Hi All,
Back in October I got a maintenance report on a Vertiv CP70Z 60 kVA UPS that said it had evidence of tin whiskering and needed cleaned. A batch of CP70Zs a few years ago had some metallurgical fault on the inverter bridge that allowed tin whiskers to form and grow long enough to clear...
Last week I checked a workshop that had a beeping dekstop UPS and found it was in discharge mode and all the 30 mA RCDs built into the small power sockets had tripped. Not all of the sockets had anything connected to them.
I absent mindedly reset them all and left it at that, but over the...
Hi chaps,
Just wondering if I could get some independent people to confirm my thinking about a problem?
I have a "temporary" installation that's been deployed for the last 1.5 years since the proper charger and battery failed. It's always been slightly undervoltage at about 116V for 9 x 12v...
Hi All,
I'm not 100% sure if this is the appropriate board, so my sincere apologies if I'm asking in the wrong place.
I currently work on a very big site, and my biggest bug bear ever is the total lack of information. I have done some reading on this site and others, and I get the impression...
Morning all,
I got called into work yesterday to attend a breakdown on a Siemens MasterGuard 125 kVA machine from 1999..
It had failed overnight and automatically switched itself to external bypass. The external bypass has a separate feed to the internal bypass.
During investigation I found...
5 years’ experience + 1 year intern, 3 in current role as "Electrical Engineer".
I was the first hire into a new department after my boss. We are meant to standardise electrical engineering maintenance across the company, then centralise it. I work for a big company with 15,000 employees but...
I've worked for five years since graduating with a BEng in EEE the UK.
In that time I've worked for three companies in numeric protection relay R&D, a hospital designer, and now I'm an electrical engineer in nuclear.
Everywhere I go, and even in pubs and among my family when we talk about work...
