Hi
I hope that you can indulge me ! I am currently looking at a system and would like some advice - we have several remote items of equipment that we monitor through the net and as such I am looking at a way of monitoring the network that monitors our equipment. What I seek to do is have a...
Recently discovered an error that has been present for over 5 or 6 years now with a set up. We have identified that we have multiple neutral earth points inadvertently installed on a power distribution system. My question on this involves the CT set up - if we have been running with the neutral...
This is one that has been making me think....
I saw a site a while back and Id love to know how they did it and how this could be used.
There was a list of items on the left hand side of the page, when you hovered the pointer over that item it brought up a picture. When you clicked on the item...
http://www.liveleak.com/view?i=995_1213752982
This is quite a video - found it while looking up information on arc flash. Id really appreciate knowing more about this as in if the guy survived and what exactly happened. To me it looked like a possible racking fault maybe racking out a breaker...
LONDON, May 28 (Reuters) - Britain's power supplies returned to normal on Wednesday after a series of unexpected plant shutdowns briefly cut off hundreds of thousands of people on Tuesday, network operator National Grid (NG.L: Quote, Profile, Research) said.
The almost simultaneous shutdowns of...
Wonder if anyone has any thoughts on this one....
Two generator sets are used together to support a critical load. These are set so that both run together and when the utility supply fails the generators start and supply the load. The main load itself is protected by UPS units and there are...
Im looking for some opinions on a UPS that Ive found on the internet, its one that uses no batteries and I find it pretty interesting especially when we are trying to reduce the impact on the environment.....
www.activepower.com
Its a compressed air storage device that discharges through a...
Have one to ask....
Setting up for a generator panel I take it requires some specialist theory, Im looking at a situation that happened and want to try and work out if this would have been an expected result or if there was an issue with protection grading.
Scenario multiple generators set up...
Well then lets hear them - tales of woe and moments of opps - we have all had them and know of them - what was your worst and what happened. Where did it go wrong, and how did the recovery go?
Always an interesting one and Im sure there are a few ones out there of interest.
Rugged
I see that out american cousins are heavily into arc fault calculations. Is this something that will come to the UK and start to feature alot in our own electrical systems ?
If so then where should I be looking at to try and get a head start and look to start prepreation of a plan of attack to...
A query for the group....
Looking at a situation just now and trying to work out what would happen. Take an example you have two rotary UPS units - each UPS is connected to the same source so they will be syncronised to the incomming utility supply.
If I measured between like for like phases...
I wonder if anyone out there could advise on this one -
Scenario Generator farm consisting of several diesels - these feed a diesel marshalling board fitted with ACB's.
Each gen set feeds an ACB which connects to a bus. The Bus then connects to several ACB's that feed the connected loads...
we have two transformers supplying our facility these being 11kv to 415v rated at 2.5mva.
Both are oil cooled and one is running roughly 10 deg hotter than the other.
doing a check on the harmonics we got the following -
cool transformer hot transformer
THD 22.70% 74.60%...
Again got the jitters with this and being a little wary...
Bluetooth headset, I take it that if the user left his phone in the car and walked into another area the headset would constantly ping to try and re-establish contact with the handset / phone.
This worries me slightly as in this...
Im curious as in how to give information relating to this sort of complexity.....
Right simple explaination of system. Various single phase loads connected to a 415v three phase supply. supply being four wire as neutral is included.
So we can have say a total of 15A on phase one 34A on phase...
Im working on an efficiency project and seek to gain some information to assist me with this. Hope that you can throw me some pointers for this.
Air flow temperature drop - If the air coming into an AHU is more than that leaving an AHU then there has been some temperature absorbed - how could...
Going through this I found that there is a system out there that uses one wire and gives a three phase service. Been used in rural areas and the like. It involves SWER network to provide the primary feeder - feeding into a substation. This then produces a single phase line voltage of around 480v...
Can anyone help me with this one....
Battery electrolyte topping up.
We have a reverse osmosis plant on site can we use that water to top up the batteries or do we need to get in
specific de-ionised water for this ?
I know the savings wouldnt be much it would just mean that we had a readily...
We have a chiller packaged unit operating as a dehumidifier, ran into a problem and wanting some advice here on this one.
when the humidity level becomes satisfied the chiller stops, of course once stopped it shoots back up and then we have to wait for a set time for the motor protection...
Here in the Uk we have legal definitions for roads and the motorway is classed here as a "special purpose road". This means that there are restrictions for certain types of traffic and the road itself is built to a set standard.
Now Im wondering do other countries in the world employ this sort...
