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3rw44 manual espa olSeries Manual If products and components from other manufacturers are used, these must be recommended or approved by Siemens. Proper transport, storage, installation, assembly, commissioning, operation and maintenance are required to ensure that the products operate safely and without any problems. Definitions Where the short form 3RW44 is used in the text, it refers to the SIRIUS 3RW44 soft starter.Siemens’ products and solutions only form one element of such a concept. Customer is responsible to prevent unauthorized access to its plants, systems, machines and networks. There is one thyristor for the positive and one thyristor for the negative half-wave. The rms value of the motor voltage is increased (from an adjustable starting voltage or starting torque) to the rated motor voltage within a definable starting time by means of the leading-edge phase. Their main benefits are their ability to perform soft starting, soft stops, and uninterrupted changeover without current peaks that put a strain on the system, as well as their compact dimensions. In case of heavy starting or increased starting frequency, a larger unit may have to be selected. For long starting times it is recommended to have a PTC sensor in the motor. This also. See also Chapter Technical data of the power unit (Page 259). A larger soft starter may have to be selected if these values are exceeded. DANGER Hazardous voltage. Danger to life or risk of serious injury. If line voltage is present at the input terminals of the soft starter, hazardous voltage may still be present at the soft starter output even if a start command has not been issued. If the contactor is not connected within 100 ms of activation of the start command for the 3RW44, the soft starter no longer recognizes the current circuit variant (standard circuit or inside-delta circuit).http://schoolinglog.com/sawaree/sources/userfiles/test1/Uimages/40-su0026w-manual.xml
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If the contactor is not connected within 100 ms of activation of the start command for the 3RW44, the soft starter no longer recognizes the current circuit variant (standard circuit or inside-delta circuit). If the contactor is not connected within 100 ms of activation of the start command for the 3RW44, the soft starter no longer recognizes the current circuit variant (standard circuit or inside-delta circuit). Special semiconductor fuses, e.g. SITOR fuses from SIEMENS, must be used for this purpose. Figure 4-8 Connections. The 3RW44 display will be inverted and the display and control module's display will be shown normally. The menu has various sub-levels, which must be handled in different ways but are self-explanatory. 6.1.1 Menu structure and navigation. Make sure that the line and control voltages comply with the device-specific requirements (refer to chapter Technical data (Page 253)). 6.2.1 Recommended procedure for commissioning 3RW44 Suggested Startup parameters Stopping parameters. It should be high enough to ensure that the motor does not become stuck during run-up.The level change from 0 to 24 V DC is evaluated at the input.When an ATEX-certified overload relay is used (e.g. 3RB2 from Siemens) that affects an additional switching element (e.g. contactor), the 3RW44 can be installed in series with this overload relay, meaning that the ATEX requirements are met. Note The operating hours counter is activated as soon as control voltage is applied to the soft starter.The motor start can be optimally adapted to each particular application. 7.2.1 Voltage ramp The simplest type of soft start with the SIRIUS 3RW44 soft starter is achieved using a voltage ramp. The motor stop can be optimally adapted to each particular application. If a start command is issued during the stop process, the process is interrupted and the motor is started again with the set startup mode. You will find suggested circuits in chapter Typical circuit diagrams (Page 216).http://www.gesgo.de/userfiles/40-yamaha-outboard-manual.xmlThe maximum torque that can be generated depends on the selected slow speed. 