deutsch / english
Contact us 04.09.2012 | GWHD 500 - The intelligent DC/DC Converter
Smart Grid needs Intelligent Solutions
The determining factors that govern the energy-supply sector and its associated distribution requirements are all undergoing sweeping changes. The modernisation of power, gas and water-supply networks is a pending future task, and there is a demand for flexible systems designed to provide the required remote-management, safety and control technology.
Anyone concerned with the planning and design of nodal points for energy-supply networks (i.e. the management of networks, safety systems or metering) need to have access to technology that is both thoroughly tried-and-tested and suitable for meeting future requirements.
Varying load distribution and decentralisation are particularly likely to have an important influence over the service life of components in backup systems, such as those based on DC UPS devices.
The robustness of components has usually been defined, up to now at least, in terms of the ability of the items selected to withstand general environmental factors, and thus ensure a long service life.
Where performance was concerned, it was normally enough to know a system’s MTBF (Mean Time between Failure).
The questions to ask when it comes to today’s decentralised networks, which often have to handle load factors that are totally different to anything encountered so far, should in fact be: What actually happens inside the system? What effect do fluctuations in the network have on the UPS system? How many load variations is the system being subjected to? The task of monitoring has merely consisted, up to now, of determining whether the connected components are working, and that no error messages are being generated.
Zentro-Elektrik is now breaking new ground in this respect, with its innovative GWHD 500 digital DC/DC transformer.
Zentro’s team of development engineers set itself the task of creating an intelligent system capable of providing detailed status information on transformers and the items supplied by them, going way beyond the system of error messages used previously.
...more
Anyone concerned with the planning and design of nodal points for energy-supply networks (i.e. the management of networks, safety systems or metering) need to have access to technology that is both thoroughly tried-and-tested and suitable for meeting future requirements.
Varying load distribution and decentralisation are particularly likely to have an important influence over the service life of components in backup systems, such as those based on DC UPS devices.
The robustness of components has usually been defined, up to now at least, in terms of the ability of the items selected to withstand general environmental factors, and thus ensure a long service life.
Where performance was concerned, it was normally enough to know a system’s MTBF (Mean Time between Failure).
The questions to ask when it comes to today’s decentralised networks, which often have to handle load factors that are totally different to anything encountered so far, should in fact be: What actually happens inside the system? What effect do fluctuations in the network have on the UPS system? How many load variations is the system being subjected to? The task of monitoring has merely consisted, up to now, of determining whether the connected components are working, and that no error messages are being generated.
Zentro-Elektrik is now breaking new ground in this respect, with its innovative GWHD 500 digital DC/DC transformer.
Zentro’s team of development engineers set itself the task of creating an intelligent system capable of providing detailed status information on transformers and the items supplied by them, going way beyond the system of error messages used previously.
...more
24.04.2012 | battery chargers (Pb, LiIon, LiMg, LiPolymer, etc.)
Charging technology for high-performance storage batteries
Founded in Germany 1956, Zentro-Elektrik develops and manufactures electronically-controlled power supply systems – specialising in power electronics (from approx. 20 W to 100kW). The items developed and manufactured also include battery chargers (Pb, LiIon, LiMg, LiPolymer, etc.). Given current trends in the electric-vehicle sector, intensive work in recent years has been concerned with the charging of high-performance storage batteries. . . powering anything from electric boats to enduro motorcycles, with customers reporting output of 30 PS, or the equivalent of a conventional 125 cc two-stroke engine, with an end-user price of approx. €10.000,-- Englisch ...more
29.06.2011 | HMI 2011
Zentro-Elektrik in the field of renewable energy
As in previous years, Zentro-Elektrik was represented with its exhibition stand in the Fuel Cells exhibition section. Customers were particularly interested in all aspects of their products for solar technology and battery charging and battery testing systems.
In the forum Zentro-Elektrik presented the Intelligent Harvester, a battery charger which is designed for the operation of solar panels independently of the mains. Parallel operation permits entire fields to be equipped. This device stands out thanks to its very high efficiency and flexibility in the choice of battery types (fuel cell or Li-Ion battery).
Zentro-Elektrik showed Li-Ion battery chargers in the 230 and 350 Watt power ranges e.g. for e-bikes/e-mobility applications.
