User Manual

SIRIUS 3RU2/3RB3 overload relays
5.10 Technical data
SIRIUS Innovations
System Manual, 01/2011, A8E56203870002-03
541
Type 3RU21 16 3RU21 26
Size S00 S0
Width 45 mm 45 mm
Current setting A 0.11 to 0.16 to
11 to 16
1.8 to 2.5 to
34 to 40
Power loss per device (max.) W 3.9 ... 6.6 3.9 ... 6
Short-circuit protection
 With fuse without contactor
See "Selection and ordering data" in Catalog
LV 1 N SIRIUS Innovations
 With fuse and contactor
See the chapter titled "Motor starter protectors (Page 379)"
Protective separation between main and
auxiliary courrent paths
acc. to IEC/EN 60947-1
V 440
5.10.2.3 Conductor cross-sections main circuit
Table 5- 40 Technical data for the main 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 M4, Pozidriv size 2
 Operating tool
∅ 5 to 6 ∅ 5 to 6
 Tightening torque
Nm 0.8 to 1.2 2 to 2.5
 Conductor cross-sections (min./max.), 1-wire or 2-wire connection possible
- Solid mm
2
2 x (0.5 to 1.5)
1)
; 2 x (0.75 to 2.5)
1)
2 x (0.5 to 4)
1)
2 x (1 to 2.5)
1)
2 x (2.5 to 10)
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)
2)
2 x (1 to 2.5)
1)
; 2 x (2.5 to 6)
1)
; max. 1 x 10
- AWG cables, solid or stranded AWG 2 x (20 to 16)
1)
; 2 x (18 to 14)
1)
2 x 12
2 x (16 to 12)
1)
2 x (14 to 8)
1)
Connection type Spring-loaded connection
 Operating tool
∅ 3.0 x 0.5 ∅ 3.5 x 0.5
 Conductor cross-sections (min./max.)
- Solid mm
2
1 x (0.5 to 4) 1 x (1 to 10)
- Finely stranded without end sleeve mm
2
1 x (0.5 to 2.5) 1 x (1 to 6)
- Finely stranded with end sleeve
(DIN 46228 Part 1)
mm
2
1 x (0.5 to 2.5) 1 x (1 to 6)
- AWG cables, solid or stranded AWG 1 x (20 to 12) 1 x (18 to 8)