Hi everyone,
I picked up a new text book the otehr day to brush up on industrial power. I came across soemthing i'm not sure is a mistake or not.
The example reads:
Utility: 120kV, 2000MVA, X/R=15
Base MVA = MVAb = 10
Base kV = 120, 13.8, 0.6
it then proceeds to work out base current for a...
I've come accross an old wives tale so to speak.
Some of the guys on site have been telling me that it isn't good practice to run a caddy welder (portable hand welder) or any electric welder for that mattter from a regular generator.
Has anyone heard the same thing? And if so a reason why...
G'day All,
I wanted to ask your opinions of a setup that is happening on the site i'm on. We currently have a 1500kVA Gen Set which is on top of a trailer (rubber tyres) being towed behind some mobile plant. What i'm interested to hear from you all about is the earthing of this...
Hey guys,
I've just come across a situation i'm a little confused about. Currently we have a HV motor which is earthed through it's supply cable which carries it back to the MEN of the entire machine it is working in. However we have been asked to put another earth from the chassis of...
Hey guys, had another question for you this time relating to a LV 3-phase bolted coupler. We have a coupler on a job which does not contain a pilot (there is provision for one in the coupler however). Now there has been concern raised that this does not seem correct however i am tending to...
Hello All,
I have a situation that i'm seeking some advice on. Basically we have a ~1500kVA transformer supplying power to our Motor Control Centre. The run is only short, around 20-30 meteres. However total current is rather high as each phase is made up of 3 400mm2 single cores unarmoured...
I have a machine that is puzzling me regarding it's earthing system. Supposedly we are using an MEN system, however i'm confused over how many MEN points we have. What is happening is HV power is being supplied to the first machine (MEN point 1), then it is being brought over to a second machine...
