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Overload Relays
3RU1 Thermal Overload Relays
3RU11 for standard applications
Type
Size
Width
Main circuit
Rated insulation voltage U
i
(degree of pollution 3)
Rated impulse withstand voltage U
Rated operational voltage U
e
Type of current
• Direct current
• Alternating current
Current setting
Power loss per unit (max.)
Short-circuit protection
• With fuse without contactor
• With fuse and contactor
Protective separation between main and auxiliary
conducting path acc. to IEC 60947-1
Connection for main circuit
Connection type
• Terminal screw
• Tightening torque
• Conductor cross-sections (min./max.),
1 or 2 conductors
- Solid
- Finely stranded with end sleeve
- Stranded
- AWG cables, solid or stranded
- Ribbon cable conductors
(number x width x thickness)
Busbar connections
• Terminal screw
• Tightening torque
• Conductor cross-sections (min./max.)
- Finely stranded with cable lug
- Stranded with cable lug
- AWG cables, solid or
stranded, with cable lug
- With connecting bar (max. width)
Connection type
• Conductor cross-sections (min./max.)
- Solid
- Finely stranded without end sleeve
- Finely stranded with end sleeve
- Stranded
- AWG cables, solid or stranded
Footnotes for page 9:
1) Remote RESET in combination with the corresponding accessories.
2) Terminal compartment: degree of protection IP00.
3) The 3RU11 16 overload relay with Cage Clamp terminals can only be ins-
talled as a stand-alone installation.
4) For screw and snap-on mounting TH 35 standard mounting rail; size S3 also
for TH 75 standard mounting rail.
nal brackets see "Accessories" --> "Technical specifications".
10
Siemens · 2011
3RU11 16
S00
45 mm
V
690
kV
6
imp
V
690
Yes
Yes, frequency range up to 400 Hz
A
0.11 ... 0.16 to
9 ... 12
W
3.9 ... 6.6
See "Selection and ordering data"
See "Technical specifications" (short-circuit protection with fuses/motor starter protectors for
motor feeders)
V
440
Screw terminals with box terminal
Pozidriv size 2
Nm
0.8 ... 1.2
2
mm
2 x (0.5 ... 1.5)
2 x (0.75 ... 2.5)
Max. 2 x (1 ... 4)
2
mm
2 x (0.5 ... 1.5)
2 x (0.75 ... 2.5)
2
mm
2 x (0.5 ... 1.5)
2 x (0.75 ... 2.5)
Max. 2 x (1 ... 4)
AWG
2 x (18 ... 14)
mm
--
Busbar connection
--
Nm
--
2
mm
--
2
mm
--
AWG
--
mm
--
Cage Clamp terminals
2
mm
2 x (0.25 ... 2.5)
2
mm
2 x (0.25 ... 2.5)
2
mm
2 x (0.25 ... 1.5)
2
mm
--
AWG
2 x (24 ... 14)
For more detailed information about termi-
3RU11 26
3RU11 36
S0
S2
45 mm
55 mm
1.8 ... 2.5 to
5.5 ... 8 to
20 ... 25
40 ... 50
3.9 ... 6
6 ... 9
3)
440 / 690
500
2 ... 2.5
3 ... 4.5
2)
2)
2 x (1 ... 2.5)
2 x (0.75 ... 16)
2)
2)
2 x (2.5 ... 6)
2)
2)
Max. 2 x (2.5 ... 10)
2)
2)
2 x (1 ... 2.5)
2 x (0.75 ... 16)
2)
2)
2 x (2.5 ... 6)
1 x (0.75 ... 25)
2)
2)
2 x (1 ... 2.5)
2 x (0.75 ... 25)
2)
2)
2 x (2.5 ... 6)
1 x (0.75 ... 35)
2)
2)
Max. 2 x (2.5 ... 10)
2 x (14 ... 10)
2 x (18 ... 3)
1 x (18 ... 1)
2 x (6 x 9 x 0.8)
1)
--
--
--
--
--
Footnotes for page 10:
1) The box terminal is removable. Rail and cable lug connections are possible
if the box terminal is removed.
2) If two different conductor cross-sections are connected to one clamping
point, both cross-sections must lie in the range specified. If identical cross-
sections are used, this restriction does not apply.
3) An operating voltage of 690 V with safe isolation only applies to devices
with screw-type connections; for devices with spring-type connections an
operating voltage of 440 V is applicable.
3RU11 46
S3
70 mm
1000
8
1000
18 ... 25 to
80 ... 100
10 ... 16.5
690
Allen screw 4 mm
4 ... 6
2 x (2.5 ... 16)
2 x (2.5 ... 35)
1 x (2.5 ... 50)
2 x (10 ... 50)
1 x (10 ... 70)
2 x (10 ... 1/0)
1 x (10 ... 2/0)
2 x (6 x 9 x 0.8)
M6 x 20
4 ... 6
2 x 70
3 x 70
2/0
12
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