Zentro offers both 0 Volt loads and digital loads (60V - 800V) for equipping test benches for testing single fuel cells.
In particular, the discussion about smart grid technologies demands frequent updating/replacement of components in a medium-voltage power grid. Zentro showed digital transducers for this purpose.
An interesting exhibition week is drawing to a close – Here is our résumé:
The modernisation of mains grids, the use of new charging concepts and the testing technology required for these are the themes of the future. The specialist discussions at the exhibition were rewarding for us. Competence packed into the smallest space! ...more
In the forum Zentro-Elektrik presented the Intelligent Harvester, a battery charger which is designed for the operation of solar panels independently of the mains. Parallel operation permits entire fields to be equipped. This device stands out thanks to its very high efficiency and flexibility in the choice of battery types (fuel cell or Li-Ion battery).
Zentro-Elektrik showed Li-Ion battery chargers in the 230 and 350 Watt power ranges e.g. for e-bikes/e-mobility applications.
Zentro offers both 0 Volt loads and digital loads (60V - 800V) for equipping test benches for testing single fuel cells.
In particular, the discussion about smart grid technologies demands frequent updating/replacement of components in a medium-voltage power grid. Zentro showed digital transducers for this purpose.
An interesting exhibition week is drawing to a close – Here is our résumé:
The modernisation of mains grids, the use of new charging concepts and the testing technology required for these are the themes of the future. The specialist discussions at the exhibition were rewarding for us. Competence packed into the smallest space! ...more
10.08.2009 | Power 3000Watt
Microcontroller based – digitally controlled DC Load Electronic DC Load
Zentro-Elektrik is announcing topically with its electronic DC load series DCL3000 a load for highest demands.
In not more than 3 U of a 19” rack, the power pack delivers 3000Watt. This was only possible to achieve by choosing the most demanding and available semiconductors and by an optimized construction combined with fast monitoring and regulation.
The controller is a fully digital PID controller with 100 kHz Sample rate with 16bit resolution of set point and 24bit resolution of actuating variable. The innovative controller design with automatically offset correction achieves an excellent accuracy of 0.2% of max. load current combined with extremely short transient time. ...more
In not more than 3 U of a 19” rack, the power pack delivers 3000Watt. This was only possible to achieve by choosing the most demanding and available semiconductors and by an optimized construction combined with fast monitoring and regulation.
The controller is a fully digital PID controller with 100 kHz Sample rate with 16bit resolution of set point and 24bit resolution of actuating variable. The innovative controller design with automatically offset correction achieves an excellent accuracy of 0.2% of max. load current combined with extremely short transient time. ...more
06.11.2008 | digital DCDC converter, Microcontroller
Microcontroller based digital DC/DC converter from Zentro-Elektrik
As follow-up models to the successful GWH500 converter series, the models of the GWHD500 series have been provided with a lot of intelligence by using two 16-bit digital signal processors (DSP). The use of two communicating DSPs (one DSP each for primary and secondary circuit) does not only permit the digital control of the output voltage or the output current, respectively, but in addition digital signalling in the inverse feedback using digital magnetic couplers instead of conventional opto-couplers. In this way a maximum degree of digitalisation is achieved, i.e. less analogue switching components are required and the number of component parts is reduced. This reduces the susceptibility to failure and reliability is increased by a considerable degree. ...more
06.11.2008 | ACDC power supply / battery charger
Power supplies / battery chargers with wide-range output and analogue control
With the ZAT800-3000 series, Zentro-Elektrik offers power supplies with outputs of 800 W, 1600 W and 3000 W. Wide-range input from 70 … 264 VAC or 70 … 369 VDC and wide-range output depending on the nominal output voltage of 0 … 18 VDC to 0 …320 VDC, analogue interface 0 … 5 VDC, temperature compensated charge, sense line (option), power fail alarm, master slave operation with RS232 bus … only some of the many functions of the device series. ...more
06.11.2008 | ACDC power supply, DIN rail and wall mounting
AC/DC power supply for DIN mounting rails and wall mounting
The synchronised AC/DC power supplies of the ZAT series manufactured by Zentro-Elektrik can be used as power supply units or as battery chargers. The robust reliable devices have been designed for use in telecommunications and industry. ...more
