Siemens SIRIUS System Manual

SIRIUS System Manual
GWA 4NEB 430 0999-02b
8-1
8
3RW3 semiconductor motor control unit
(soft starter)
Section Subject Page
8.1 Specifications/regulations/approvals 8-3
8.2 Device description 8-5
8.2.1 Physical principles 8-6
8.2.2 General device description 8-10
8.2.3
Comparison of the 3RW3 semiconductor motor cont-
rol unit (soft starter) with the SIKOSTART 3RW22
motor control units
8-14
8.2.4
Comparison of the 3RW3 semiconductor motor cont-
rol unit (soft starter) with the 3RA star-delta combina-
tion
8-16
8.2.5 Notes on configuration 8-16
8.3 Application and use 8-18
8.3.1 Areas of application and criteria for selection 8-18
8.3.2 Installation guidelines 8-18
8.3.3 Overview tables: correction factors 8-21
8.3.3.1 3RW30/31 soft starters in a stand-alone installation 8-21
8.3.3.2
3RW30/31 soft starters in combination with the 3RV1
circuit breaker
8-22
8.3.3.3
Combining the 3RT contactor with the 3RU1 thermal
overload
relay and 3RW3 soft starter
8-24
8.3.3.4
Combining the 3RT contactor with the 3RB10 electro-
nic overload relay and 3RW3 soft starter
8-26
8.3.4 Circuit examples 8-29
8.3.5 Commissioning 8-30

Siemens SIRIUS Specifications

General

Product brand name	Siemens
Series	SIRIUS
Coil Voltage	24V DC, 110V AC, 230V AC
Switching Capacity	Up to 10A
Mounting Type	DIN rail
Product designation	SIRIUS
Contact Material	Silver alloy
Contact Rating	Varies depending on the specific SIRIUS relay model (e.g., 6 A at 250 V AC, 10 A at 250 V AC)
Switching Voltage	Varies depending on the specific SIRIUS relay model (e.g., 250 V AC, 400 V AC)
Mechanical Life	Up to 10 million operations
Electrical Life	Up to 100, 000 operations
Operating Temperature	-25°C to +55°C
Protection Class	IP20
Size of relay base	Varies depending on the specific SIRIUS relay model