User Manual
SIRIUS 3RU2/3RB3 overload relays
5.10 Technical data
SIRIUS Innovations
540 System Manual, 01/2011, A8E56203870002-03
Type 3RU21 16 3RU21 26
Size S00 S0
Width 45 mm 45 mm
Degree of protection acc. to IEC 60529 IP20
Touch protection acc. to IEC 61140 Screw connection and spring-loaded terminals: finger-safe
Ring cable lug connection: finger-safe only with optional
terminal covers
Shock resistance with sine
acc. to IEC 60068-2-27
g/ms 8 / 10
Electromagnetic compatibility (EMC) - Immunity
Conducted interference suppression
- Burst acc. to IEC 61000-4-4
(corresponds to severity 3)
kV EMC immunity is not relevant in the case of thermal overload
relays
- Surge acc. to IEC 61000-4-5
(corresponds to severity 3)
kV EMC immunity is not relevant in the case of thermal overload
relays
Electrostatic discharge acc. to
IEC 61000-4-2
(corresponds to severity 3)
kV EMC immunity is not relevant in the case of thermal overload
relays
Field-related interference suppression to
IEC 61000-4-3
(corresponds to severity 3)
V/m EMC immunity is not relevant in the case of thermal overload
relays
Electromagnetic compatibility (EMC)
- Emitted interference
EMC immunity is not relevant in the case of thermal overload
relays
Resistance to extreme climates - Humidity % 90
Dimensions See Dimension drawings (dimensions in mm) (Page 552)
Installation altitude above sea level m Up to 2,000; above this, please contact us
Mounting position See Minimum clearances and mounting position (Page 508)
Type of fixing Direct mounting/stand-alone assembly with terminal support
2)
1)
Remote RESET in conjunction with the appropriate accessory
2)
For screw and snap-on mounting onto DIN rail TH 35
5.10.2.2 Main circuit
Table 5- 39 Technical data for the main circuit, 3RU21 overload relays
Type 3RU21 16 3RU21 26
Size S00 S0
Width 45 mm 45 mm
Rated insulation voltage U
i
(pollution degree 3)
V 690
Rated impulse withstand voltage U
imp
kV 6
Rated operational voltage U
e
V 690
Type of current
DC current
Yes
AC current
Yes, frequency range up to 400 Hz