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Número de pieza 3RU1126-4DB0
Descripción Bimetallic Class 10 Overload Relays
Fabricantes Siemens 
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IEC Overload Relays
SIRIUS 3RU11 Bimetallic Class 10 Overload Relays
GENERAL
Description
3RU11 overload relays belong to the new gen-
eration of SIRIUS 3R control products. The
3RU11 overload relays replace the highly suc-
cessful 3UA5 and 3UA7 devices. Outstanding
features of the new overload relays include
long term stability and long service life. The
overload relays are optimally matched, both
electrically and mechanically, to the 3RT10
contactors. They can also be mounted as a
single unit with the use of a separate mount-
ing bracket. 3RU11 overload relays cannot be
mounted onto 3TF contactors.
The 3RU11 overload relays are available in four
distinct frame sizes up to 100A. The selection
charts in this catalog refer to the different
frame sizes by their catalog numbers, i.e.
3RU111, 3RU112, 3RU113, and 3RU114. The
sixth character in the part number designates
the frame size. This “size number” is consis-
tent with, and matches up to, the same four
frame sizes of the other IEC products in this
catalog. However, it is important to note that
other SIRIUS 3R catalog versions in circulation
throughout the world refer to these four sizes
as S00, S0, S2, and S3 respectively. It is a
possibility that these four frame size refer-
ences (S00, S0, S2, and S3) may appear on
product labels as well.
Application
3RU11 overload relays provide overload pro-
tection for three-phase inductive motors with
rated currents of up to 100A (75HP, AC-3,
480V). They are used in conjunction with
3RT10 contactors to form motor starters.
Ambient conditions
Thanks to the newly integrated bimetal and
continuous temperature compensation, these
devices can be used without derating at an
ambient temperature of up to 60°C (140°F).
Use up to 70°C (158°F) is possible with derat-
ing. (See Siemens Industrial Control Products
Catalog - CPPC-06000).
Auxiliary contacts
The overload relays are equipped with a NC
contact for de-energizing the contactor and a
NO contact for signalling an overload trip.
The breaking capacity of the switching con-
tacts is very high so that the contactor coils
can be switched directly.
Trip class
The 3RU11 overload relays are designed in
accordance with trip class 10, i.e. trips in less
than 10 seconds at 6 times the trip current
setting (FLA).
15
2
36
7
8
49
3RU111 Overload Relay
Phase failure sensitivity
A phase failure sensitivity function is integrat-
ed in order to provide increased protection in
the event of a phase failure, i.e. faster tripping
in the event of a single-phase condition.
Setting the overload relay
The current setting dial can be accessed once
the transparent, sealable cover has been
opened. The overload relay must be set at the
rated full-load amps (FLA) of the motor.
STOP function
Pressing the red STOP button on the overload
relay momentarily opens the NC trip contact.
No other contacts and/or functions are affect-
ed by this STOP button.
Manual/automatic reset
The RESET button/mechanism features trip-
free operation. This means that the overload
relay will trip on an overload condition regard-
less of whether the reset button is pushed in
or not. Manual or automatic reset can be
selected with the blue button. The appropriate
setting is selected by pressing and turning the
button. This setting can then be locked by the
sliding transparent cover.
TEST function and switch
position indicator
The switch position indicator also incorporates
a test function which, when activated, simu-
lates a tripped overload relay. Both auxiliary
contacts are actuated and the switch position
is indicated.
Terminal for contactor coil and
auxiliary contact
When the 3RU111 overload relay is mounted
directly on the contactor, the auxiliary contact
terminal and the coil terminal A2 of the con-
tactor are fed through to the bottom side of
the overload relay. This helps considerably in
expediting the wiring for both new and retrofit
applications. The carry through of the A2 coil
1 Equipment identifying marker
2 Manual/automatic RESET selector switch
3 STOP button
4 Complete Catalog No on front of device
5 Switch position indicator and TEST
function
6 Transparent cover, sealable (secures the cur-
rent setting screw, TEST function and
manual/automatic RESET position)
7 Current setting dial
8 Terminal for contactor coil (when mounted on
contactor)
9 Terminal for contactor aux. contacts (when
mounted on contactor)
terminal to the bottom of the overload relay is
not necessary with the 3RU112, 3RU113, and
3RU114 devices since the associated contac-
tors are equipped with four point coil connec-
tions and the auxiliary contacts are either front
or side mounted.
Cage Clamp connection
3RU11 overload relays are available with Cage
Clamp terminals. 3RU111 overloads have Cage
Clamps on the auxiliary and power terminals.
3RU112, 3RU113, and 3RU114 overloads, how-
ever, have Cage Clamps on the auxiliary termi-
nals only. The power terminals on 3RU112,
3RU113, and 3RU114 overloads must remain
screw type.
Accessories
The accessories available are suitable for use
with all frame sizes.
• Electrically operated remote RESET
available in different voltages
• Plunger type mechanical RESET
for new and existing enclosure
installations
• Flexible cable type RESET mechanism
for applications where the devices are
not easily accessible
Environment
The devices are manufactured using environ-
mentally-friendly and recyclable materials only.
Specifications
IEC 947-1, IEC 947-5-1, and DIN VDE 0660.
3RU11 overload relays are suitable for use in
any climate when used with the correct
enclosure.
The devices are shock-hazard protected to
DIN VDE 0106, Part 100.
Approvals
UL, CSA, CE marked.
Siemens Energy & Automation, Inc. - SIRIUS 3R IEC Contactors Catalog Supplement 19