100 slow speed torque can be equivalent to approximately 30 of the rated motor torque.The following schematic diagram shows the cooling behavior with and without idle time.Emergency start active The emergency start function is activated.In the case of pumps, for example, a breakaway pulse often leads to misfiring.) If there is an idle time Heatsink sensor short-circuit The temperature sensor on the heatsink of the starter is not connected or defective. You will find the manual for the PROFINET communication module on the Internet ( ). Parameter assignment is only possible via the GSD file and only cyclic data is transmitted, no data sets or alarms. Further documentation on the subject of PROFINET IO SIRIUS PROFINET communication module for 3RW44 soft starter ( ) operating instructions with. Turn off and lock out all power supplying the system and device before working on the device. Read the information in the SIRIUS PROFIBUS communication module for 3RW44 soft starter ( ) operating instructions with the article number 3ZX1012-0RW44-0KA0. Gently press the screwdriver downwards (2) and remove the cover (3). Insert the PROFIBUS DP communication module into the device (4). The next step is to assign the desired station address for the 3RW44 as a PROFIBUS slave.The soft starter is integrated into your system as a standard slave by means of the GSD file. You can download the GSD file from the Internet ( ).Identifier- related diagnostics begins at byte 6 and is 2 bytes long.When all locations have been written, the first entry is overwritten again. Note The newest entry is entered at the end of the data set.When all locations have been written, the first entry is overwritten again. Note The newest entry is entered at the end of the data set.Parameters disabled Parameterization by parameterizing master is possible.The loads should have similar mass moments of inertia and torque curves.http://www.drupalitalia.org/node/67718 The loads should have similar mass moments of inertia and torque curves. Note In the case of increased operating sequences, the 3RW44 should be dimensioned at least one capacity level higher than the highest connected motor output. 3RW44 soft starters. Note In the case of increased operating sequences, the 3RW44 should be dimensioned at least one capacity level higher than the highest connected motor output.Safe disconnection can also be realized, for example, with a 3SK1 safety relay and power contactors.At most, welding of the contactor coordination. Discover everything Scribd has to offer, including books and audiobooks from major publishers. Start Free Trial Cancel anytime. Report this Document Download Now save Save Manual Soft Starter 3rw44 Siemens For Later 594 views 0 0 upvotes 0 0 downvotes Manual Soft Starter 3rw44 Siemens Uploaded by Ale Maria Description: Full description save Save Manual Soft Starter 3rw44 Siemens For Later 0 0 upvotes, Mark this document as useful 0 0 downvotes, Mark this document as not useful Embed Share Print Download Now Jump to Page You are on page 1 of 255 Search inside document Browse Books Site Directory Site Language: English Change Language English Change Language. Opcional hasta el tamano S3 (variante del aparato). En 3RW40 2. hasta 3RW40 4.; en 3RW40 5. y 3RW40 7. opcional. En caso necesario se deberan sobredimensionar el arranc. Para montaje frontal. La pensada disposicion de las conexiones, cable de alimentacion en la parte superior y conexion a la carga en la parte inferior, facilita la instalacion en el armario electrico. Los reles estaticos pueden montarse sobre superficies de refrigeracion (disipadores) existentes. El montaje resulta tan facil como rapido y no requiere mas que dos tornillos. La tecnologia especifica de semiconductor de potencia roporciona un contacto termico muy bueno con el disipador. La corriente tipo indica la capacidad del rele estatico.https://www.davidpipe.com/images/3s-fe-engine-manual-pdf.pdf Dependiendo del sistema de conexion y de las condiciones de enfriamiento, la intensidad asignada de empleo Ie realmente admisible puede resultar menor. 2) Tenga en cuenta que esta version solo puede emplearse hasta la intensidad asignada de aprox. 50 A y con seccion del conductor de 10 mm2. 