SIEMENS

SINAMICS V20, the versatile inverter for basic demands

Today, in an increasing number of applications in plant and machinery construction, individual automation and drive solutions are demanded that automate simple motion sequences with low associated requirements.

With its compact SINAMICS V20, the basic performance inverter, Siemens offers a simple and cost-effective drive solution for these types of applications. SINAMICS V20 sets itself apart with its quick commissioning times, ease of operation, robustness and cost-efficiency.

With four frame sizes, it covers a power range extending from 0.12 kW up to 15 kW (1/6 hp up to 20 hp).

A sustainable reduction of power costs first requires an analysis of the electrical system’s current consumption and power flows. This is supported by our SENTRON PAC power monitoring devices.

 Easy and space-saving mounting
 Fast commissioning
 Intuitive operation
 Integrated and optional multifunctional digital inputs and outputs
 Straightforward system connection through integrated and optional communication interfaces
 Developed and tested in accordance with European and international standards

In Low Voltage industrial installations, capacitors are mainly used for reactive power correction (raising the power factor).

When these capacitors are energized, overcurrents of high amplitude and high frequencies (3 to 15 kHz) occur during the transient period (~1 ms). The amplitude of these current peaks, also known as “inrush current peaks”, depends on the following factors:

 The network inductances.
 The transformer power and short-circuit voltage.
 Type of power factor correction: fixed or automatic.
 Harmonics present in the system. The in-rush current of such high magnitudes is undesirable and it is likely to weld main contacts of any standard contactor. Therefore, contactor for capacitor bank switching must be designed to withstand :
 Permanent current that can reach 1.5 time the nominal current of capacitor bank.
 Short but high peak current on pole closing.

Today, three-phase motors serve as the ultimate drive concept. Yet, for
many cases, direct starting or wye-delta* starting may not always be the
best solution. Annoying side effects such as mechanical impact in the
machine or voltage drops in the line supply frequently occur. With SIRIUS
soft starters, these problems are a thing of the past. This seamless range offers
a suitable soft alternative for almost any application – whether for standard
or high-feature starting. Optimum and future-proof machine concepts can be
very easily and efficiently realized through the smooth starting of three-phase
motors.

SIRIUS soft starters are perfectly matched with the SIRIUS devices for the control cabinet. The modular standard components, which can be flexibly combined, offer everything for the switching, protecting and starting of various consumers. The range features state-of-the-art technology and offers continuous innovations such as compact soft starter solutions, solid-state switching devices and many further products.
With only seven sizes, the range covers the entire power spectrum up to 250 kW. To assemble a load feeder in next to no time, a soft starter, circuit breaker, contactor or overload relay is simply docked on and screw-fastened. By the way, also maintenance is just as easy and fast as the SIRIUS components’ configuration, installation and wiring.