1 page




3RU1126-4DB0 pdf
IEC Overload Relays
SIRIUS 3RB10 Solid State Overload Relays
SELECTION
Description
Class 10 or 20, solid state overload relays for direct mounting to 3RT10 contactors or for
separate mounting the 3RB10, 3RB102, 3RB103, and 3RB104 use the 3RW19 separate
mounting kit for separate mounting. For separate mounting the 3RB105, and 3RB106 use
the terminal blocks from page 24.
These overloads include: 1 NO & 1 NC Auxiliary Contacts, Manual/Automatic RESET,
Trip Indicator, STOP Button, Test Function, Sealable Cover.
Ordering Information
B For Accessories, Technical Data, and
Dimensions see Siemens Industrial
Control Products Catalog - CPPC-06000.
3RB101
3RB102
For Setting Manual / Automatic Reset
Contactor Range
Type Amps
Class 10
Catalog No.
Price $
3RB101—for direct mounting to 3RT101 contactors
Class 20
Catalog No.
Price $
3RT1015,
3RT1016,
3RT1017
0.1–0.4
0.4–1.6
1.5–6
3–12
3RB1016-1RB0
3RB1016-1NB0
3RB1016-1PB0
3RB1016-1SB0
72.
72.
72.
72.
3RB1016-2RB0
3RB1016-2NB0
3RB1016-2PB0
3RB1016-2SB0
72.
72.
72.
72.
3RB102—for direct mounting to 3RT102 contactors
3RT1023,
3RT1024,
3RT1025,
3RT1026
0.1–0.4
0.4–1.6
1.5–6
3–12
6–25
3RB1026-1RB0
3RB1026-1NB0
3RB1026-1PB0
3RB1026-1SB0
3RB1026-1QB0
74.
74.
74.
74.
74.
3RB1026-2RB0
3RB1026-2NB0
3RB1026-2PB0
3RB1026-2SB0
3RB1026-2QB0
74.
74.
74.
74.
74.
3RB103—for direct mounting to 3RT103 contactors
3RT1033,
3RT1034,
3RT1035,
3RT1037
6–25
13–50
3RB1036-1QB0 88.
3RB1036-1UB0 110.
3RB1036-2QB0 88.
3RB1036-2UB0 110.
3RB104—for direct mounting to 3RT104 contactors
3RT1044,
3RT1045,
3RT1046
13–50
25–100
3RB1046-1UB0 140.
3RB1046-1EB0 224.
3RB1046-2UB0 140.
3RB1046-2EB0 224.
Manual Reset Only
Class 10
Catalog No. Price $
Class 20
Catalog No.
3RB1015-1RB0
3RB1015-1NB0
3RB1015-1PB0
3RB1015-1SB0
67.
67.
67.
67.
3RB1015-2RB0
3RB1015-2NB0
3RB1015-2PB0
3RB1015-2SB0
3RB1025-1RB0
3RB1025-1NB0
3RB1025-1PB0
3RB1025-1SB0
3RB1025-1QB0
69.
69.
69.
69.
69.
3RB1025-2RB0
3RB1025-2NB0
3RB1025-2PB0
3RB1025-2SB0
3RB1025-2QB0
3RB1035-1QB0 83.
3RB1035-1UB0 105.
3RB1035-2QB0
3RB1035-2UB0
3RB1045-1UB0 130.
3RB1045-1EB0 215.
3RB1045-2UB0
3RB1045-2EB0
Price $
67.
67.
67.
67.
69.
69.
69.
69.
69.
83.
105.
130.
215.
3RB1056-1FW
3RB105—for direct mounting to 3RT105 contactors
3RT1054
3RT1055
3RT1056
50 -200
50 -200
3RB1056-1FW0a 275.
3RB1056-1FG0 s 275.
3RB1056-2FW0a 275.
3RB1056-2FG0 s 275.
3RB1055-1FW0a d
3RB1055-1FG0 s d
3RB10565-2FW0a d
3RB1055-2FG0 s d
3RB1056-1FW
3RB106—for direct mounting to 3RT106 and 3RT107 contactorss
3RB106
3RB107
50-250
200 -540
300 - 630
3RB1066-1GG0
3RB1066-1KG0
3RB1066-1LG0
305.
450.
800.
3RB1066-2GG0 305.
3RB1066-2KG0 450.
3RB1066-2LG0 800.
a Overload contains pass through windows.
s Overload has busbar connections.
d Available March 2002
3RB1065-1GG0 d
3RB1065-1KG0 d
3RB1065-1LG0 d
3RB1065-2GG0
3RB1065-2KG0
3RB1065-2LG0
d
d
d
Siemens Energy & Automation, Inc. - SIRIUS 3R IEC Contactors Catalog Supplement 23

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