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Overload Relays
3RB2 Solid-State Overload Relays
Accessories
■
Overview
Overload relays for standard applications
The following accessories are available for the 3RB20/3RB21 so-
lid-state overload relays:
• One terminal bracket each for the overload relays size S00 and
S0 (sizes S2 to S12 can be installed as stand-alone installation
without a terminal bracket)
• One mechanical remote RESET module for all sizes
• One cable release for resetting devices which are difficult to ac-
cess (for all sizes)
• One sealable cover for all sizes
• Box terminal blocks for sizes S6 and S10/S12
• Terminal covers for sizes S2 to S10/S12
■
Technical specifications
Terminal brackets for stand-alone installation
Type
For overload relays
Size
General data
Type of mounting
Connection for main 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
42
Siemens · 2011
Overload relays for high-feature applications
The following accessories are available for the 3RB22/3RB23 so-
lid-state overload relays:
• A sealable cover for the evaluation module
• Box terminal blocks for the current measuring modules size S6
and S10/S12
• Terminal covers for the current measuring modules size S6 and
S10/S12
3RB29 13-0AA1
3RB20 16, 3RB21 13
S00
For screw and snap-on mounting onto TH 35 standard mounting rail
Screw terminals
Pozidriv size 2
Nm
0.8 ... 1.2
2
mm
1 × (0.5 ... 2.5),
max. 1 × (... 4)
2
mm
--
2
mm
1 × (0.5 ... 2.5)
2
mm
1 × (0.5 ... 2.5),
max. 1 × (... 4)
AWG
1 × (18 ... 14)
3RB29 23-0AA1
3RB20 26, 3RB21 23
S0
2 ... 2.5
1 × (1 ... 6),
max. 1 × (... 10)
--
1 × (1 ... 6)
1 × (1 ... 6),
max. 1 × (... 10)
1 × (14 ... 10)
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