Swimming Pool Starter Help!

[dlt27]

Hi and thanks in advance.
I have been called to a job to look at a faulty starter for a swimming pool.
The starter apparently has never worked and swimming company has agreed to pay for it to be fixed ( there electrician has had 2 goes already).
The starter is supposed to be wired so that if there is a power cut the pump automatically restarts, also it is controlled by a 240v timer which also turns on 2 uv lights.
The starter at the moment never turns off by the timer and the reason for this I noticed straight away is that starter is a 415coil being controlled by a 240v timer.
The main trouble I've got is does anybody know if there is a starter with 240v coil and n/c contractor so after power cut it automatically restarts. Existing starter is Schneider LM35P714.Thanks again.

 

[Pete999]

Why not a self resetting RCBO?

Are you suggesting that you fit a device that will trip in the event of a fault, only to reset it's self before the fault has been identified and rectified, seems to defeat the point of a Safety device don't you think?

 

[Richard Burns]

Self resetting RCBOs monitor the circuit and will only reset if the fault has cleared quickly, they are intended to avoid the nuisance of short duration intermittent faults. If the fault is significant then the RCBO will not reset.

 

[Pete999]

Self resetting RCBOs monitor the circuit and will only reset if the fault has cleared quickly, they are intended to avoid the nuisance of short duration intermittent faults. If the fault is significant then the RCBO will not reset.

Thanks for that Rich

 

[netblindpaul]

Technically a swimming pool pump control system comes under the Machinery Directive and if it is to auto restart then there would have to be a hell of a lot of built in safety if there is any potential of injury from it. Also BS 7671 would not apply due to clause 110.2,xi.

 

[Adam W]

What's wrong with chlorine?

Chlorine sanitises the whole pool all the time, not just the bit in the tube when it's switched on.

 

[dlt27]

Hi all, just a quick update.
When investigating closer I found the contacts on the starter contactor had welded together so the pump was never turning off by the timeclock.
I thought using 240v from the timeclock just wouldn't switch the contactor, however being as the customer said it used to work I'm thinking now that 240v was operating the contactor and caused it eventually to weld closed due to arcing.
I fitted new starter with 240v coil and all now seems to be working correctly.
Thank you again for all advice given..

 

[Lucien Nunes]

I'm thinking now that 240v was operating the contactor and caused it eventually to weld closed due to arcing.

This sounds quite likely. If the coil was running at the wrong voltage, it might have been very sluggish to pull in and/or not compressed the contact springs fully, causing excessive arcing.

 

[marconi]

dlt27 - so good of you to provide an update - alas too many folk do not. Well done, Sir!