Siemens 3RU11 - Page 8

Overload Relays
General data
6
Siemens · 2011
1) When using the overload relays with trip class ≥ CLASS 20, see "Technical
specifications", "Short-Circuit Protection with Fuses for Motor Feeders",
and the Configuration Manual „SIRIUS Configuration - Selection data for
Fuseless Load Feeders“, Order No. 3ZX1012-0RA21-0AC0"
or as a PDF file on the Internet at
http://support.automation.siemens.com/WW/view/en/40625241
Connection methods
The 3RB20 and 3RB21 relays are available with screw terminals
(box terminals) or spring-type terminals on the auxiliary current
side; the same applies for the evaluation modules of the
3RB22/3RB23 relays.
The 3RU11 relays come with screw terminals.
Overload relay Current
measure-
ment
Current
range
Contactors (type, size, rating in kW)
3RT10 1 3RT10 2 3RT10 3 3RT10 4 3RT10 5 3RT10 6 3RT10 7 3TF68/69
S00S0S2S3S6S10 S12Size 14
Type Type A 3/4/5.5 5.5/7.5/11 15/18.5/22 30/37/45 55/75/90 110/132/160 200/250 375/450
3RU11 thermal overload relays
3RU11 1 Integrated 0.11 … 12 ✔ -- -- -- -- -- -- --
3RU11 2 Integrated 1.8 … 25 -- ✔ -- -- -- -- -- --
3RU11 3 Integrated 5.5 … 50 -- -- ✔ -- -- -- -- --
3RU11 4 Integrated 18 … 100 -- -- -- ✔ -- -- -- --
3RB20
1)
solid-state overload relays
3RB20 1 Integrated 0.1 … 12 ✔ -- -- -- -- -- -- --
3RB20 2 Integrated 0.1 … 25 -- ✔ -- -- -- -- -- --
3RB20 3 Integrated 6 … 50 -- -- ✔ -- -- -- -- --
3RB20 4 Integrated 12.5 … 100 -- -- -- ✔ -- -- -- --
3RB20 5 Integrated 50 ... 200 -- -- -- -- ✔ -- -- --
3RB20 6 Integrated 55 ... 630 -- -- -- -- -- ✔✔✔
3RB20 1 +
3UF18
Integrated 630 ... 820 -- -- -- -- -- -- -- ✔
3RB21
1)
solid-state overload relays
3RB21 1 Integrated 0.1 … 12 ✔ -- -- -- -- -- -- --
3RB21 2 Integrated 0.1 … 25 -- ✔ -- -- -- -- -- --
3RB21 3 Integrated 6 … 50 -- -- ✔ -- -- -- -- --
3RB21 4 Integrated 12.5 … 100 -- -- -- ✔ -- -- -- --
3RB21 5 Integrated 50 ... 200 -- -- -- -- ✔ -- -- --
3RB21 6 Integrated 55 ... 630 -- -- -- -- -- ✔✔✔
3RB21 1 +
3UF18
Integrated 630 ... 820 -- -- -- -- -- -- -- ✔
3RB22/3RB23
1)
solid-state overload relays
3RB29 0 0.3 … 25 ✔ ✔ -- -- -- -- -- --
3RB29 0 10 ... 100 -- -- ✔✔-- -- -- --
3RB22/3RB23 + 3RB29 5 20 … 200 -- -- -- -- ✔ -- -- --
3RB29 6 63 ... 630 -- -- -- -- -- ✔✔✔
3RB29 0 +
3UF18
630 ... 820 -- -- -- -- -- -- -- ✔
Screw terminals (box terminals)
Spring-type terminals
These connections are indicated in the Technical
specifications by orange backgrounds.