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8 Semiconductor soft starter 3RW3 (Sanftstarter) Stand 08/99 Section Topic Page 8.1 Regulations/specifications/approvals 8-3 8.2 Description of the unit 8-5 8.2.1 Physical principles 8-6 8.2.2 General description 8-10 8.2.3 Comparison: soft starter 3RW3 with the soft starter- SIKOSTART 3RW22 8-13 8.2.4 Comparison: soft starter 3RW3 with star-delta combi- nation 3RA 8-15 8.2.5 Configuration notes 8-15 8.3 Application and use 8-17 8.3.1 Application areas and selection criteria 8-17 8.3.2 Assembly specifications 8-17 8.3.3 Overview tables:

compensation factors 8-20 8.3.3.1 Soft starter 3RW30/31, stand-alone 8-20 8.3.3.2 Soft starters 3RW30/31 in combination with circuit- breakers 3RV1 8-21 8.3.3.3 Combining the contactor 3RT with the thermal over- load relay 3RU1 and the soft starter 3RW3 8-23 8.3.3.4 Combining the contactor 3RT with the electronic overload relay 3RB10 and the soft starter 3RW3 8-25 8.3.4 Example circuits 8-28 8.3.5 Commissioning 8-29 8.3.6 Operating messages and fault diagnostics 8-31 8.3.7 Timing diagram 8-32 8.4 Accesories 8-33 8.5 Assembly and connection 8-35

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Semiconductor soft starter 3RW3 Section Topic Page 8.5.1 Assembly and connection 8-35 8.5.2 Connection 8-35 8.5.3 Wiring diagrams 8-36 8.6 Dimension drawings 8-39 8.7 Technical data 8-40 8.7.1 Control electronics 8-40 8.7.2 Power electronics 8-41 8.7.3 Installation altitude 8-42 8.7.4 IEC data 8-43 8.7.5 NEMA data 8-44 8.7.6 Short-circuit protection and fuse coordination 8-45 8-2 Stand 08/99

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Semiconductor soft starter 3RW3 8.1 Regulations/specifications/approvals The semiconductor soft starters 3RW3 are approved in conformity with UL and CSA. Tabelle 8-1: Standards and approvals, 3RW3 "In-service switching" The soft starters 3RW3 may be used for "in-service switching" in accordance with DIN VDE 0100 Part 460: A switch for in-service switching must be provided for every circuit that is to be switched independently of the other parts. Switches for in-service switching need not necessarily switch all active conductors of a circuit. "Isolating" The soft starters do not meet the requirements for "isolating" as detailed in DIN VDE 0100 Part 460 and EN 60 947-1".

Each circuit must be capable of being isolated from the active conductors of the power supply. Circuit groups may be isolated by one common device if permitted by the conditions of operation. In the open position, devices with an isolating func- tion must have a corresponding isolating gap and an indicating facility that indicates the positions of the moving contacts. Rev.

08/99 8-3 UL / CSA UL 508 Types of protection, of housings DIN EN Standard profile rail DIN EN 50 022 Electronic soft starters IEC 60947 - 4-2 Shock hazard protection IEC 60947 - 1 and DIN 40050 EMV IEC 60801 - 4 -2 (draft) General definitions DIN EN 602 69 - 1A1 Controllers and switch- ing elements DIN EN 602 69 - 1A1 Gost Approved to Gost CTic EMC conformity mark for Australia (cf. CE mark)

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Semiconductor soft starter 3RW3 Warning notes Warning! Caution The units have been conscientiously tested at the works before delivery and have been found to be in proper working order. During the course of transportation, stresses may occur upon which we have no influence. The soft starter 3RW3...-1.B1. was pro- duced as a Class A device. Use of this product in dwellings may cause radio fre- quency interference. As the result of this, the bypass relays in the main circuit may be in an undefined switching state. In the interests of complete safety, the following procedure is necessary during commissioning or after a replacement of the SIRIUS soft starter:

Apply the supply voltage first in order to set the bypass relays to a defined switch- ing state Then activate the main circuit. If you do not keep to this procedure, the motor may be inadvertently activated and may cause injuries or damage to parts of the system. 8-4 Stand 08/99

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