Casestudie 29 August 2023

Obsolescence of the oven’s 7 CC ALSTHOM drives

Number of project hours: 1,200 hrs

Project duration: 18 months, including two stoppage phases

Client expectation

The obsolescence of the oven’s 7 CC ALSTHOM drives, leading to the unavailability of spare parts, was making maintenance and repair impossible.

Our client therefore wished to replace these drives.

DV GROUP Solution

We suggested the following solution to our client:

A preliminary analysis of the curve of currents used on each movement
The replacement of the drive managing both motors simultaneously by two new drives, maintaining synchronisation.
The implementation of continuous current MP 4 quadrant drives, which would be long-term and maintainable over time
The creation of turntables in the workshop in order to minimise intervention time and the replacement of all the electro-technical equipment, including loop contactors

Implementation of 8 drives from 350A to 825A, 4-quadrant technology

Replacement of the ultra rapid contactors to break the loops

Preparation for network connection with the oven’s monitoring system

Analogue steering following this, at the client’s request

Work carried out

Electro-technical design
Electrical diagrams under See Electrical
Creation of 6 solid-bottomed sheet base frames
Removal of the electrical cupboards
Fitting of the new base frames
Commissioning
Training

Implementation of 8 drives from 350A to 825A, 4-quadrant technology

Clients gains and benefits

Our client has been able to take advantage of the full refurbishment of his installation. We have installed new, premium brand equipment which will be easily maintainable and repairable in the long term. This has therefore allowed stoppage times owing to breakages and troubleshooting to be reduced and now matches the client’s programmed stoppages.

Expertise