Variable Frequency Drive
Clean input power: The Siemens Perfect Harmony GH180 3500 HP VFD with 6900 Volt features a clean input power, which helps to protect the drive and the electrical system from disturbances. This is achieved through the use of a filter that removes harmonics and other unwanted transients from the input voltage. This helps to extend the lifespan of the drive and the electrical system, and it also reduces noise and vibration.
Sinusoidal output power (waveforms): The Siemens Perfect Harmony GH180 3500 HP VFD with 6900 Volts produces sinusoidal output power waveforms, which are gentle on motors and other equipment. This helps to extend the lifespan of motors and other equipment, and it also reduces noise and vibration. Additionally, the sinusoidal output power waveforms help to improve the efficiency of the drive and the motor, which can save energy costs.
Maximized availability: The Siemens Perfect Harmony GH180 3500 HP VFD with 6900 Volts is designed for maximum availability, with features such as cell bypass and cell redundancy. Cell bypass allows the drive to continue operating even if one or more power cells fail. Cell redundancy provides additional protection against failures by allowing the drive to continue operating even if two power cells fail. This helps to ensure that the drive will be available even if there are problems with the electrical system.
Extended reliability: The Siemens Perfect Harmony GH180 3500 HP VFD with 6900 Volts is built with proven components and technologies, which helps to extend its lifespan. The drive also features a number of features that help to protect it from damage, such as overvoltage protection and thermal protection. These features help to ensure that the drive will last for many years without any significant problems.
Exceptional input line performance: The Siemens Perfect Harmony GH180 3500 HP VFD with 6900 Volts has excellent input line performance, which helps to reduce harmonics and improve power quality. This is achieved through the use of a filter that removes harmonics and other unwanted transients from the input voltage. The drive also features a number of other features that help to improve power quality, such as a voltage sag compensator and a reactive power compensation function. These features help to ensure that the drive will not cause any problems with the electrical system, and they can also help to reduce energy costs.
Ease of installation and maintenance: The Siemens Perfect Harmony GH180 3500 HP VFD with 6900 Volts is easy to install and maintain, thanks to its modular design and intuitive user interface. The drive also features a number of features that help to simplify installation and maintenance, such as a built-in diagnostic system and a remote maintenance function. These features help to reduce the time and cost of installation and maintenance, and they also help to ensure that the drive will be operating correctly.
Drive topology: The Siemens Perfect Harmony GH180 3500 HP VFD with 6900 Volts uses a cell-based topology, which makes it scalable and flexible. This means that the drive can be easily scaled up or down to meet the specific needs of the application. The cell-based topology also makes the drive more reliable, as it allows for the failure of individual cells without affecting the overall operation of the drive. This helps to ensure that the drive will be able to meet the needs of the application, even if there are changes in the future.
Proven IGBTs: The Siemens Perfect Harmony GH180 3500 HP VFD with 6900 Volts uses proven IGBTs, which are known for their reliability and efficiency. IGBTs are a type of semiconductor that is used to switch high voltages and currents. They are known for their high reliability and efficiency, and they are also relatively easy to manufacture. This helps to ensure that the drive will be able to operate reliably for many years.
Linked power cells: The Siemens Perfect Harmony GH180 3500 HP VFD with 6900 Volts uses linked power cells, which helps to improve availability and reliability. Linked power cells are connected in parallel so that if one cell fails, the other cells can continue to provide power to the drive. This helps to ensure that the drive will not experience a loss of power even if one or more cells fail. This helps to ensure that the drive will be able to operate reliably even if there are problems with the power supply.
Optimized synchronous transfer: The Siemens Perfect Harmony GH180 3500 HP VFD with 6900 Volts uses optimized synchronous transfer, which helps to reduce downtime during power outages. The optimized synchronous transfer is a feature that allows the drive to synchronize with the main power when it is restored after a power outage. This helps to minimize the downtime that is experienced during power outages. This helps to ensure that the drive will be able to resume operation quickly after a power outage.
What is a frequency converter or variable frequency drive?
Frequency converters, also known as variable frequency drives (VFDs), are electronic devices that convert a fixed frequency and voltage into a variable frequency and voltage. These devices allow electric motors to operate at variable speeds.
What are frequency converters/variable frequency drives used for?
Frequency converters are used in many applications to operate single-phase and three-phase electric motors with variable speeds. These applications range from low power control, such as washing machine drums, to medium power control, such as pumps in municipal water supplies.
Industrial Applications Include:
Industries That Use Frequency Converters:
Motor starter, soft starter, frequency converter – how do I select the optimum solution for my specific application?
Motor starters, also called soft starters, are not frequency converters. They simply reduce voltage and are used for motors connected to weak line supplies or supplies sensitive to voltage fluctuations. Frequency converters, however, allow continuous motor speed control, providing advantages such as flexibility, process optimization, and energy savings.
What types of frequency converters/variable frequency drives are there?
Many terms are used in drive technology relating to converters – what do these terms mean?
What is the relationship between a frequency converter and an electric motor?
The speed of an electric motor depends on the frequency of its supply voltage and the rotor’s number of poles. Frequency converters allow control over voltage and frequency, enabling speed adjustment, braking, and energy recovery.
What is required when engineering a drive system?
Essential components include:
Optional components may include:
Why do I save energy and costs when using a frequency converter?
Frequency converters enable precise control, ensuring the motor only provides the required power. In applications requiring braking, converters can feed back energy into the power supply, reducing energy costs.
Examples of Energy-Saving Applications:
When do I require a separate braking resistor when using a frequency converter?
A braking resistor is needed when the drive system must be quickly braked, particularly in fault situations. The resistor converts kinetic energy into heat. This differs from a holding brake, which prevents unwanted motion in applications like cranes or inclined conveyors.
When do I require a separate filter when using a frequency converter?
Frequency converters and standards, what do I have to look out for?
Standards like IEC 61800-5-1 govern adjustable speed power drive systems. Other requirements may come from industry-specific regulations, plant operators, or utility companies. Examples include line quality standards for active converters and ruggedness certifications for maritime applications.
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