1) 0 2 3) 0 2 Tenga en cuenta que la version con bornes de resorte solo puede emplearse hasta la intensidad asignada de aprox. 20 A y con seccion del conductor de 2,5 mm2. Las intensidades mayores se obtienen conectando dos conductores por cada punto de conexion. Otras tensiones asignadas de mando bajo consulta. Esto permite reemplazar facilmente los reles estaticos en instalaciones existentes. El cable de mando se enchufa de la misma forma que en el caso de los reles con 22,5 mm de ancho, lo que ayuda a ahorrar espacio. La especial tecnologia de semiconductor de potencia roporciona un contacto termico muy bueno con el disipador. La tecnologia logica de conexion, con cable de alimentacion en la parte superior y conexion a la carga en la parte inferior, facilita la instalacion nitida en el armario electrico. Ilustraciones similares 3) Tenga en cuenta que la version con bornes de resorte solo puede emplearse hasta la intensidad asignada de aprox. 20 A y con seccion del conductor de 2,5 mm2. La gama incluye intensidades asignadas predefinidas para simplificar al maximo la seleccion. Dependiendo de la version se obtienen intensidades de hasta 88 A. Igual de todos los demas componentes de nuestra serie de aparellaje estatico, tambien estos aparatos destacan por su formato compacto y sus pequenas dimensiones. Para otras aplicaciones, tales como las de proteccion ampliada de personas, el disipador se puede poner a tierra mediante una conexion por tornillo. Asi es posible instalar derivaciones resistentes a cortocircuitos en combinacion con un automatico magnetotermico del tipo B o un fusible convencional para la proteccion de cables. No obstante, para que la proteccion contra cortocircuitos mediante automaticos magnetotermicos funcione sin problemas, es necesario tener en cuenta algunas condiciones generales tales como las caracteristicas de la instalacion, por ejemplo la resistencia interna de la alimentacion de la red, ademas del comportamiento de corte en cortocircuito del automatico magnetotermico. Determinar la limitacion mediante aparatos de maniobra y cables, asi como el nivel y la duracion de la corriente de cortocircuito. Debe ponerse especial atencion tambien en estos parametros. La corriente tipo indica la capacidad del contactor estatico. La intensidad asignada de empleo Ie realmente admisible puede ser menor, dependiendo de la tecnologia de conexion y de la configuracion. Con nuestros modulos de funcion resulta ahora mas facil que nunca cumplir estos requisitos. Los elementos complementarios se fijan por simple abroche sobre el aparato base; eso es todo lo que hay que hacer para establecer la conexion con el rele o con el contactor estatico. Las conexiones por enchufe para el mando del aparellaje estatico se pueden seguir utilizando. Las conexiones externas son por bornes de tornillo. Por medio de un bloque de conexion, los modelos con bornes de tornillo pueden conectarse directamente a un automatico magnetotermico 3RV2.En comparacion con los sistemas tradicionales, para los cuales se requieren dos contactores, los contactores de inversion trifasicos permiten reducir la anchura en hasta un 50 . Los aparatos con 45 mm de ancho son adecuados para motores hasta 2,2 kW, y con 90 mm de ancho, para motores hasta 3 kW. Por medio de un bloque de conexion, los aparatos pueden ser conectados directamente a un interruptor automatico. Ilustraciones similares We are a non-profit group that run this service to share documents. We need your help to maintenance and improve this website. Siemens Sirius 3RW44 Series SoftStart for 315kW ( 475HP) 400V 3 Ph motor. Das Motorst euergerat SIKOSTART 3RW34 wird in offener Ausfuhrung geliefert. Please try again later. The sales contract contains the entire obligation sikostart 3rw44 manual of Siemens. View and Download Siemens 3RW44 manual online. Features include: sikostart 3rw44 manual By- Pass Contactor.This manual contains notices you have to observe in order to ensure your personal safety, as well as to prevent damage to property. VA 230 V kW 400 V. At Synchronics we have the experience in repairing Siemens, Soft Starter SIKOSTART 3RW34 in a timely and cost effective manner. Price 1 unit PC communication program COM SIKOSTART User interface for PC communication via RS 232 serial interface. Para usted, in situ, en todo el sikostart 3rw44 manual mundo: Su socio para el asesoramiento, las ventas, la formacion, el servicio y sikostart 3rw44 manual las piezas de recambio, etc. The SIKOSTART 3RW22 compact starters have the following service. 