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SIRIUS
Siemens Industry, Inc. Industrial Control Product Catalog 2017
3/27
3
OVERlOAd RElAYS
Type 3RB30 16,
3RB31 13
3RB30 26,
3RB31 23
3RB30 36,
3RB31 33
3RB30 46,
3RB31 43
3RB30 56,
3RB31 53
3RB30 66,
3RB31 63
Size S00 S0 S2 S3 S6 S10/S12
Width 45 mm 45 mm 55 mm 70 mm 120 mm 145 mm
Auxiliary circuit
Number of NO contacts 1
Number of NC contacts 1
Auxiliary contacts – assignment 1 NO for the signal "tripped",
1 NC for switching off the contactor
Rated insulation voltage U
i
(pollution degree 3) V 300
Rated impulse withstand voltage U
imp
kV 4
Auxiliary contacts – Contact rating
• NC contact with alternating current AC-14/AC-15
Rated operational current
I
e
at U
e
:
AV 42-
AV 021-
4
AV 521-
4
AV 052- 3
• NO contact with alternating current AC-14/AC-15:
Rated operational current
I
e
at U
e
:
AV 42-
AV 021-
AV 521-
AV 052- 3
1)
• NC, NO contact with direct current DC-13:
Rated operational current
I
e
at U
e
:
AV 42- 2
AV 06- 0.55
AV 011- 0.3
AV 521- 0.3
AV 052- 0.11
• Continuous thermal current
I
th
A 5
• Contact reliability
(suitability for PLC control; 17 V, 5 mA)
Yes
Short-circuit protection
• With fuse
Assalc lanoitarepo Gg/Lg- 6
Protective separation between main
and auxiliary conducting path according to IEC 60947-1
V 300
CSA, UL, and UR rated data
Auxiliary circuit – switching capacity
Connection of the auxiliary circuit
Connection type Screw terminal or spring-loaded terminals
Screw terminal
• Terminal screw Pozidriv size 2
mNeuqrot gninethgiT• 0.8 ... 1.2
• Conductor cross-sections (min./max.), 1 or 2 conductors
mmSolid or stranded-
2
1 × (0.5 ... 4), 2 × (0.5 ... 2.5)
mmeveels dne htiw dednarts yleniF-
2
1 × (0.5 ... 2.5), 2 × (0.5 ... 1.5)
- AWG conductors, solid or stranded AWG 2 × (20 ... 14)
Spring-loaded terminals
• Conductor cross-sections (min./max.), 1 or 2 conductors
mmdiloS-
2
2 × (0.25 ... 1.5)
- Finely stranded without end sleeve mm
2
--
mmeveels dne htiw dednarts yleniF-
2
2 × (0.25 ... 1.5)
mmdednartS-
2
2 × (0.25 ... 1.5)
- AWG conductors, solid or stranded AWG 2 × (24 ... 16)
B300, R300
3RB30: B600, R300
3RB31: B300, R300
4
4
4
4
Ground-fault protection (only 3RB31) The information refers to sinusoidal residual currents at 50/60 Hz.
• Tripping value
I
∆
> 0.75 × I
motor
• Operating range
I
Lower current setting value <
I
motor
< 3.5 × upper current setting value
• Response time t
trip
(in steady-state condition)
s < 1
Integrated electrical remote RESET (only 3RB31)
Connecting terminals A3, A4 24 V DC, max. 200 mA for approx. 20 ms, then < 10 mA
Overload Relays
3RB2 / 3RB3 Solid-State Overload Relays
3RB20, 3RB21, 3RB30, 3RB31 up to 630A for standard applications