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With zero crossing burst firing, there is reduced electromagnetic interference EMI and no harmonic disturbance to the supply. Such a standard system layout will decrease engineering efforts, spare parts and overall system cost Figure Even if, as is usual with thyristors, the state is left. Open the catalog to page 4.
With respect to multiple boosting electrodes zones, running controllable power on thuristor pair of electrodes makes the whole boosting system more flexible and avoids hot spots, especially in so called barrier boosting zones, in which multiple electrodes are lined up to improve fining by energizing the glass flow loops see Figures 11 and The benefits of two-leg versus three leg power control, in three phase heating applications. If the thyristor unit in this circuit is off, the e.
Automatically, the electrodes located in the hottest part of the zone will have the lowest resistance and will therefore introduce more power compared to ones that are running in a colder part of the zone. Water Cooled Transformers Water Cooled transformers allow for several advantages in the system. Customer support Technical helpdesk. Open the catalog to page 7.
This can occur where secondaries are not, in fact, galvanically isolated. Advantages of a multiple zones boosting system In an SCR controlled dual transformer designed boosting system, we try to use as many relatively small sub systems as possible.
To cope with this, a technique of burst firing with delayed first cycle firing has been developed. With those transformers the power could only be controlled in several fixed and predefined steps and in many of these applications the transformers primary high voltage had to be switched off before the secondary taps could be switched.
With no moving parts to wear they offer high reliability, and long life. Phase angle firing typically degrades the power factor while increasing harmonics and electrical noise.
Smart thyristor control for electric boost
These products can take inputs from discrete controllers and plcs and have a wide range of full wave, half wave and phase angle firing modes to suit all load types. If in difficulty, the designer would be well advised to seek expert assistance from manufacturers with considerable applications experience.
In an SCR controlled dual transformer designed boosting system, we try to use as many relatively small sub systems as possible. Find out about our solutions for:.
EPower™ Controller
Of course the incoming high line voltage and the maximum electrode voltage cannot be changed, thus the only solution possible to work around these two fixed values is to run the boosting control system at the highest possible thyristr and lower that voltage to the desired boosting electrode voltage as close as possible to the electrodes.
Power Control Our range of power controllers can drive complex and transformer coupled loads. All the precautions necessary when using single-phase transformers are necessary in the case of multi-phase installations.
Example trade name Nikrothal. Thus, the long distance running current is reduced by 2.
Thyristor Selection - EUROTHERM PROCESS - PDF Catalogs | Technical Documentation | Brochure
Improved SCR control To overcome these issues and be able to profit from the advantage of a solid-state two transformer designed boosting system, we introduced load tap changing.
Easy ordering, configuration and maintenance through modular design If your requirements change EPower controller can be easily adapted to meet your needs Minimum spares holding - many options configurable through a common driver module e. The EPower controller uses the newest technologies and innovations to manage your process and reduce your energy costs. Eurotherm offer an on-site advisory service in the choice of suitable thyristors.
Harmonics distortion is equally reduced with LTC which also contributes to less reactive power and therefore improved efficiency.
Published in Glass Worldwide, Eurottherm thyristor control for electric boost There are many ways of controlling the electrical power of a furnace boosting system. Negative power control effects caused by incoming power fluctuations are difficult to control with such systems and therefore those incoming line fluctuations could have a direct and relatively quick and uncontrollable effect on glass temperatures.
New power knowledge white paper. Thyristod distance between the transformer and the furnace is therefore relatively long.
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