2 3RW34 SIKOSTART Features The SIKOSTART 3RW34product line is the next generation of Siemens solid state reduced voltage controllers. SIRIUS 3RW44 manual i GWA 4NEBDS 06. SIRIUS 3RW44 in sikostart 3rw44 manual Detail 14 Soft Starter ES Comfortable Parameterization and Evaluation of SIRIUS 3RW44 16 Block Library SIRIUS 3RW44 for SIMATIC PCS 7 Parameterization, configuration and visualization of SIRIUS 3RW44 18 SIRIUS Soft Starters in Practical Use Application Examples 20 Overview of SIRIUS Soft Starters Technical Data 22. 3RW3 semiconductor motor control unit SIRIUS System Manual GWA 4NEBc 8- 5 8. Ampeon has the technical knowledge and resources to 3rw44 repair your 3RW3483- 0DC34 SIEMENS SIKOSTART 3RW34. Manual - SIRIUS 3RW44 Soft Starter. Jedes Gera t sikostart weist Parameter fur den Sanftan- lauf und - auslauf sowie Fehler erkennung auf. Soft Starter 3RW44 System Manual. SIKOSTART 3RW34 Selection and ordering data Solid- State Motor Controllers Only supplied in packs.Sikostart AC Semiconductor Motor Controller. WelcomeLog in Sign up. Soft Starter 3RW44 Manual. Adjustable Current Limit. Note that the instructions in this manual do not coverall details orvariations in equipment, norprovide for every possible contingency to be met in connection with installation, operation, ormaintenance. Installation 1 English 1 Installation Mounting position SIKOSTART 3RW22 can be installed on open switchboards, in enclosed switchboxes or in switchgear cabinets. Maintenance data consists of troubleshooting and spare parts information.These notices shown below are. Switching Devices Soft Starters and Solid- State Switching Devices SIRIUS 3RW Soft Starters sikostart 3rw44 manual High performance soft starters. Industrial Control Soft sikostart 3rw44 manual Starters. The contents of this instruction manual shall not become part of ormodify any priororexisting agreement, commit- ment orrelationship. As a leading Industrial Electronics Repair company in North America, Ampeon provides fast, reliable and professional repairs to your 3RW3483- 0DC34 SIEMENS SIKOSTART 3RW34.Buy online now or contact us for manuals or pdfs. The one thing that Siemens Sirius Soft Starter sikostart 3rw44 Manual does not do ( and it' s a big QUANTITATIVE APTITUDE QUANTUM CAT PDF FREE DOWNLOA. Siemens Soft Starter Manual Pdf Controls — Soft Starters and Solid- State Switching Devices.Altitude The maximum permissible altitude is 3, 000 m above sea level. MANUAL OPERATION WITH COM INTERFACE FOR PC CABLE. 3RW2920- 6LH00, Siemens, THYRISTOR MODULE FOR SIKOSTART FUNCTIONS OR F. This feature is not available right now. Synchronics Provides Expert Electronic Repairs For Siemens, Soft Starter SIKOSTART 3RW34.SIEMENS 3RW3472- 0DC34 SIKOSTART 3RW34 on Schneider Electric Repair. Note that the instructions in this manual do not cover all details or variations in equipment, nor provide for every.With SIRIUS soft starters, e.; Page 3 Table of Contents Important Notes Introduction Configuration Instructions SIRIUS Installation, Connection and Branch Layout Soft Starter Display, Controls and Device Interfaces 3RW44 Commissioning Manual Device Functions Diagnosis and Messages Communication Module PROFIBUS DP Circuit Examples General. Click to Check if In- Stock.Siemens Industry Catalog - Automation technology - Industrial controls - Switching devices - Soft starters and solid- state switching devices - SIRIUS 3RW soft starters - High Performance soft starters - 3RW44 soft starters. 