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System overview
1.7 Components and combinations
SIRIUS Innovations
System Manual, 01/2011, A8E56203870002-03
55
1.7.2.3
SIRIUS 3RU2/3RB3 overload relays
3RU2/3RB3 overload relays
Figure 1-23 S0 overload relay
The thermal and solid-state overload relays are available in the modular system with graded
functionality, which reflects their flexible applicability.
Table 1- 13 3RU2/3RB3 overload relays
Area
Customer benefits
Functions
Current-dependent motor protection
Modular system: Graded functionality for individual requirements
Integrated temperature compensation
Integrated remote reset with 3RB31
Dimensioning and
design
Performance increase:
–
S00 (7.5 kW/16 A)
–
S0 (18.5 kW/up to 40 A)
45 mm width (40 A)
Large wide setting range of 1:4 with 3RB3
High long-term stability through special bimetals with 3RU2
Matched and uniform accessories for thermal and solid-state overload
relays
Screw-type, spring-loaded, ring cable lug connection system (only with
3RU2)
Mounting
advantages
Optional direct mounting on contactor or stand-alone assembly
Removable terminals for control circuit wiring (3RB3)
Same stand-alone assembly support for 3RU2 and 3RB3, with screw-type
and spring-loaded connection systems
Application
areas/customer
benefits
98% lower power consumption than conventional solutions (3RB3)
Lower power loss compared to predecessor (5 to 10% with 3RU2)
Optimum adjustability to the motor current: overlapping ranges up to 60°C,
above that up to 70°C without overlapping
Comprehensive approvals for global applicability (e.g. ATEX)
Reference
More information ...
Is available in ...
About SIRIUS 3RU2/3RB3 overload relays
Chapter 5 "SIRIUS 3RU2/3RB3 overload relays
(Page 485)"
Содержание SIRIUS 3RH Series
Страница 1: ...SIRIUS Innovations System Manual 01 2011 Industrial Controls Answers for industry ...
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Страница 640: ...SIRIUS 3RA21 22 load feeders 6 12 Circuit diagrams SIRIUS Innovations 640 System Manual 01 2011 A8E56203870002 03 ...
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