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3RU11, 3RB10, and 3RB12 overload relays
SIRIUS System Manual
4-48
GWA 4NEB 430 0999-02b
Type
3RB12 46
3RB12 53
3RB12 57
3RB12 62
Width
70 mm
120 mm
145 mm
230 mm
Main circuit
Rated insulation voltage
U
i
(pollution degree 3)
V
690 (for bare/
uninsulated
conductors)
1000 (for insula-
ted conductors)
1000
Rated impulse strength
U
imp
kV
6
8
Rated operating voltage
U
e
V
690
1000
Current type
Direct current
No
Alternating current
Yes, 50/60 Hz
Current setting
A
1.25 - 6.3
50 - 205
125 - 500
200 - 820
Up to 25 - 100
Power loss per device (max.)
W
Approx. 2
Short-circuit protection
With fuse, without contactor
With fuse and contactor
See the selection and ordering data in the NSK catalog as of page 4/4
See the technical specifications (short-circuit protection with fuses
for motor feeders)
Safe isolation
between
main and auxiliary conducting paths
In acc. with DIN VDE 0106 Part 101
IEC 60 947-1-A1
V
Up to 690 V
(using main cir-
cuit cables with
an impulse with-
stand voltage of
6 kV)
Up to 690
Connection of the main circuit
Connection type
Bar-type trans-
former connec-
tion
Bar connection
Screw-type terminal
• Terminal screw
-
• Tightening torque
Nm
-
• Connection cross-section
(min./max.), 1 or 2 conductors
Single-core
mm
2
-
Finely stranded without wire end ferrule mm
2
-
Finely stranded with wire end ferrule
mm
2
-
mm
2
-
Stranded
mm
2
-
mm
2
-
AWG cables, single- or multi-core
AWG
-
AWG
-
Ribbon cables (number x width x depth)
mm
-
Bar connection
• Terminal screw
-
M8
M10
M 10 or M 12
• Tightening torque
Nm
-
10 to 14
14 to 24
14 to 24 (with
M10)
20 to 25 (with
M12)
• Connection cross-section
Finely stranded with cable lug
mm
2
-
35 to 95
50 to 240
(min./max.)
Stranded with cable lug
mm
2
-
50 to 120
70 to 240
185 to 240
AWG cables, single-core or stranded
with cable lug
AWG
-
1/0 to 250 kcmil 2/0 to 500 kcmil 2/0 to 500 kcmil
With connecting bars (max. width)
mm
-
20 x 4
30 x 6
40 x 8
Bar-type transformer connection
• Opening diameter
mm
10 (devices
≤
25 A max. set
current
I
e
)
15 (devices with
max. 100 A set
current
I
e
)
-
• Conductor cross-section
NYY
mm
2
-
-
•
H07RN-F
10/16
-
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