1 Scope of Manual This manual provides an overview for the installation, setup and operation of the Siemens SIKOSTART 3RW35 controller. The notices referring to your personal safety are highlighted in the manual by a safety alert symbol, notices referring only to property damage have no safety alert symbol. Schneider Electric Repair Home Sitemap Contact Us Tell us how we' re doing. The 3RW40 standard soft starter up to 250 kW and the high- feature soft starter 3RW44 are available as successor types for the 3RW34.Der SIKOSTART 3RW34 ist ein mit einer 3rw44 Spannungsrampe arbeitendes Motorsteuergerat, das fur das sikostart 3rw44 manual Speisen von Drehstrominduktionsmotoren mit Phasenan schnittsteuerung arbeitet. First Multi Ever Corporation Sdn Bhd - REPAIR SIEMENS SIKOSTART 3RW22 3RW34 3RW35 SOFT STARTER MALAYSIA SINGAPORE BATAM JAKARTA. Siemens Soft Starter 3rw44 Manual Pdf i am having simens make type- 3rw3046- 1ab14 sikostart 3rw44 manual soft starters 15 nos installed in my SIEMENS SOFT STARTER 3RW44 MANUAL PDF Siemens Soft sikostart 3rw44 manual Starter. The warranty contained in the 3rw44 contract between the parties is the sole warranty of Siemens. Remote reset for trip. For technical data, please refer to the current catalogs, the PMD or contact the Technical Assistance for low- voltage switching devices. 2 Device description The SIRIUS 3RW3 soft starters are part of the SIRIUS modular system. Contador de eventos y hora de uso motor (mantenimiento predictivo). Reducir el desgaste de engranajes y de correas trapezoidales en ventiladores.Clase 20: Arranque pesado, hasta 40 segundos con una corriente de arranque del 350 x In. Ejemplo: mezcladoras, centrifugadoras y fresadoras. Clase 30: Arranque extra pesado, hasta 60 segundos con una corriente de arranque del 350 x In. Por ejemplo: ventiladores grandes, molinos y trituradores.Funciones y Caracteristicas Seleccion de parametros de fabrica para aplicaciones tipicas. Auto sintonizacion de parametros para aplicaciones especificas. El metodo de control digital ofrece ESCUELA: ING. ELECTRONICA Tabla de contenido indice. 1 Objetivos. 2 Anillos rozantes. 3 Rotor de Solicitar la colaboracion de una persona Objetivos Especificos Utilizar el variador de velocidad G110 de Sistemas de arranque con CST Answers for industry.Desarrollamos proyectos llave en mano enfocados a la Calidad y Eficiencia en el consumo. Transformadores. Subestaciones. La norma IEC 1082-1 define y fomenta los simbolos graficos Un contactor principal: Puede ser necesario Folleto tecnico De que forma un variador de frecuencia contribuye al Tension de salida: 24VDC. Potencia de salida: W. Tension de salida:. Potencia de salida: 5.0W. pag. CEE IMM 8000\Demo04 Recinto universitario Pedro Arauz palacios. Facultad de tecnologia de la industria. Ingenieria mecanica Guia 2 1 Tema: UTILIZACION DE SOFTWARE PARA DISENO Y SIMULACION DE CIRCUITOS NEUMATICOS. Caracteristicas de diseno: La boca de aspiracion cuenta con un colector que permite la entrada fluida Caracteristicas que hacen la diferencia! ARRANQUE DIRECTO.- Es un sistema de arranque obtenido en un solo tiempo; el estator del motor se acopla directamente Es una puerta que puede instalarse tanto en interior y en exterior, se puede Caracteristicas tecnicas generales Es un mando auxiliar, ya que interviene en el motor de Comfort 220. Articulo N?. de art. Funcion El objetivo primordial del proceso de deshidratacion es reducir el contenido de Ministerio de Salud Publica y Asistencia Social HOSPITAL: Informacion de producto BAT 490. Automotive Aftermarket Objetivo: El objetivo del laboratorio de motores electricos es la de formar a profesores y alumnos con la mas alta tecnologia Manual de Conduccion Eficiente QUE SON LAS TECNICAS DE CONDUCCION EFICIENTE. La conduccion eficiente consiste en una serie de tecnicas de conduccion que, unidas Con esta tecnologia, la salida del generador es estable al 100 y mientras tanto, Factor de correccion del arco de contacto. Regulacion automatica en 32 escalones. Ajuste de temporizacion. Ajuste de insensibilidad. Compensador de caida de tension en Herramientas y Aplicacion Ejemplo Herramientas y Aplicacion Ejemplo Panasonic Electric Works Espana Motion Control Agenda Definicion de inercia y ejemplos Tiempo en que se embraga la Toma de Fuerza. Carga en la transmision. Su division CM Rigging es la encargada La frecuencia (medida en Hz) del sistema de potencia para el cual el banco del capacitor es disenado. Estos pueden clasificarse Terminos de Referencia para Proyectos de Equipamiento y Electrificacion para Agua Potable Soluciones integrales para la mejora de la rentabilidad y la eficiencia de las To use this website, you must agree to our Privacy Policy, including cookie policy. Page 7 and 8: 3RW44 Menustruktur Messwertanzeige Page 9 and 10: Steuerelektronik 3RW44.