Electrical Advice

AC servo motor burning out 1 phase (motor side) but ok VFD side Discussion ThreadAC servo motor burning out 1 phase (motor side) but ok VFD side Electrical Advice

Hi all,

First post, so not sure how this will work out…

I’ve currently got a 3 phase AC servo motor (Lenze brand) at work that seems to be overloading 1 phase (U phase of motor)…
This motor is VFD driven by again a Lenze brand 9300.

The load for the motor is a coupling driven pressure roller, with another identical...

 

Another poll! Average age of the person on this site. Discussion ThreadAnother poll! Average age of the person on this site. Electrical Advice

Lets keep it simple. Anyone can vote! It's just to get an idea of the age of the people on this site, thought it might be a little interesting.

I've always assumed its mainly middle aged with a few retired and a few youngsters, we'll see.

edit.. the damn thing just pressed enter by its self! @westward !!! help!
I need to start again and add...

 

Will you vote? Discussion ThreadWill you vote? Electrical Advice

So the general election upon us after a month of farcical campaigns by some appalling candidates. Without starting a political argument what are you going to to?

Will you vote? for the original thread on Electricians Forums

 

Floating Neutral Discussion ThreadFloating Neutral Electrical Advice

I am a long time retired electrician, I have worked on many different
systems, I was High Voltage trained among other things.

I understand what floating means, but I don't understand a floating
neutral.

To amuse myself in my retirement, I decided to build a Solar System,
something that I knew nothing about, except that it is like black magic,
electricity from the sky!

I have 2 inverters, 12v X 3Kw and 12v X 4Kw...

 

Heatrae Sadia Electromax boiler not powering up at all Discussion ThreadHeatrae Sadia Electromax boiler not powering up at all Electrical Advice

Hi all,

The boiler, a Heatrae Sadia Electromax, is connected through a Timeguard timer. It's programmed to run between 20:30 and 22:30 every day and has been working fine until last night. I noticed there's no hot water coming out of the shower. Upon checking, the timer seems to be working fine. I can see the status changes on the display...

 

Hello to all Discussion ThreadHello to all Electrical Advice

To keep my account

Hello to all for the original thread on Electricians Forums

 

What causes low IR readings? Discussion ThreadWhat causes low IR readings? Electrical Advice

I’m currently at the second fix stage of a rewire and before all the flooring goes down I’ve decided to do r1+r2 readings to make sure everything is continuous and polarity is correct. I also decided to do insulation resistance tests and have got lower than expected readings.

On the downstairs lighting circuit I got a reading of around 200-300Mohm. After breaking the lighting circuit down I...

 

1 year old immersion heater keeps tripping thermal cut out, any suggestions? Discussion Thread1 year old immersion heater keeps tripping thermal cut out, any suggestions? Electrical Advice

Hello good people.

I have an ongoing issue with a top entry immersion heater over heat stat that keeps Tripping out. (Built into stat) On a 24hr mechanical timer.
The tank was replaced just over a year ago and with it a new immersion heater and stat.
The original stat worked fine for about 3...

 

electrical installation Discussion Threadelectrical installation Electrical Advice

Hi,
I have a question
What are the most common causes and symptoms of issues with the main relay in an electrical installation?What steps should be taken to diagnose and resolve complex EMC disturbances in an industrial control system?

Jack

electrical installation for the original thread on Electricians Forums

 

Why use hellermann sleeves (automation) Discussion ThreadWhy use hellermann sleeves (automation) Electrical Advice

Hi everyone, I am currently working in a new power station where we are terminating all the 20 pair and 10 pair individually screened SWA lsoh cables into the automation cabinets and junction boxes. My question is, why do all the pairs have to have hellerman sleeves over them? Why can't we just use insulation tape or self amalgamating tape? We were using amalgamating...

 

What would you do about this one. Discussion ThreadWhat would you do about this one. Electrical Advice

Client (local authority) want the consumer unit upgrading from a plastic one to the latest spec. I have also done a bit of repair work in the kitchen so it can be plastered. This is how the power gets from the street to the consumer unit.

firstly TNS with a looped supply into meter and isolator in a cupboard by the front door...

 

Two Pages for circuit details and test results Discussion ThreadTwo Pages for circuit details and test results Electrical Advice

Why is there now two pages, one for "GENERIC SCHEDULE OF CIRCUIT DETAILS" and one for "GENERIC SCHEDULE OF TEST RESULTS" before it was all on the same page GENERIC SCHEDULE OF TEST RESULTS", which had "CIRCUIT DETAILS", on it, this means writing the cicuits twice?

Two Pages for circuit details and test results for the original thread on...

 

Recent AM2 inspection exam Discussion ThreadRecent AM2 inspection exam Electrical Advice

Hi

I am soon to take the AM2.

A friend of mine who just took, said the following items are prefilled in the test schedule. Is it true?
- Type of wiring
-Maximum ZS

Also when comparing the Zs for the add-on paper questions. Do you write the OSG page number or the GN3 page number for reference ( as there are slight differences between them)

Thanks

Recent AM2 inspection exam for the...

 

Wiring an off on switch into a Contactor for electric motor? Discussion ThreadWiring an off on switch into a Contactor for electric motor? Electrical Advice

I have a sawbench motor that needs an on/emergency off switch fitted, have the hylec on/off switch and a contractor 240V coil with NC contacts.

Any advice on how to wire it up? Please see attached photos.

Can’t seem to get my head around it and failing to make it work on the on off buttons.

Thanks

Wiring an off on switch...

 

New reply emails Discussion ThreadNew reply emails Electrical Advice

Don't think it's anything I've done, but maybe wrong. I don't seem to be getting emails any longer, when a new reply is made to a thread I've contributed to, although I do get the notification that pops up for a few seconds in the bottom RH corner of my screen.
Any ideas welcombe.

New reply emails for the original thread on Electricians Forums