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Overload Relays
3RB2 Solid-State Overload Relays
3RB22, 3RB23 for high-feature applications
Type – Overload relay of evaluation module
Size
Width
Auxiliary circuit
Number of NO contacts
Number of NC contacts
Auxiliary contacts – assignment
Rated insulation voltage U
i
(degree of pollution 3)
Rated impulse withstand voltage U
Auxiliary contacts – contact rating
• NC contact with alternating current AC-14/AC-15
I
Rated operational current
at U
e
e
- 24 V
- 120 V
- 125 V
- 250 V
• NO contact with alternating current AC-14/AC-15:
I
Rated operational current
at U
e
e
- 24 V
- 120 V
- 125 V
- 250 V
• NC, NO contact with direct current DC-13:
I
Rated operational current
at U
e
e
- 24 V
- 60 V
- 110 V
- 125 V
- 250 V
I
• Conventional thermal current
th
• Contact reliability
(suitability for PLC control; 17 V, 5 mA)
Short-circuit protection
• With fuse, gL/gG operational class
• With miniature circuit breaker (C characteristic)
Protective separation between main and auxiliary
conducting path
Acc. to IEC 60947-1
CSA, UL, UR rated data
Auxiliary circuit – switching capacity
Connection of the auxiliary circuit
Connection type
• Terminal screw
• Tightening torque
• Conductor cross-section (min./max.), 1 or 2 conductors
- Solid
- Finely stranded without end sleeve
- Finely stranded with end sleeve
- Stranded
- AWG cables, solid or stranded
Connection type
• Conductor cross-section (min./max.), 1 or 2 conductors
- Solid
- Finely stranded without end sleeve
- Finely stranded with end sleeve
- Stranded
- AWG cables, solid or stranded
1) The assignment of auxiliary contacts may be influenced by function expan-
sion modules.
34
Siemens · 2011
V
kV
imp
:
A
A
A
A
:
A
A
A
A
:
A
A
A
A
A
A
A
A
V
Nm
2
mm
2
mm
2
mm
2
mm
AWG
2
mm
2
mm
2
mm
2
mm
AWG
3RB22 83, 3RB23 83
S00 ... S10/S12
45 mm
2
2
1 NO for the signal "tripped due to overload and/or thermistor",
1 NC for switching off the contactor
1 NO for the signal "tripped due to ground fault",
1 NC for switching off the contactor
1)
or
1 NO for the signal "tripped due to overload and/or thermistor and/or ground fault",
1 NC for switching off the contactor
1 NO for overload warning,
1 NC for switching off the contactor
300
4
6
6
6
3
6
6
6
3
2
0.55
0.3
0.3
0.2
5
Yes
6
1.6
300
B300, R300
Screw terminals
Pozidriv size 2
0.8 ... 1.2
1 × (0.5 ... 4), 2 × (0.5 ... 2.5)
--
1 × (0.5 ... 2.5), 2 × (0.5 ... 1.5)
--
2 × (20 ... 14)
Spring-type terminals
2 × (0.25 ... 1.5)
–
2 × (0.25 ... 1.5)
2 × (0.25 ... 1.5)
2 × (24 ... 16)
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