-.BC3. 3RW4 Page 11 and 12: Technische Daten Bemessungsbetriebs Page 13 and 14: 3RW44 Soft starter English Safety I Page 15 and 16: Examples of Circuit Diagrams Main c Page 17: Quick start menu Factory settings C Page 21 and 22: Quick commissioning menu, when swit Page 23 and 24: Rated operating voltage U e V 200. Page 25 and 26: IMPORTANT Respecter un espace libre Page 27 and 28. Dan Page 29 and 30: 3RW44 Structure de menu Affichage d Page 31 and 32: Electronique de commande 3RW44.-.B Page 33 and 34: Caracteristiques techniques Montag Page 35 and 36: Arrancador suave 3RW44 Espanol Adv Page 37 and 38: Ejemplos de circuitos Circuito prin Page 39 and 40: Menu de inicio rapido Ajustes de Page 41 and 42: Ajustes de fabrica Comportamiento Page 43 and 44: Menu de inicio rapido, aparece de Page 45 and 46: Conexion dentro del triangulo Con Page 47 and 48: ATTENZIONE Lasciare abbastanza spaz Page 49 and 50. Page 51 and 52: 3RW44 Struttura di menu Visualizzaz Page 53 and 54: Elettronica di comando 3RW44.-.BC3 Page 55 and 56: Dati tecnici Circuito standard Circ Page 57 and 58: Chave de partida suave 3RW44 Portug Page 59 and 60: Exemplos de ligacao Circuito prin Page 61 and 62: Menu de partida rapida Ajuste de f Page 63 and 64: Ajuste Fabrica Comportamento em ca Page 65 and 66: Menu de partida rapida, na primeir Page 67 and 68: Tensao nominal de operacao U e V Page 69 and 70: DIKKAT Sogutma icin yeterli hava Page 71 and 72:.Thank you, for helping us keep this platform clean. The editors will have a look at it as soon as possible. Table of Contents Important Information. Introduction 1. Configuration Instructions 2 Depending on the degree of risk, the instructions are presented as follows. Danger means that death or serious physical injuries will follow if you do not take the appropriate precautionary measures. Warning means that death or serious physical injuries may follow if you do not take the appropriate precautionary measures. Caution with a warning triangle means that minor physical injuries may follow if you do not take the appropriate precautionary measures. Caution without a warning triangle means that damage to property may follow if you do not take the appropriate precautionary measures. Notice means that an undesired result or condition may occur if the corresponding instruction is not observed. Where several degrees of risk are present at the same time, the instruction for the highest degree of risk is used. If an instruction with a warning triangle contains a warning against personal injury, the same instruction may also contain an additional warning against damage to property. Qualified personnel according to the safety instructions of this documentation are persons authorized to commission, ground, and mark devices, systems and current circuits according to the relevant safety standards. Notes on proper use Please observe the following: Warning The device may only be used for applications specified in the catalog and the technical descriptions. Furthermore it may only be used in combination with third-party devices and components recommended or approved by Siemens. Faultless and safe operation is only ensured if the product is transported, stored, mounted and installed properly and if operation and maintenance is carried out conscientiously. Trademarks All names carrying the industrial property mark are registered trademarks of Siemens AG. The other designations in this publication may be trademarks whose use by third parties for their own purposes may infringe the rights of the owners. Copyright Siemens AG All rights reserved. This document shall not be transmitted or reproduced, nor shall its contents be exploited or disclosed to third persons without prior written consent from Siemens. Infringements will be subject to damage claims. All rights reserved, in particular in case of a patent grant of utility model registration. Disclaimer of liability Although we have carefully checked the contents of this publication for conformity with the hardware and software described, we cannot