The smallest and most cost-effective air-cooled medium voltage VFD Siemens perfect harmony GH180-520

I want to introduce you to the smallest and most cost-effective air-cooled medium voltage VFD on the planet. Siemens perfect harmony GH180-520.

Harmony But some history about Perfect Harmony medium voltage VFD. In 1994, Robicon introduced the first voltage cascaded "H" bridge Perfect Harmony driver (Siemens purchased Robicon in 2005). In short, it completely changed the medium voltage drive market. Since then, more than 14,000 Perfect Harmony drives have been sold worldwide! This is a medium voltage VFD topology with more drivers than any other invention!

What makes the "perfect harmony" drive so special? The Perfect Harmony Drive has many inherent characteristics, and they are unique. Comply with IEEE-519 standard, without filter, even at 2000 feet of motor cable length, motor-friendly sinusoidal output does not require a filter, high efficiency, power conversion capability-input and output voltage do not need to be the same, integrated input isolation transformer- Three incoming wires/three outgoing wires are tested on the factory floor as a complete component. Even if the input voltage drops by 30%, the drive can continue to run.

Although these achievements were important achievements for the medium voltage VFD at the time, what makes Perfect Harmony stand out in today's competition is the patented Advanced Cell Bypass option. This amazing innovative feature allows Perfect Harmony drives to continue to operate even if the switching component fails. This option increases the MTBF (Mean Time Between Failure) from the industry-leading 55,000 hours to more than 110,000 hours! Although I am sure you think this option must cost a fortune, the truth is that the Advanced Cell Bypass option is very affordable and offers great value to the owner.

Now back to the current topic-the new GH180-520 Perfect Harmony VFD

This new medium voltage frequency converter has the same topology and the same functions as the Perfect Harmony products that have been marketed since 1994.

For the new 520 series VFD with rated power up to 500HP (70FLA @ 4000V), it provides a cost-effective alternative to the use of low-voltage solutions and has all the advantages of a medium-voltage driver. With our patented advanced battery bypass option, it has ultra-high reliability, lower initial capital expenditure (especially considering the difference in power and motor cable costs between 480V and medium voltage), higher efficiency, and lower input voltage The power conversion capability of 480V to 7.2kV and any combination of 2.4kV to 4kV rated output power! Yes, I said 480V input is an option! But here is kicking............ It is only 48" wide! (102" H x 48" W x 40" D)

To put this figure clearly, the 500HP GH180-520 is 20 inches narrower than our Siemens 18 pulse 480V W150CP VFD!

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