Rale Transformer Design Software 18
This transformer was designed for 6% overvoltage. In order to arrive at the nominal data for this transformer design, test thedesigned transformer at the nominal input voltage in the test program (Uin = 1 ).
Rale Transformer Design Software 18
Using the RALE distribution and power transformer design software and/or inductor design software can improve both your quality of life and your company profit because the RALE distribution and power transformer and inductor design software is world's best design software for power transformers and inductors.
Thirty years ago, designers performed the calculations for transformers on their pocket calculators. The designer had to pencil all the input and output fields into a form and then feed them into the calculator. Today, he can forget the pencil, but he needs to enter the figures into spread-sheet programs such as Excel and Lotus 123.
Once the first economical 8-bit computer had become available in 1978, professionals could begin to develop programs for designing transformers and inductors. This development work moved in two directions:
The Rale Design Software automatically calculates designs for transformers and inductors. Consequently, its database incorporates all the necessary materials including cores, bobbins, wires, steels, etc. in both metric and USA units. This database is totally user expandable. To use the programs, the designer needs only a basic knowledge of transformers or inductors and their operation mode. The designer does not need to use any complicated formulas, he only needs to follow two simple phases:
A large number of well-known transformer manufacturers do protect their non-short-circuit proof transformers with inert T miniature fuses with low breaking capacity, designing them in test mode with Ttest = 2 minutes and K = 2.1. Transformers designed in this way overheat during operation at 1.5 times nominal fuse current for 60 minutes to way above the permitted temperature. For this reason either IEC 127 needs to be expanded by adding the value that exists at 1.5 x fuse nominal current (Ifnom) , or IEC 61558 paragraph 15.3.3. should be redrafted.
The transformer usually has a primary and secondary coil on each leg. All the coil connections are accessible from the exterior and are used for serial and parallel circuits. The first picture in figure 3 shows the serial circuit. The ampere turns of the primary and secondary coils are compensated. If the transformer is used as shown in pictures 2 and 4, the ampere turns per leg are not compensated and the transformer diffuses a magnetic field that is 5-10 times greater. Picture 3 shows the design and internal wiring of the secondary coils at which the ampere turns always remain compensated.
It can be clearly seen that the transformer that was designed in accordance with test mode K=2.1 / Ttest=2 Minutes, and in operation under test mode K=1.5/Ttest = 60 minutes, will exceed the over-temperature by a factor of some 1.5.
Accuenergy manufactures and designs industrial power and energy meter solutions. This also includes a variety of current transformers, hall effect sensors, energy management software, data acquisition communications devices, and much more.
We provide a wide variety of power supply solutions. From switched mode and industrial uninterruptible power supplies to transformers, every product is designed for reliability and dependable operation.
Our Global Control Circuit Transformers are designed to reduce supply voltages to control circuits, providing greater safety to operators. IP2X finger-safe terminal covers and fuse covers are provided on all units for added workplace safety. Our transformers isolate the control circuits from power and lighting circuits. They accommodate the momentary current inrush caused when electromagnetic components are energized, without sacrificing secondary voltage stability per NEMA ICS2-100.
Bulletin 1497A Machine Tool Transformers (50/60 Hz) are designed to reduce supply voltages to control circuits. The complete line of transformers is available with optional factory-installed or panel-mount primary and secondary fuse block/clip.
Bulletin 1497B Control Power Transformers (60 Hz) are designed to reduce supply voltages to control circuits. The complete line of transformers is available with optional factory-installed or panel-mount primary and secondary fuse block.
Abstract:Tramway systems are more and more diffused today, to reduce pollution and greenhouse emissions. However, their electrical feeding substations can have significant margin for improvement. Therefore, it is questionable which kind of changes can be introduced, by changing their main features. First of all, transformer technology can be enhanced, by moving from the standard transformer to the amorphous metal one; thus, guaranteeing a significant reduction in losses. Then, by installing one dedicated storage systems for each substation. This solution can help to increase the energy efficiency; thus, recovering the tram braking energy and reducing the delivered energy from the grid, and also the reliability of the system; thus, guarantee different levels of services, in the case of failure of a feeding substation. This paper investigates in a systematic approach the two proposed solutions. In particular an amorphous metal transformer has been properly designed, and performance compared to the standard one. Then, evaluation of distributed storage installation was performed, and the aspects of reliability for these systems evaluated. Results have shown the general feasibility of the proposed solutions, showing a significant energy saving with respect to the conventional ones.Keywords: amorphous transformer; energy storage; failure; feeding substation; tramway
When this suggestion wound its way to EMD Engineering, Tim Keck (EMD Manager of Systems Engineering at the time), posed that question to myself and others. We all realized that one of the two TCCs[2] of a SD70MAC might be modified to provide HEP, leaving the other TCC and truck to propel the unit (and the other truck just coasting). Consultations with our counterparts at Siemens confirmed that yes, EMD and Siemens could adapt the HEP transformer previously designed for the LIRR DE/DM30AC locomotive with the inverter of the SD70MAC to provide 480V 3-phase HEP.
With the CSX Tier-1 70MAC design complete, EMD realized that the CSX APU space could easily morph into a location for an Alaska HEP system without shortening the fuel tank and without slinging transformers and equipment underneath the loco. This proposal was offered up to Alaska in the spring of 2003.
Fortunately, the conservatism in the HEP blower design paid off here. As EMD was uncertain of the pressure vs volume characteristics of the repackaged HEP transformer, the air flow engineer over-designed the HEP blower. Thus, there was plenty of static pressure for the air filter and still allow for sufficient cooling air thru the transformer.
The SD70MAC-HEP units arrived in Alaska in April and May 2004 and immediately started pulling freight and passenger trains (with HEP provided by other means). HEP transformers were installed in September-December 2004. EMD and Siemens engineers arrived in October 2004 to test and commission the HEP software. Limited runs with the HEP system running were made on our weekend Aurora trains starting in January 2005. After correcting one extremely annoying software bug in the spring, the units entered day-in/ day-out on May 15th of the same year. I see no reason to expect them not to be running 20 years from now (Figure 21).
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