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  • hellas rectifiers - Rectifier Manufacturer Netherlands
    Hellas Rectifiers BV is a full range supplier of rectifiers for all industries based on more than 60 years experience We believe in cooperation Hellas Rectifier cooperates with its customers researchers to find the best solution for their problem As we work in a electro chemical process we need both worlds to find an optimal solution We cover this gap Production We build design all rectifiers in house We are not depending on other suppliers and we understand our product Engineering We do the engineering together with our customers For us it is important to cooperate and to find the best solution for the specific application Electronics We design our own electronics to optimize the rectifiers application We do not use standard boards that you can find on the market Our slogan CUSTOM MADE IS OUR STANDARD Industries Anodizing Electronic Industries Plating Industries Cathodic Protection Water Treatment Electrolyzing hypochlorite Heating DC Foundation Direct Current BV Amstel Rectifiers Site links Home About us Contact us Our products Cathodic protection rectifiers Amstels for cathodic protection CP TR explotion proof CP TR oil cooled We assist the DC Foundation www dcfoundation org DC is the Future General information on DC www gelijkspanning nl

    Original URL path: http://www.hellas.nl/ (2015-11-02)
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  • hellas rectifiers - About Us
    We have chosen the location of our company to be in Eindhoven the innovation centre of electro engineering in The Netherlands The proximity of Technical Universities Schools and of High Tech Campus Eindhoven a technology cluster with a worldwide reputation that provides companies with advanced laboratories and technical infrastructure and an excellent working environment containing many thousands of top notch engineers makes it possible for us to exchange knowledge and cooperate This is the fuel for our engineering Our product is unique Our product is unique No customer is the same No demand is the same No working day is the same says Hassan Barraoui this makes working for Hellas really interesting Hassan who formally worked for Fokker takes mainly care of mechanics and electronics e g building servicing rectifiers Everything is tailor made Every rectifier is different One customer wants a rectifier of 1 ampere and 10x20 cm another one needs 20 000 ampere and a size of 2 00x1 80 m The demand of the customer is key This is unique Newsletter Updates Amstel products hellas products Name E mail DC Foundation Direct Current BV Amstel Rectifiers Site links Home About us Contact us Our products Cathodic protection

    Original URL path: http://www.hellas.nl/about (2015-11-02)
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  • hellas rectifiers - Rectifier Products
    plating High current water cooled Electroplating wikipedia Electrolysis EDI Electrolysis EDI Amstels for Electrolysis News and Updates Amstel products hellas products Name E mail Hellas Rectifiers Products Products for Industry Rectifiers are not a standard product That is why we have chosen to make rectifiers tailor made following your specifications Custom made is our standard In our design we maintain the following rules Simple to calibrate so no expensive production stops needed You can calibrate while producing This makes our rectifiers worthwhile Optimize power factor for reducing high transportation costs and fines by energy suppliers Thinking together with the customer to find the best cooling for each application Rectifiers must resist corrosion For bigger rectifiers we use zinc sheet steel for the frame and aluminum for the side panels We have more than 25 years of experience with micro controllers in high current environments This makes it possible to bring a lot of features to the firmware and to benefit from our improvements in our firmware DC Foundation Direct Current BV Amstel Rectifiers Site links Home About us Contact us Our products Cathodic protection rectifiers Amstels for cathodic protection CP TR explotion proof CP TR oil cooled We assist the

    Original URL path: http://www.hellas.nl/products (2015-11-02)
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  • hellas rectifiers - Cathodic Protection Products
    in mild climate environments the Amstel is the best choice for the following reasons Save on cost made to locally measuring the TR information With the Amstel series it is very cost effective to have remote control and monitoring with GSM unit Only adjustable by authorized people Very accurate Timer control with the GSM unit Easy to integrate into a pipeline management system Transformer Rectifiers for outdoor application Ambient temperature

    Original URL path: http://www.hellas.nl/products/cathodic-protection-rectifiers (2015-11-02)
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  • hellas rectifiers - Amstels for Cathodic Protection
    EDI Electrolysis EDI Amstels for Electrolysis News and Updates Amstel products hellas products Name E mail Amstel Rectifiers Amstel Rectifiers builds compact and full electronic rectifiers for the following markets Cathodic Protection Plating Industry Battery Chargers Electrolysis For more information please visit the website of Amstel Rectifiers www amstels com Sales and support of the Amstel Rectifiers are handled by Direct Current BV a sister company of Hellas Rectifiers Please contact Amstel Rectifiers for sales questions at This email address is being protected from spambots You need JavaScript enabled to view it and support questions at This email address is being protected from spambots You need JavaScript enabled to view it Amstel Rectifiers for Cathodic Protection Amstel rectifiers for optimal Cathodic Protection used in different applications Pipelines On Shore OFF Shore Storage Tanks Concrete Structures Jetties Ships Amstel Rectifiers offers a special monitoring system that is connected to the Amstel Rectifiers for a fixed monthly fee Through this monitoring system the clients are be able to view the rectifier data and adjust the configurations DC Foundation Direct Current BV Amstel Rectifiers Site links Home About us Contact us Our products Cathodic protection rectifiers Amstels for cathodic protection CP TR explotion

