Busbar lighting systems

[Spark plug]

Right at work I've been asked to fix the main warehouse lighting system as it never worked correctly since the building was new. the building is about 5 years old and the. Buyer fell through before it was fully finished as it sat that way until the company I work for bought it, this was all before I worked there so I don't know exactly what has happened.

Anyway I have identified the probloems and just need to find a solution. First about 40 of the lights where connected to the peremenent live so where Un-switchable and the other was a large number of the emergencys where never wired so never worked.

The lights are high bay Sodium luminaries and about 50% combine a compact fluorescent emergency.

They are fed from 3p+n+e busbars with 2 switched lives and 1 peremenent live. The busbars are fed from 3 single pole MCB's.

So Bering fed from single pole MCB's if you lost the two lighting phases you could end up with a dark area and no emergency lighting is this acceptable, should the emergency lighting only operate under a total power loss situation or should they be fed from triple pole MCB's.

 

[the snooper]

emergency lighting is fed from the same supply that the light uses and permanent live to the light keeps the batteries charged as soon as power goes off batteries take over

 

[the snooper]

any 3phase machinery will stop working if a phase drops out and in a perfect set up any single phase gear should be on the same phase as the lighting for that area

 

[brightspark]

years ago emergency lighting was fed from a seperate supply on its own .now its fed from the same local lighting feed aeria. reason being if theres a power out in a particular aeria the emergency lights will come on if the general lighting fails

 

[Spark plug]

emergency lighting is fed from the same supply that the light uses and permanent live to the light keeps the batteries charged as soon as power goes off batteries take over

Yes that's correct, but in this instillation the switched live and the peremenent live are fed from two different phases by two MCB's

any 3phase machinery will stop working if a phase drops out and in a perfect set up any single phase gear should be on the same phase as the lighting for that area

That's not the case in this factory as it's just too big, in fact the lighting is fed from a different transformer to the machenery.

 

[Spark plug]

Just to clarify I'm talking about over 100 highbay fittings.

I just not sure of the ins and outs as I've never worked on a installation of this size before.

 

[the snooper]

Yes that's correct, but in this instillation the switched live and the peremenent live are fed from two different phases by two MCB's



That's not the case in this factory as it's just too big, in fact the lighting is fed from a different transformer to the machenery.

cant see why they would use 2 different phases its wrong, still needs the same amount of cable so why not wire to same phase and just install a switch for the lighting.

don't suppose it really matters that machines and lights are on different transformers as long as emergency lighting works

 

[the snooper]

years ago emergency lighting was fed from a seperate supply on its own .now its fed from the same local lighting feed aeria. reason being if theres a power out in a particular aeria the emergency lights will come on if the general lighting fails

my mate had a place where all the emergency lighting ran from a bank of batteries it was all 24v

 

[Robotstar5]

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