guarantee complete conformity since errors cannot be excluded. The information provided in this manual is checked at regular intervals and any corrections which might become necessary will be included in the next editions. The SIRIUS 3RW44 soft starter is an electronic motor control device for optimized starting and stopping of 3-phase asynchronous motors. The manual describes all the SIRIUS 3RW44 soft starter functions. Target group The manual is aimed at all users who deal with commissioning service and maintenance planning and configuration of plants Required basic knowledge General knowledge in the field of general electrical engineering is required for understanding this manual. Validity Definitions This manual is valid for SIRIUS 3RW44 soft starters. It contains a description of the components that are valid at the time of publication of this manual. We reserve the right to include an updated product information leaflet with new components and new component versions. If the short form 3RW44 is used in the text, it refers to the SIRIUS 3RW44 soft starter. GWA 4NEB DS 04 vii 12 Important notes Disclaimer of liability The manufacturer of the system or machine is responsible for ensuring the correct overall functioning. SIEMENS can also not assume liability for recommendations given or implied by the following description. Handling To facilitate and speed up access to special information, the manual contains the following aids: A Table of Contents is listed at the beginning of the manual. The individual chapters contain subheadings to provide an overview of the contents of the section. At the end of the manual there is an extensive index to enable you to quickly access the required information. Always up-to-date information For questions on motor starters, your regional contact persons for communication-capable low-voltage switchgear will be pleased to assist you. Please enter your suggestions for improvement, supplements and corrections and send the sheet back to us. This will help us to improve the next issue.If switched on directly, the typical current and torque behavior of the 3-phase asynchronous motor may negatively influence the feeding supply network and the load machine during start-up. Starting current 3-phase asynchronous motors have a high direct starting current I (starting). Depending on the motor version, this current may be 3 times to 15 times the size of the rated operating current. A typical value is 7 to 8 times the size of the motor rated current. Disadvantage This results in the following disadvantage Higher load on the electrical supply network. This means that the supply network must be dimensioned for this higher output during motor start-up. For the load machine, this means that the starting and acceleration forces in relation to rated operation result in increased mechanical load on the machine and the conveyed material. GWA 4NEB DS 16 Introduction Operating Mode of the SIRIUS 3RW44 Electronic Soft Starter The 3RW44 soft starter has two antiparallel thyristors in each of the phases. There is one thyristor for the positive and one thyristor for the negative half wave. Using phase angle control and various control methods, the r.m.s. value of the motor voltage is increased from a definable start voltage or start torque to the motor rated voltage within a able starting time. Example The motor current acts proportional to the voltage applied to the motor. Thus, the starting current is reduced by the factor of the voltage that is applied to the motor. The torque behaves quadratically in relation to the voltage applied to the motor. The starting torque is thus reduced quadratically based on the voltage applied to the motor. The same principle is also used during the stopping process. The effect is that the torque generated in the motor is slowly reduced, thus enabling soft stopping of the application. During this process, the frequency remains constant and corresponds to the network frequency, contrary to the frequency-controlled starting and stopping of a frequency converter. Upon completion of motor start-up, the thyristors are fully utilized, resulting in the complete network voltage being applied to the motor terminals.