I did a search for ‘VMX Switchgear manual, and couldn’t find a secure site which had one (many sites entice you to register and have a free trial, but you need to give them your credit card details... very dangerous!).
When I worked for a similar manufacturer at that time, manuals were not a single document. Because of the variations in the product (single busbar, double busbar etc) the design engineer would complete a ‘tick list’ of a selection of pre-printed sheets, contract drawings and schematics, and list any suppliers’ documents (protection relays, meters etc). this list would be kept in the design file and a copy sent to the manuals clerk who would assemble the required number of manuals, from the pre-printed sheets etc, put each document into a binder and write a despatch note and send it and the binders to the mail room who would get the documents wrapped and sent to the customer.
A copy of the despatch note would be sent to the contracts department who would then tick this off their contract list.
Very bureaucratic! But this explains why the original manual may not actually exist. There was never room for the space required to keep a copy of the manual for each switchboard. In my experience, instruction manuals never get near the machinery, and get left in offices, often on another continent.
When I ran a service department, we would always get two copies of each manual, as when our commissioning engineer went to site, the customer’s site engineer would plead for his manual as the contract ones never got to site!
Nowadays we can use Adobe or whatever to assemble a pdf document which can be easilty stored and transmitted.
Good luck but you may not be able to find a manual. Slaters are your best bet.
In my search, I did find a VMX leaflet as attached. Hope this helps.
A final thought is that GEC, then Areva, then Alst(h)om, then GE had a presence in India, and I think manufactured VMX under licence, they may be able to help, if you can find them.
