Configuring SIRIUS Innovations – Selection Data for
Fuseless and Fused Load Feeders"
, see
Manual "SIRIUS – SIRIUS 3RU Thermal Overload Relays /
SIRIUS 3RB Electronic Overload Relays",
see
Technical specifications,
see
Type
3RB2056, 3RB2153
3RB2066, 3RB2163
Size
S6
S10/S12
Dimensions (W x H x D)
(overload relay with stand-alone installation
support)
mm
120 x 119 x 155
145 x 147 x 156
General data
Tripping in the event of
Overload, phase failure and phase asymmetry
+ ground fault (for 3RB21 only)
Trip class
acc. to IEC 60947-4-1
CLASS
3RB20: 10E or 20E;
3RB21: 5E, 10E, 20E and 30E adjustable
Phase failure sensitivity
Yes
Overload warning
No
Reset and recovery
• Reset options after tripping
3RB20: Manual and automatic RESET;
3RB21: Manual, Automatic and Remote RESET
• Recovery time
-
For automatic RESET
Approx. 3 min
-
For manual RESET
Immediately
-
For remote RESET
Immediately
Features
• Display of operating state on device
Yes, by means of switch position indicator slide
• TEST function
Yes, test of electronics by pressing the TEST button/ test of auxiliary contacts
and wiring of control circuit by actuating the switch position indicator slide/
self-monitoring
• RESET button
Yes
• STOP button
No
Protection and operation of explosion-proof motors
EC type-examination certificate number
according to directive 2014/34/EU (ATEX)
PTB 06 ATEX 3001
II (2) G [Ex e] [Ex d] [Ex px]
II (2) G [Ex t] [Ex p]
see
Ambient temperatures
• Storage/transport
°C
-40 ... +80
• Operation
°C
-25 ... +60
• Temperature compensation
°C
+60
• Permissible rated current at
-
Temperature inside control cabinet 60 °C, stand-alone installation
%
100
100 or 90
1)
-
Temperature inside control cabinet 60 °C, mounted on contactor
%
70
70
-
Temperature inside control cabinet 70 °C
%
On request
Degree of protection
acc. to IEC 60529
• Screw terminals/busbar connections
-
IP20 (front side)
-
Terminal IP00 (use additional terminal covers for higher degree of
protection)
• Straight-through transformers
IP20
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W
H
D
© Siemens AG 2016