Table of Contents
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Table of contents
1
Introduction ............................................................................................................................................. 9
1.1
Responsibility of the user for system configuration and functionality ....................................... 9
1.2
1.3
DataMatrix code ...................................................................................................................... 14
2
Standards ............................................................................................................................................. 17
2.1
Standards ................................................................................................................................ 17
3
Product description ............................................................................................................................... 19
3.1
Introduction ............................................................................................................................. 19
3.2
Versions .................................................................................................................................. 21
3.3
Applications ............................................................................................................................. 22
3.4
3RU21 thermal overload relays .............................................................................................. 24
3.5
3RB30 solid-state overload relays .......................................................................................... 27
3.6
3RB31 solid-state overload relays .......................................................................................... 30
4
Product combinations ............................................................................................................................ 35
5
Functions .............................................................................................................................................. 37
5.1
Protection against overload, phase failure, and phase asymmetry ........................................ 37
5.1.1
Functional principle ................................................................................................................. 37
5.1.2
Inverse-time delayed overload release ................................................................................... 38
5.1.3
Tripping classes ...................................................................................................................... 38
5.1.4
Tripping characteristics ........................................................................................................... 39
5.2
Ground fault protection in the case of the 3RB31 ................................................................... 43
5.3
Auxiliary contacts .................................................................................................................... 44
5.4
Indication of the operating state .............................................................................................. 45
5.5
Self-monitoring (3RB30/3RB31 only) ...................................................................................... 45
5.6
Additional functions ................................................................................................................. 46
6
Configuration ........................................................................................................................................ 49
6.1
SIRIUS Innovations system configurator ................................................................................ 49
6.2
Overload relays in motor feeders ............................................................................................ 50
6.2.1
Motor protection with overload relay ....................................................................................... 50
6.2.2
Overview of combinable 3RT2 contactors .............................................................................. 51
6.2.3
Normal and heavy-duty starting .............................................................................................. 52
6.2.4
Contactor assembly for star-delta (wye-delta) start ................................................................ 53
6.2.5
Operation with frequency converters ...................................................................................... 54
SIRIUS Innovations - SIRIUS 3RU2 thermal overload relays / SIRIUS 3RB3 solid-state overload relays
Manual, 09/2014, A5E03656507420A/RS-AA/002
5
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