Siemens SIRIUS 3RH Series, System Manual

Page: 255 / 786

SIRIUS 3RT2 contactors/contactor assemblies
2.8 Technical data
SIRIUS Innovations
System Manual, 01/2011, A8E56203870002-03
255
Type 3RT20 23 3RT20 24 3RT20 25 3RT20 26 3RT20 27 3RT20 28
Size S0
Conductor cross-sections (1-wire or 2-wire connection possible)
Main conductor
Ring cable lug connection
Connection screw M4 (Pozidriv size PZ 2)
 Operating tool ∅ 5 to 6

Tightening torque
Nm 2 to 2.5

Usable ring cable lugs
mm d
2
= min. 4.3
mm d
3
= min. 12.2
- DIN 46237 with insulating
sleeve
- JIS C2805 type RAV with
insulating sleeve
- JIS C2805 type RAP with
insulating sleeve
- DIN 46234 without
insulating sleeve
- DIN 46225 without
insulating sleeve
- JIS C2805 type R without
insulating sleeve
PP
≥
1)
A shrink-on sleeve must be used to provide additional insulation for the ring
cable lugs
1)
.
 Application temperature: -55 °C/+155 °C
 UL 224 approved

Flame-protected
Auxiliary conductor
Connection screw M3 (Pozidriv size PZ 2)

Operating tool
∅ 5 to 6

Tightening torque
Nm 0.8 to 1.2
 Usable ring cable lugs
mm d
2
= min. 3.2
mm d
3
= min. 7.5
- DIN 46237 with insulating
sleeve
- JIS C2805 type RAV with
insulating sleeve
- JIS C2805 type RAP with
insulating sleeve
- DIN 46234 without
insulating sleeve
- DIN 46225 without
insulating sleeve
- JIS C2805 type R without
insulating sleeve
PP
≥
1)
A shrink-on sleeve must be used to provide additional insulation for the ring
cable lugs
1)
.

Application temperature: -55 °C/+155 °C

UL 224 approved

Flame-protected
1)
If two different conductor cross-sections are being connected to one clamping point, both cross-sections must be
located in the range indicated. If identical cross-sections are used, this restriction does not apply.