13 GenIIIe and 15 GenIV Siemens ROBICON Perfect Harmony VFD 350 to 5500 hp to power its fans, rolling mill drives and furnace drives.

Ste in Holcim. The VFD of the Genevieve plant in Wisconsin, Michigan meets the performance in harsh environments. American Holcim operates the world's largest single-kiln cement production line: Ste. The Genevieve plant is in Missouri. When the facility was commissioned in 2009, it required 28 large variable frequency drives (VFDs) with a power rating of 350 to 5500 hp to power its fans, rolling mill drives and furnace drives.

Ste. Genevieve can produce hundreds of tons of cement per hour at an operating temperature of 2,500 F. Siemens needs to ensure the reliability of this critical application and implement the solution without affecting factory output and efficiency.

Siemens worked with Holcim Ste. Ken Walden collaborated. Genevieve's electrical manager has developed a configuration that can meet the needs of this harsh environment. Siemens recommends the use of 13 GenIIIe VFDs with redundant battery levels and 15 GenIV VFDs.

These drives have a power supply voltage range of 4,160 to 13,800 V, with advanced battery bypass, input contactor/switch device and electronic door interlock functions. Siemens provided factory acceptance testing, commissioning, on-site training and important spare parts packages.

In addition, Siemens worked with the plant to ensure that operations remain online during startup and commissioning to avoid production delays.

result

Siemens ROBICON Perfect Harmony driver by Holcim Ste. After debugging, Genevieve showed excellent reliability and efficiency. The drive requires very little passive maintenance, allowing the factory to produce large amounts of cement.

Walden said: "Because of the manufacturer's reputation as well as the drive's reliability, innovative design, American-made state and price, we chose Siemens ROBICON Perfect Harmony VFD." "And they live up to their reputation. We are absolutely right. select."

benefit

Advanced Cell Bypass (advanced battery bypass) allows the drive to bypass any battery during operation, while maintaining the complete output voltage. Benefits include:

Broad compatibility. The IGBT-based topology can precisely adjust the voltage and output power range of the driver.

Improve energy efficiency. Synchronous transmission can reduce the pressure on the grid and equipment during the simultaneous start of the motors.

Reduce the total cost of ownership. More than 50 technologies reduce downtime, improve energy efficiency, and limit wear and tear-extending the life of the drive to 20 years.

Fast and reliable customer service. The true medium voltage drive technicians provide support throughout the life cycle, from quotation, commissioning and on-site training to 24/7/365 call center support and nationwide on-site service.

The Siemens ROBICON Perfect Harmony drive has a series of linked low voltage batteries that can form the medium voltage power output of the drive system. With this topology, the driver can be precisely adjusted for various voltages and output power.

The company stated that its ability to bypass any battery while maintaining full output voltage during operation provides unparalleled availability and reliability. The integrated transformer with phase-shifted secondary eliminates the need for input harmonic filters or power factor compensation.

This results in the output voltage being so close to the ideal sine wave shape that almost any type of motor (old or new, low speed or high speed) can be operated without any additional stress. The reliability of the drive has been further supported by the US field support. F

Information is provided by Siemens Industries Ltd.