Power-saving UPS for elevators in Climate House 8° East


UPS protection of OSMA passenger elevators delivers ultimate energy efficiency

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© OSMA-Aufzüge

UPS contribution to energy efficiency

Through a consistent policy of optimization, EFFEKTA succeeded with its ‘MTD Industry’ version of UPS to develop an uninterruptible power supply system with a very low level of autonomous power consumption, positioning it by as much as 70% below the standard power consumption level of standard UPS units on the market. Just how decisive this contribution to cost-savings can be in the classification of the energy efficiency of an elevator becomes clear when you take a look at the relatively tight template limits that define this. An elevator in efficiency class A must consume less than 50 Watts when stationary. For efficiency class B, maximum power consumption is set at 100 Watts – so a reduction of 20 Watts can constitute an important factor in obtaining a better classification.

Having said that, with MTD Industry, EFFEKTA has done more than achieve maximum efficiency in terms of power consumption. The entire design of the UPS opens up opportunities for conserving resources. For example, the control unit and batteries on this UPS are housed separately. This simple plug-in design makes it easier to replace the battery without the need to replace the electronic control unit at the same time. The replaced battery packs are reconditioned in the plant and are then capable for further operation.

 

Energy efficiency – not just a question of standards

OSMA elevators, a company with a rich tradition, was immediately faced by two basic requirements to satisfy in its project at ‘Climate House Bremerhaven 8° East’. The objective not only entailed implementing the energy efficiency stipulations of VDI standard 4707 for no fewer than seven elevators, but also to provide autonomous power to stationary elevators in a way that entails the lowest possible level of power consumption. There was also a question of resource conservation – a key promotional claim of Climate House 8° East in Bremerhaven – the aim being to build an energy-efficient structure that delivers a low environmental impact.

In keeping with the priority status of our customer OSMA this project also involved satisfying the quality and innovation standards of this leading elevator manufacturer: This family-owned company has about 650 payroll staff across its 18 locations in Germany. It produces around 1200 elevators a year and provides maintenance cover to keep 20,000 existing elevator systems running safely and without any problems. There is good reason why the name OSMA is now synonymous with optimum technology, prize-winning design and great energy efficiency. OSMA is therefore an ideal partner for EFFEKTA to collaborate with, further enhancing its great reputation with new, intelligent UPS concepts.

To achieve tangible reductions in the energy needs of a stationary elevator, the UPS and/or its consumption of control current are an important factor. Consumption levels of 30 Watts or more are fairly common for a UPS and, given the tight limits governing the efficiency classes for elevators, this plays an altogether important role alongside factors such as control cabin lighting, drive control, displays and other components.

 

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© OSMA-Aufzüge

 

70

percent energy saving

20

Watts less autonomous power

7

+x elevator systems equipped with this

Even more advantages: service-friendly, flexible, robust

Intensive development collaboration between EFFEKTA and elevator manufacturers has resulted in other properties that deliver great benefits. The system is very compact, there is an external control input and an automatic bypass relay. This means that if the UPS is switched off or is malfunctioning, the mains power inlet is switched directly through to the output and this further enhances operational reliability. The TN network also functions in battery mode, providing personal protection with the ground fault circuit interrupter (RCD), also in battery mode. Another advantage is the modular, plug-in layout of this device which makes it very easy to service. The ‘hot-swap’ battery replacement feature also makes maintenance fast and inexpensive. Since the power electronics and battery pack are separate, handling is easy, extending the service life of the battery. The system can be supplied to customer designs. Various housing shapes are possible, assembly is easy, various types of battery can be used and various status messages are displayed by the relay conductor. There is also the option of installing a dust filter.