Process Know-how

Refurbishment of the electrical installation
of an EKG 5A shovel excavator

Summary: A shovel excavator of the type EKG 5 was refurbished using a favourably-priced concept. One advantage was that the use of modern electronic current converter technology enabled already-installed DC motors to be retained. This was made possible by dynamic power-factor compensation. Spare parts are cheap and will have a long availability. The fully-digitized current converter and its drive control assure high functional reliability. Comprehensive diagnosis functions are incorporated into the current converter and can be parameterized and documented by PC. The capital costs for the EKG 5 retrofit are approx. 50 % of the cost of new acquisition of a comparable hydraulic excavator.

1  Introduction
Karsdorf is a community in the German state of Saxony-Anhalt. In 2006 ABB acquired there an order for the electrical refurbishment of an EKG  5 shovel excavator. The order came from Lafarge Zement – one of the leading cement manufacturers in Germany. The company offers a large range of different types of high quality cements. It is of utmost importance to the customers of Lafarge that they can rely on an unchanging high quality standard of the products they buy. So the manufacturer has to make sure that all production processes run as they should, smoothly and without failure....

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