GENERAL CATALOGUE NAFSA
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GENERAL CATALOGUE

About us The company In NAFSA S.L. we have a long experience in the design, manufacture and sale of all types of industrial solenoids, holding electromagnets and electromagnetic locking bolts. Since its founding in 1996 NAFSA has been characterized by offering to it´s customers customized solutions. A large part of our production consists of electromagnets designed specifically for customers or adaptations of standard models. Main production centers In Nafsa we have two production centers. The headquarters are in Gernika-Spain and since 2009, we join with Ingeniería Magnética Aplicada (IMA)...

Simple effect double coil linear solenoids 6. ERD SERIE: 6.1. ERD60-05/C Reversible linear solenoids: 7. SERIE ECR: 7.0. ECR Introduction 7.1. ECR Working intruction and electrical connection 7.2. ECR Force-stroke chart 7.3. ECR40-07 7.4. ECR50-16 7.5. ECR65-15 7.6. ECR72-30 7.7. ECR90-25 Bistable solenoids: 8. SERIE ERB: 8.0 ERB Introduction 8.1. ERB35/N 8.2. ERB50/N Reversible bistable solenoids: 9. ERDI SERIE: 9.1. ERDI15 Linear bistable solenoids: 10. ECI SERIE: 10.1. ECI30 10.2 ECI35 Electrical locking bolt: 11.1. ER30/CCR 11.2. CU30/CP 11.3. C30 11.4. CU20/CP Holding electromagnets:...

Technical explanation: Push and pull electromagnets Every product made by NAFSA fulfills the European Directive 2006/95/CEE about the electrical appliances and certain voltage limits. Made according to the following norms: DIN VDE0580, UNE-EN 60204-1, NFC79300. BASIC CONCEPTS VOLTAGE, CURRENT AND POWER Standard Voltage (Un): This is the value supposed for the solenoid correct performance. A variation between +5% and -10% is admitted. Magnetic Force (Fm): It is the force developed by the solenoid measured in the stroke direction. Effective Force (Fh): It is the magnetic force (Fm) after...

Technical explanation: Push and pull electromagnets PERFORMANCE CYCLES PERFORMANCE CONDITIONS Time with voltage Time without voltage Open of the power circuit Close of the power circuit Continuous operation: The duration of the solenoid on is so long that the performance temperature is achieved . For this kind of performance, solenoids with 100% duty-cycle (ED) must be selected. Cycle time Time with voltage: Time passed between connection and breaking. Time without voltage: Time passed between breaking and connection. Cycle time: Time passed adding the time with voltage to the time without...

Technical explanation: Push and pull electromagnets TEMPERATURE AND INSULATION Insulation class: It is the limit temperature of the materials used when a solenois is manufactured.In general terms, thermal class B insulation is used (130ºC). A variation of 5K is admited in the reference temperature. Under demand, they can be manufacture in thermic class F or even H. Difference between hot points DV34 (ºC): It is the difference between the medium and top temperature of the coil. Graphic of the temperatures: The temperatures are in ºC and the temperature differences in K=5ºC. Insulation...

Technical explanation: Holding electromagnets Every product made by NAFSA fulfils the European Directive about electrical appliances and certain voltage limits. Made according to the following norms: DIN VDE 0580, UNE-EN 60204-1 y NFC79300 Holding electromagnets TYPES Electropermanent holding electromagnets with incorporated magnet: The attraction and holding of the ferromagnetic material is made by permanent magnets incorporated in the product. It has not got any plunger, its magnetic circuit is opened. Apart from the permanent magnets there is a coil mounted in, when this is fed, cancels...

Technical explanation : Holding Electromagnets. Figure 1 Attraction face Magnetic circuit opened Magnetic poles Air gap Holding force Lateral motive force Optimun thickness of the piece to hold Magnetic flux Magnetic circuit closed by the piece to hold Magnetic flux F: These electromagnets generate on the surface of the piece to hold a magnetic field between North and South poles. When the piece to hold is near the magnetic circuit is closed so the magnetic flux increases. The number of force lines per cm2 that crosses perpendicular to the surface is the flux density as well called magnetic...

Technical explanation: Push and pull electromagnets PRECAUTIONS TAKING INTO ACCOUNT IN THE SOLENOID MANIPULATION AND INSTALLATION VARIATIONS IN THE VOLTAGE: Admited variations on the standard voltage are +5% and -10%. The value of the standard voltage appears in the data label of the solenoid. Insufficient power supply: If the power supply designed to feed the solenoid has less power than the demanded for the same, the force will be less than that specified in the technical data sheet. Measures to be taken: Ensure that the power supply has higher power available than the one demanded by the...

Technical explanation: Push and pull electromagnet PRECAUTIONS TAKING INTO ACCOUNT IN THE SOLENOID MANIPULATION AND INSTALLATION POLARIZED COIL CONNECTION: In solenoids with magnets system is needed to polarize properly the coil such as ERB, ERDI, ECI VM and VM / ND series. Example: Working depending on the feeding mode, ERB serie. Locked position Unlocked position Red cable: +Vdc Black cable: -Vdc Red cable: -Vdc Black cable: +Vdc (F-S) Coil+magnet (F-S)Spring F-S:Force-stroke FREQUENCY OF USE IN NUMBER OF CYCLES (only for the solenoids, the holding magnet are exempt) : The number of...

Working principles Simple-effect linear solenoids ER SERIE: Displacement with voltage Work: pull Work: push Position with voltage Displacement without voltage,by external forces or by a spring ERD SERIE: Simple effect double coil linear solenoid 1 Displacement with voltage by pulse coil Work: pull Pulse coil ECR SERIE: Reversible linear solenoids. External switch Position with tension, held by holding coil. 4 Displacement without volatge, by external forces or by spring ERB SERIE: Bistable solenoids. Coil 2 under voltage Held position by magnets, without voltage Held position by magnets and...