SIEMENS
7/82
Siemens IC 10 · 2017
Overload Relays
SIRIUS 3RU2 Thermal Overload Relays
3RU2 for standard applications
7
1)
If two different conductor cross-sections are connected to one clamping
point, both cross-sections must be in the range specified.
2)
Cable lug and busbar connection possible after removing the box
terminals.
3)
If bars larger than 12 mm x 10 mm are connected, a 3RT2946-4EA2 cover
is needed to maintain the required phase clearance,
see page 7/89
.
4)
When conductors larger than 25 mm
2
are connected, the 3RT2946-4EA2
cover is needed to maintain the required phase clearance,
see page 7/89
.
Type
3RU2116
3RU2126
3RU2136
3RU2146
Size
S00
S0
S2
S3
Main circuit
Rated insulation voltage
U
i
(pollution degree 3)
V
690
1000
Rated impulse withstand voltage
U
imp
kV
6
8
Rated operational voltage
U
e
V
690
Type of current
• Direct current
Yes
• Alternating current
Yes, frequency range up to 400 Hz
Current setting
A
A
0.11 ... 0.16
up to
11 ... 16
1.8 ... 2.5
up to
34 ... 40
11 ... 16
up to
70 ... 80
28 ... 40
up to
80 ... 100
Power loss per unit (max.)
W
4.1 ... 6.3
6.2 ... 7.5
8 ... 14
12 ... 16.5
Short-circuit protection
• With fuse without contactor
See "Selection and ordering data", pages 7/84 ... 7/87
• With fuse and contactor
"Short-Circuit Protection with Fuses/Motor Starter Protectors for Motor Feeders"
see Configuration Manual
.
Protective separation between main and auxiliary current
paths
Acc. to IEC 60947-1
• Screw terminals or ring terminal lug connections
V
440
690: Setting range
25 A
690
• Spring-type terminals
V
440
440: Setting range
25 A
690
Conductor cross-sections of main circuit
Connection type
Screw terminals
Screw terminals
with box
terminal
Terminal screw
M3, Pozidriv
size 2
M4, Pozidriv
size 2
M6, Pozidriv
size 2
4 mm Allen screw
Operating devices
mm
5 ... 6
5 ... 6
5 ... 6
4 mm Allen screw
Prescribed tightening torque
Nm
0.8 ... 1.2
2 ... 2.5
3 ... 4.5
4.5 ... 6
Conductor cross-sections (min./max.),
1 or 2 conductors can be connected
• Solid or stranded
mm
2
2 x (0.5 ... 1.5)
1)
,
2 x (0.75 ... 2.5)
1)
,
max. 2 x 4
2 x (1 ... 2.5)
1)
,
2 x (2.5 ... 10)
1)
2 x (2.5 ... 35)
1)
,
1 x (2.5 ... 50)
1)
2 x (2.5 ... 16)
1)
,
2 x (10 ... 50)
1)
,
1 x (10 ... 70)
1)
• Finely stranded with end sleeve (DIN 46228-1)
mm
2
2 x (0.5 ... 1.5)
1)
,
2 x (0.75 ... 2.5)
1)
2 x (1 ... 2.5)
1)
,
2 x (2.5 ... 6)
1)
;
max.. 1 x 10
2 x (1 ... 25)
1)
,
1 x (1 ... 35)
1)
2 x (2.5 ... 35)
1)
,
1 x (2.5 ... 50)
1)
• AWG cables, solid or stranded
AWG
2 x (20 ... 16)
1)
,
2 x (18 ... 14)
1)
,
2 x 12
2 x (16 ... 12)
1)
,
2 x (14 ... 8)
1)
2 x (18 ... 2)
1)
,
1 x (18 ... 1)
1)
2 x (10 ... 1/0)
1)
,
1 x (10 ... 2/0)
1)
Removable box terminals
2)
• With copper bars
3)
mm
--
--
--
2 x 12 x 4
• With cable lugs
4)
-
Terminal screw
--
--
--
M6
-
Prescribed tightening torque
Nm
--
--
--
4.5 ... 6
-
Usable ring terminal lugs
mm
--
--
--
d
2
= min. 6.3
d
3
= max. 19
Connection type
Spring-type terminals
Operating devices
mm
3.0 x 0.5 and 3.5 x 0.5
Conductor cross-sections (min./max.),
1 conductor can be connected
• Solid or stranded
mm
2
1 x (0.5 ... 4)
1 x (1 ... 10)
--
• Finely stranded without end sleeve
mm
2
1 x (0.5 ... 2.5)
1 x (1 ... 6)
--
• Finely stranded with end sleeve (DIN 46228-1)
mm
2
1 x (0.5 ... 2.5)
1 x (1 ... 6)
--
• AWG cables, solid or stranded
AWG
1 x (20 ... 12)
1 x (18 ... 8)
--
d
2
d
3
I201_12740
© Siemens AG 2016