Power Conversion – Large Motors – Shredder Plant

Shredder Plant


“The average size of shredder motor when we started was between 6000 and 7000 horse power (4470 to 5220 kW), having for a long time been around 4000 hp (about 2900 kW) prior to that,” said commercial manager Ernie Muller.

“But in the last three years shredders have been getting bigger again, needing motors of up to 10 000 hp (7457 kW) to drive them. Until May last year the biggest shredder motors ordered from us were 8000 hp (5965 kW) units, but then we got our first request for a 10 000 hp motor.

“We assessed our capacity constraints, including the capacities of our lifting and handling equipment, and found it wasn’t viable for us to manufacture a unit of this size, but told the customer we could produce a 9000 hp (6711 kW) motor. They accepted this and placed the order.

“From 8000 hp to 9000 hp the motor frame size jumps from 190 to 220 and the weight of the finished product increases from 40 t to 55 t,” Muller pointed out.

The motor, scheduled for completion by the end of June this year, presents substantial logistical problems in transportation, as it has to be moved as one complete unit. It has to be carried on a special super-large lowbed truck and travel along pre-designated routes only at certain off-peak times of each day to reach Durban docks from where it is to be shipped, with similar special transportation arrangements having to be made in the US for the overland trip to its destination in Newark, New Jersey.

The completed motor is 6 m long, 4,5 m wide and 4 m high. The frame alone is 2,7 m high and weighs 13,5 t, while the stator and rotor weigh 20 t and 18 t respectively.

ACTOM Large Motors is part of the South African black-owned group ACTOM (Pty) Ltd, in which the BEE equity is 50,2%. The group’s BEE shareholders are Tiso Electrical (Pty) Ltd, Kagiso Power Projects (Pty) Ltd, Sibilant Investments (Pty) Ltd and Management.

ACTOM employs 5 000 people and has an annual order intake in excess of R4bn. It has 26 operating units, 22 production facilities and 21 distribution centres throughout South Africa.

ACTOM has exclusive distribution, technology and representation rights for Alstom and Areva T&D in Southern Africa and maintains management, technical and commercial links to the Alstom and Areva T&D business units in Europe.

For further information contact Ernie Muller, ACTOM Large Motors

PO Box 1026, Benoni 1500

Tel (011) 899-1030 Fax (011) 899-1206

E-mail ernie.muller@actom.co.za