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Hi I'm supervising maintaining a building powered by a 1250 Amps and i had a total blackout twice within a week. Checking the MCB and it's...
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612
Having to wire around a messed up output for a month or so. Some sort of program corruption is keeping the central lubrication system from...
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Hello all, This is my first post so hope I'm in the right place for my question! I sell single-phase frequency invertors that drive variable-speed...
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So how many are aware of the difference between these two Standards? I had these highlighted to me a few years ago and it was news to me. The...
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7
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I want to check the insulation of the 3-phase 400VAC asynchronous squirrel cage motor. Motor's stator windings are connected in delta. I've read...
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1
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651
Hi everyone, Happy Friday! Could someone please point me in the right direction, I’m after the Max Zs for a Bill Talisman TLF633 63A MCCB, I’ve...
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373
  • Question
Hi I am a sparkie based in London. I am trying to shift from installation and maintenance to Testing. I did not use my 2391 for a number of...
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0
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228
Hi all i have asked a electrician about the mic level i would need to power the following machines a 45kva cnc mill, a 32kva cnc mill and a 60 kva...
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1
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485
Dear All, Need advice on some strange tripping occurred in our industry, our Protection Relay Micom P111, settings are below, our relay tripped...
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1
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485
Hi all, I am due to start the compex ex 01 - 04 at the end of June. From hearing back about a number of people who have failed the course it...
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15K
Hi guys, long time no show I know. Anyway, started a new job few years ago, there is a pre-historic gear cutter with a Q series Mitsubishi PLC in...
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An isolator had heat damage and was replaced, not by me, but the new isolator is 125A instead of 40A. They found one and threw it on. I locked it...
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453
Hi All I’m in charge of the maintenance (machinery and facilities) in a plastics manufacturing business. I have a ‘team’ of little old me and an...
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3
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723
Good evening. I am not sure if this is the correct place to post so please advise if there is a more appropriate board! I have recently applied...
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511
Our company in the UK had its Periodic Inspection done over a year ago but now we’ve lost the EICR. We’ve contacted the company who did the...
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20
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2K
Went to a job this week where we replaced a slip ring motor. We went back as it was not running upto full speed which we found was due to the oil...
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4
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962
  • Question
I have been tasked with seeing if a site is capable of accommodating a large new installation. I have done some working out but I'm not sure if...
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7
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717
Hi, Main LVAC Board, Directly Fed from a Transformer. What do i put as an OCPD on my BS7671 Test sheet? Since I don't believe the Transformer has...
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3
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881
Dear forum members, Would you give please a practical tips how to measure and what measurement equipment to use (with some examples if possible)...
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422
Where can I find Industrial Electric Diagrams to study and learn from please! Thank you!
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0
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275
I am looking for the B1 case size they made between the 1971 (GEC D case type) and when Siemens took over the brand. I don't have access to the...
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4
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492
While driving home from Runcorn today via mid Wales my mind started wandering. I started thinking about HV safety distances. Now I know that at...
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14
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1K
Hey all, looking for a bit of industrial electrical advice, I'm kind of stuck between a rock and a hard place at the moment, the company I work...
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28
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3K
Bit of a long shot but has anyone got a circuit diagram for a Megger Foster OTS 60PB oil breakdown tester. Ours has gone 'breasts skyward' and I'm...
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405
Hi All, We have a Merlin Gerin Compact NS100N Single Phase MCCB I've been asked to find its Max ZS Values and to be honest I cant find anything...
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6
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2K
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Hi Everyone, Fairly new to the forum I think I'm in the right thread. I'm hoping to get some advice. I originally served my apprenticeship as...
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420
Hi All, I have a question trying to understand earthing arrangments SO, We have a DNO Substation, 4 Core armoured Feeding the Distribution Board...
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12
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Hello everyone, I'm a service engineer from Malaysia and come across a simple problem. I work with instrumentation and the problem I face with is...
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0
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289
Cable calcs using cable calc app Working out cable size for a workshop. 100m long, 100a supply, mccb 100a zs- 0.23 ohms, in a duct on its own...
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2
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765
Hi all, I have been asked to install individual three-phase supplies for a band saw and table saw. Having trouble figuring out the correct cable...
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15
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2K
Hi all :) I teach Electricity in France. With my english teacher, we want to create an activity for our student. The goal for students is to...
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16
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1K
Hello Folks Myself Arif Patel Preston Dubai, I Wanted To Know Which Type Of Wires Uses In AC's At Offices? If You Know Please Reply Thank You!
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725
Hi, I’m Not getting enough torque on startup to turn pump. Turns pump successfully maybe 1 in 6 times on startup and then fine at full speed...
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9
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766
  • Question
Hi everyone I’ve done a bit of metal conduit before but been reading up online and seen people saying about marking the former to know where to...
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780
Good evening everyone Can any help or give me some advice please on measuring bending galv conduit. My question is bending long 3m lengths...
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7
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1K
Posted this to the DIY section since I'm not a business or employee in this matter but it feels more appropriate (and might actually get...
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527
I posted a month ago regarding a single phase motor + panel I have been given to try and sort following water damage to the panel. The assembly...
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820
Removed the associated phone-line. How do I permeably silence this message?
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566
Hi, I am a mechanical engineer tasked with some electrical engineering scope of work and not sure where to look for information on the...
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6
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760
I previously posted about having a single phase reversing motor which I thought had a centrifugal switch. After looking into it more, it actually...
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1
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802
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