Connecting The Auxiliary Circuit; Short-Circuit Protection - Siemens SIRIUS 3RT Series System Manual

8.10.2.5

Connecting the auxiliary circuit

Table 8- 22 Technical data for the auxiliary circuit connection, 3RR21 current monitoring relays
Type
Size
Width
Connection type
Connection screw

Tightening torque

Operating tool

Conductor cross-sections (min./max.), 1-wire or 2-wire

- Solid
- Finely stranded with end
sleeve
- AWG cables, solid or stranded
Connection type
Operating tool

Conductor cross-sections (min./max.)

- Solid
- Finely stranded without end
sleeve
- Finely stranded with end
sleeve
- AWG cables, solid or stranded
If two different conductor cross-sections are being connected to one clamping point, both cross-sections must be
1)
located in the range indicated. If identical cross-sections are used, this restriction does not apply.
8.10.2.6

Short-circuit protection

Either fuses (fused design) or motor starter protectors/circuit breakers (fuseless design) must
be used for short-circuit protection. The types of coordination must also be considered when
selecting load feeders from the tables.
References
More information
About the assignments of corresponding short-
circuit protective devices to overload relays with
contactor
SIRIUS Innovations
System Manual, 01/2011, A8E56203870002-03
3RR2141
S00
45 mm
Screw connection
M3, Pozidriv size 2
Nm 0.8 to 1.2
mm ∅ 5 to 6
mm 2 x (0.25 to 1.5)
2
mm 1 x (0.5 to 2.5) ; 2 x (0.5 to 1.5)
2 1)
AWG 2 x (20 to 14)
Spring-loaded connection
mm 3.0 x 0.5
mm 1 x (0.5 to 4); 2 x (0.25 to 1.5)
2
mm 2 x (0.25 to 1.5)
2
mm 2 x (0.25 to 1.5)
2
AWG 2 x (24 to 16)
Can be found
In the configuration guide titled "Configuring
SIRIUS Innovations - Selection data for load
feeders in fuseless and fused designs" (order no.:
3ZX1012-0RA21-1AC0)
SIRIUS 3RR2 current monitoring relays
3RR2142
S0
45 mm
1)
2)
8.10 Technical data
743