Siemens SIRIUS 3RF Series

SIRIUS 3RU2/3RB3 overload relays
5.10 Technical data
SIRIUS Innovations
544 System Manual, 01/2011, A8E56203870002-03
Type 3RU21 16 3RU21 26
Size S00 S0
Width 45 mm 45 mm
Short-circuit protection
 With fuse
- Operating class gL/gG A 6
- Quick-response A 10
 With miniature circuit breaker
(C characteristic)
A 6
2)
Protective separation between auxiliary
current paths
acc. to IEC/EN 60947-1
V 440
CSA, UL, and UR rated data
Auxiliary circuit – Switching capacity B600, R300
1)
On request
2)
Up to I
k
≤ 0.5 kA; ≤ 260 V
5.10.2.5 Conductor cross sections, auxiliary circuit
Table 5- 42 Technical data for the auxiliary circuit connection, 3RU21 overload relays
Type 3RU21 16 3RU21 26
Size S00 S0
Width 45 mm 45 mm
Connection type Screw connection
 Connection screw
M3, Pozidriv size 2
 Operating tool
mm ∅ 5 to 6
 Tightening torque
Nm 0.8 to 1.2
 Conductor cross-sections (min./max.), 1-wire or 2-wire
- Solid mm
2
2 x (0.5 to 1.5)
1)
; 2 x (0.75 to 2.5)
1)
- Finely stranded with end sleeve
(DIN 46228 Part 1)
mm
2
2 x (0.5 to 1.5)
1)
; 2 x (0.75 to 2.5)
1)
- AWG cables, solid or stranded AWG 2 x (20 to 16)
1)
, 2 x (18 to 14)
1)
Connection type Spring-loaded connection
 Operating tool
mm ∅ 3.0 x 0.5. ∅ 3.5 x 0.5
 Conductor cross-sections (min./max.)
- Solid mm
2
2 x (0.5 to 2.5)
- Finely stranded without end
sleeve
mm
2
2 x (0.5 to 1.5)
- Finely stranded with end sleeve
(DIN 46228 Part 1)
mm
2
2 x (0.5 to 1.5)
- AWG cables, solid or stranded AWG 2 x (20 to 14)