Zest Electric Motors & Drives – the leading distributor and marketer of a wide range of low-voltage, highvoltage, direct current and special electric motors, variable speed drives, soft starters, switchgear and transformers in sub-Saharan Africa – recently displayed the biggest cast-iron motor of its kind at the Zaminex mining exhibition in Zambia. This was the 2500 kW, fourpole, 6600 V WEG HGF 630 motor.

Zest's massive motor

Seen here at the Zaminex mining exhibition in Zambia are: Tom Anderson-Slight of EC Mining Limited, James Blakemore of Zest and Edson Christofolini of WEG

Zest’s official distributor in Zambia for the past six years has been EC Mining Limited, which specialises in the provision of high-quality equipment and technical installation services to the southern African mining region, concentrating on Zambia and the Democratic Republic of Congo.

Based in the Zambian town of Kitwe, the company has easy access to all the main mining towns on the Copperbelt. Its main clientele includes Konkola Copper Mines, Mopani Copper Mines, Chambishi Metals, Ndola Lime Company, Chilanga Cement and Chibuluma Mines.

“Our challenge is to expand our operations regionally and throughout the rest of Africa to supply quality products and services to a fast developing and expanding market,” says Tom Anderson-Slight, who heads up the Zambian operation.

The motor which was displayed has a frame length of 3.3 metres. It weighs 13.3 tons, with the frame alone weighing 5000 kg. A total of 4 800 kg of steel and 1 250 kg of copper was used in the manufacture of this motor. Large WEG electric motors of this type are premium efficiency units with typical efficiencies of 97.5%, the company claims.

“Zambia has always been an important focus in Africa for Zest and WEG, and is becoming even more so with the current economic upswing in the region,” says Zest chairman James Blakemore.

Zest has already supplied motors to Konkola Copper Mines Plc (KCM), the largest mining and metals company in Zambia. It supplied seven 355 kW, four-pole, 3300 Volt pump drives to KCM.

The company also supplied a 5150 kW, 11000 Volt WEG synchronous motor to Mopani Copper Mines (MCM) earlier this year. The use of a synchronous motor will facilitate an improved power factor across the entire plant. MCM operates the Nkana and Mufulira copper and cobalt mines.