The perfect solution for imperfect conditions.

In less than a quarter of a second, the SINAMICS Perfect Harmony GH180 drive can bypass multiple failed cells to maintain a balanced output voltage. With one cell in bypass, the drive still produces sufficient voltage to allow the process to continue uninterrupted, and the quality of the voltage and the waveform remain virtually unchanged.

Synchronous transfer is used to soft-start multiple motors in a series and efficiently transfer them across the line without stressing the power grid. This closed-transfer approach not only increases energy efficiency, but also helps protect motors and equipment from excessive torque transients.

With a proven record of 99.99 percent process uptime, ProToPS™ protects your process from faulty sensors or data. Unlike typical systems that simply trip the drive and automatically shut down the system due to a malfunction, ProToPS™ offers a proactive control strategy for applications where failure avoidance is critical.

SINAMICS Perfect Harmony drives meet the most stringent IEEE-519-2014 requirements for voltage and current harmonic distortion. An integrated sinusoidal converter not only eliminates the need for harmonic filters, power factor correction capacitors or extra bus capacity, but also protects other online equipment from harmonic disturbances.

No drive offers a higher-quality waveform output than SINAMICS Perfect Harmony. With 21 levels of nonharmonic output voltage, it accommodates any standard motor without requiring additional output or dv / dt filters – which can reduce efficiency and reliability – and it provides the lowest peak voltage to the motor windings to help extend motor life.

Only SINAMICS Perfect Harmony drives are engineered to operate reliably in environments with ambient temperatures ranging from -40° C to +50° C. No other drive can tolerate such a broad range of extreme conditions. An optional PDC allows the drive to withstand even the harshest outdoor conditions, from tropical environments to ocean platforms.

SINAMICS Perfect Harmony GH150 drives are specially designed to offer greater versatility and easy integration. Their modular design enables the use of a separate transformer as well as a separate control cabinet. The modular design creates an adjustable footprint that allows for a more flexible plant layout. The control cabinet can even be installed in a low-voltage operator’s room for facilitated operation of the drive.

The SINAMICS Perfect Harmony GH150 raises the standards for transformer flexibility in cell-based medium voltage drives: By allowing for different transformer specifications – such as cooling, size, pulse number and primary voltage – it can accommodate site conditions that require remote placement of the transformer, either inside or outside the plant. The SINAMICS Perfect Harmony GH150 can also help minimize initial investment cost for electrical room air conditioning as well as continuous operating costs. The ability to choose a locally sourced standard transformer may even help reduce the total cost of ownership.

SINAMICS Perfect Harmony GH150 drives are capable of working with almost any induction or synchronous motor available, which makes them perfect for retrofit projects and high-speed applications. They also provide great flexibility in operating a motor with cables that are several miles long.

The SINAMICS Perfect Harmony GH150 drive is often used with high-speed compressors or integrated compressors that need high output frequencies. The higher the motor speed, the higher the required VFD output frequency. With its inherent and highly effective switching frequency, the SINAMICS Perfect Harmony GH150 drive requires little-to-no derating, which means less oversizing and higher efficiency. Additional losses in the motor are often.

Siemens has always upheld the highest quality and safety standards in the manufacturing of medium voltage drives, but we are now taking safety a step further. Siemens Arc Defense Technology is the first in the industry to apply passive arc-resistant features to medium voltage drives with integral transformers. Smart upgrades such as pressure-relief panels and custom arc filters help to contain dangerous arc energy in the event of an arc occurrence.

A reinforced structure and the addition of integrated pressure-relief panels to the cabinet roof made it possible for the drive to effectively redirect arc energy up and out. This top-venting approach has the added benefit of being more cost-efficient than ducted solutions.

Standard air filters were replaced with custom arc filters that are nonflammable and metalized. IP42-rated louvers add another potential layer of safety.

Though not yet mandatory, arc resistance requirements are right around the corner. Siemens first began arc-fault-testing its medium voltage drives in 1998. Ever since, all Siemens medium voltage drives have been — and continue to be — rigorously tested and certified to the most current safety standards, including IEC, UL and CSA.

Siemens Arc Defense Technology helps direct the hazards of arc events away from personnel and plant equipment to mitigate damage and allow a faster return to normal operations. The result is a highly efficient, fault-tolerant drive that can help limit operational losses and prepare you for future regulations.