06.11.2008 | Laboratory power supply, high-performance
High-performance laboratory power supply up to 2,400 Watt
The DC laboratory power supply of the ZAS series manufactured by Zentro-Elektrik is a flexible AC/DC power supply series of high power density for OEM, industry and laboratory application. Built in keeping with the principles of the “zero voltage soft switching technology”, with digital coding of the voltage and power settings, automatic mode switch between constant current / constant voltage, parallel switching with active current sharing, the devices offer a power range of between 600 W, 1,000 W, 1,200 W and 2,400 W and supply output voltages of between 0 … 20 VDC and 0 … 120 VDC in every power range, depending on type. ...more
06.11.2008 | Battery charger for Li Ion, accumulators
Battery charger for Li Ion / Li Mg / Li Polymer accumulators
The battery charger series CH 95 manufactured by Zentro-Elektrik has been developed especially for charging lithium batteries. The series supplies a power of 350 W at output voltages of between 30 … 60 VDC switched mode technology. Internally, it contains intelligence based on a micro-controller which recognises the respective type of accumulator, adapting the charger to the respective charging curve and application. The battery chargers are made of components of highest reliability. The water-proof IP65 housing, the wide range of operating temperatures from -25° to +70°C, convection cooling, few discharge currents, and the scratchproof outer make the device withstand the rough conditions in ship construction, yacht building and in small electric vehicles. ...more
06.11.2008 | frequency converter, AC Source
AC voltage source and frequency converter
AC voltage source and frequency converter in one unit has been developed by Zentro-Elektrik to provide AC voltage as required by the public networks in most countries. The requested frequency of the output voltage can be selected. The devices are available in the output classes 500 VA, 1000 VA and 2000 VA. The respective voltage can be set between 0 and 270 VAC by a potentiometer on the front plate. ...more
06.11.2008 | Electronic precision DC load
Electronic precision DC load for small load currents
Where universal loads are highly inaccurate, i.e. in the range of low load currents < 10 A, the electronic DC load “ELA Precision” provides the highest of resolution and accuracy. Typically the working area ranges between a load current of < 1 A and 8 A and a load voltage of between 0.35 VDC and 160 VDC, at a maximum load power of 250 Watt.
The high resolution of the low load current in a load voltage range of over 0.35 VDC is suitable for a number of fields, in particular for applications in research and development as well as testing of solar cells and fuel cells. ...more
The high resolution of the low load current in a load voltage range of over 0.35 VDC is suitable for a number of fields, in particular for applications in research and development as well as testing of solar cells and fuel cells. ...more
06.11.2008 | DC UPS
Uninterruptible DC power supply (DC UPS)
The reliable supply, i.e. the power supply without interruption and disturbances, is absolutely essential today in many fields, in particular in case of complex processes. DC UPS systems are indispensable in automation engineering, process and plant engineering, telecommunications, traffic and control engineering, utility facilities, to mention only a few. ...more
06.11.2008 | ACDC power supply, convection cooled
AC/DC power supply Convection cooled – short-term up to 145% power at > 70°C operating temperature
The extraordinarily powerful AC/DC power supply unit which supplies up to 145% output power for a short time up to the point of temperature-controlled shut-down at 95°C is another device series marketed by Zentro-Elektrik, which supplements the reliable and robust well-known AC/DC and DC/DC power supply units. ...more
06.10.2007 | DC UPS
DC – UPS Systems for Safety Relevant Installations
With their modular construction, the latest DC – UPS systems in the GTLB/GTPB series from Zentro Elektrik expand the existing comprehensive range of DC – UPS systems for supplying power to safety relevant installations. ...more
06.10.2007 | DC/DC converter DIN rail and wall mounting
Compact DC/DC converters for DIN rail and wall mounting
At 100 Watt and 500 Watt the DC/DC converters from Zentro Elektrik extend the existing comprehensive range of converters ...more
06.10.2007 | Electronically DC load
Electronically controlled DC load for wide range load voltage
The latest electronically controlled DC loads from Zentro Elektrik have an output power up to 250 Watt or 500 Watt. ...more
06.10.2007 | Modular DC/DC Converter Stack
Modular DC/DC Converter Stacks
The modular DC/DC Converter D1000 offers up to 1000W of DC power from vehicle or other mobile or static DC power sources. ...more