Motor and drive packages gain 3-year warranty

A WEG Electric Motors (UK) product story

Edited by the Engineeringtalk editorial team Jul 27, 2004

WEG has introduced a 3-year warranty on all its UK supplied motors and drives when provided as packages (motor plus drive).

WEG has introduced a 3-year warranty on all its UK supplied motors and drives when provided as packages (motor plus drive).

This guarantee provides users with greater security of purchase and a single source responsibility for the equipment, which, with WEG's extensive UK distribution network is usually situated locally.

"The fact that we have introduced such a comprehensive warranty is evidence of the confidence we have in the quality and reliability of our equipment", said Marek Lukaszczyk, General Sales and Marketing Manager for WEG (UK).

"This is the result of WEG's unique policy of manufacturing all of its own components and equipment, right down to the wire and resins used in our electric motors".

"It's a policy we intend to continue with as evidenced by WEG Brazil's recent decision to invest $500 million over the next ten years in manufacturing facilities".

The introduction of the 3-year warranty follows exhaustive tests carried out at WEG's headquarters in Brazil.

These tests allied WEG's own, and other manufacturers' ranges of drives, with WEG's W21 line of high efficiency motors.

The only variable in the tests was the make of drive, all other conditions being maintained the same The tests revealed that motor temperature increase (delta T) was up to 11% lower using WEG drives, when compared with the other VSDs tested.

This is important for motor longevity, because when motor operating temperature is lower, the benefit is a longer insulation life.

Also aiding motor life is the fact that WEG motors are designed specifically for use with VSDs.

This means that their insulation is not subject to the damage that can arise from rapid voltage rises, this the result of mismatching of motor cable impedance and motor impedance.

However, to protect motors that are not so well insulated, WEG has ensured that the turn-on time of the output devices in its new drives is set at a level that reduces voltage rise time.

As this feature is internal to the drive, no additional external output chokes or special output filters are required, ensuring that greater motor reliability is not bought at the expense of additional cost.