    Original URL path: http://www.hellas.nl/products/cathodic-protection-rectifiers/amstels-for-cathodic-protection (2015-11-02)
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  • hellas rectifiers - Cathodic Protection - TR Explosion Proof
    Zone 1 2 areas according to the 94 9 EC ATEX directive Kema Quality B V No 0344 has carried out inspections on Hellas units up to 150A and has made the following commentary EX II 2 G Eex od IIB T5 The T R units can be classified in two ways in the new approach Protection Cat Performance of protection Conditions of operation High 2 Suitable for normal operations as well as for frequently occurring disturbances or locations where faults normally have to be taken into account Equipment can be safely operated and functions in Zones 1 2 Normal 3 Suitable for normal operations Equipment can be safely operated and functions in Zone 2 The surface temperature of the Hellas units will never exceed 90 C at an ambient temperature of up to 40 C For this reason the Hellas units cannot ignite flammable gasses and vapours The Hellas units thus meet the T5 requirements Specifications Protection Performance of protection Input 220 480V 50 60 Hz 1 or 3ph Control Manual 63 step Variac Automatic Thyristor Current voltage and or potential Output Voltage Up to 100 Volt higher consult Hellas Current Up to 150 Ampere higher consult Hellas Ripple 5 for 63 step 3 phase others consult Hellas Rating Continue Protection Overload MCB or fuses Overvoltage VDR 25 kJ 8 20 µs Lighting GDT 150 kA 8 20 µs Optional Temperature Thermo switch oil temp 80 C Liquid level switch Cooling ONAN Meter DC voltage DC current Note After 30 June 2003 all transformer rectifiers purchased or put into service will have to conform to directive 94 9 EC This directive replaces the old directives regarding explosive atmospheres as well as relevant national regulations Directive 94 9 EC applies for all transformer rectifiers to be installed within the European

    Original URL path: http://www.hellas.nl/products/cathodic-protection-rectifiers/cp-tr-explosion-proof (2015-11-02)
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  • hellas rectifiers - Cathodic Protection - TR Oil Cooled
    climatological conditions such as harbours ports deserts and tropical environments Main advantages Useable for heavy duty purposes Completely sealed from environment Requires low maintenance MTBF Main Time Between Failure is very high Current up to 1500A at 55 oC environment Voltage up to 500V Our standard oil immersed transformer rectifiers can be build in every output range The Hellas standard has developed over of many years of experience and meets all the major IEC regulations BS DIN are based on IEC regulations EMC IEC 61 000 Safety IEC 60 204 Semiconductor converters IEC 60 146 Documentation IEC 60 617 Classification protecting IEC 60 529 Safety transformers IEC 60 742 Power transformers IEC 60 076 T R unit including 2 way control enclosure and junction box Specifications Protection Performance of protection Input 220 480V 50 60 Hz 1 or 3ph Control Manual 63 step Variac Automatic Thyristor Current voltage and or potential Output Voltage Up to 100 Volt higher consult Hellas Current Up to 500 Ampere higher consult Hellas Ripple 5 for 63 step 3 phase others consult Hellas Rating Continues Protection Overload MCB or fuses Overvoltage VDR 25 kJ 8 20 µs Lighting GDT 150 kA 8 20 µs Optional

    Original URL path: http://www.hellas.nl/products/cathodic-protection-rectifiers/cp-tr-oil-cooled (2015-11-02)
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  • hellas rectifiers - Cathodic Protection Wikipedia
    hull below the waterline and dramatically reduced the corrosion rate of the copper However a side effect of the CP was to increase marine growth Copper when corroding releases copper ions which have an anti fouling effect Since excess marine growth affected the performance of the ship the Royal Navy decided that it was better to allow the copper to corrode and have the benefit of reduced marine growth so CP was not used further Davy was assisted in his experiments by his pupil Michael Faraday who continued his research after Davy s death In 1834 Faraday discovered the quantitative connection between corrosion weight loss and electric current and thus laid the foundation for the future application of cathodic protection Thomas Edison experimented with impressed current cathodic protection on ships in 1890 but was unsuccessful due to the lack of a suitable current source and anode materials It would be 100 years after Davy s experiment before cathodic protection was used widely on oil pipelines in the United States CP was applied to steel gas pipelines beginning in 1928 and more widely in the 1930s Types Galvanic In the usual application a galvanic anode a piece of a more electrochemically active metal is attached to the vulnerable metal surface where it is exposed to the corrosive liquid Galvanic anodes are designed and selected to have a more active voltage more negative electrochemical potential than the metal of the target structure typically steel For effective CP the potential of the steel surface is polarized pushed more negative until the surface has a uniform potential At that stage the driving force for the corrosion reaction with the protected surface is removed The galvanic anode continues to corrode consuming the anode material until eventually it must be replaced Polarization of the target structure is caused by the electron flow from the anode to the cathode so the two metals must have a good electrically conductive contact The driving force for the CP current is the difference in electrochemical potential between the anode and the cathode Galvanic sacrificial anode attached to the hull of a ship showing corrosion Galvanic or sacrificial anodes are made in various shapes and sizes using alloys of zinc magnesium and aluminium ASTM International publishes standards on the composition and manufacturing of galvanic anodes In order for galvanic cathodic protection to work the anode must possess a lower that is more negative electrochemical potential than that of the cathode the target structure to be protected The table below shows a simplified galvanic series which is used to select the anode metal The anode must be chosen from a material that is lower on the list than the material to be protected Metal Potential with respect to a Cu CuSO 4 reference electrode in neutral pH environment volts Carbon Graphite Coke 0 3 Platinum 0 to 0 1 Mill scale on Steel 0 2 High Silicon Cast Iron 0 2 Copper brass bronze 0 2 Mild steel in concrete 0 2

    Original URL path: http://www.hellas.nl/products/cathodic-protection-rectifiers/cathodic-protection-wikipedia (2015-11-02)
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