Please Help, Bloody Hydravane Compessor???

[Marvo]

Even with an RCD rated at 100mA it could be cumulative leakage from multiple circuits.

 

[44ALLAN]

44allan not a problem, i dont do loads and loads of commercial, do alot of domestic but time served, obviously with more domestic is 30ma, so any ideas on proving this and altering this? many thanks

Well............0.01 means it's a 100mA RCD..............does that help?

 

[netblindpaul]

Does it mean 100mA?
Check your sums 44ALAN?
Does the compressor have a VSD?

 

[44ALLAN]

Just Thinking dont you think that 0.01 is very sensitive for a industrial unit using plenty of machines that could all be contributing to leaking to earth could this new machine bit tiping it over? etc

Leakage Clamp it mate then take it from there

I have compressor/welding sets the lot with 30mA 'cover'.
Don't need it, according to many,but it ain't tripping/it's tested regularly and it's far safer than just ADS .....IMO
If it trips............I'll assess then maybe put 100mA on the circuit as 'additional/supplementary' to the ADS.

If it's there and available use it

 

[44ALLAN]

Does it mean 100mA?
Check your sums 44ALAN?
Does the compressor have a VSD?

0.01 on an rcd means 100mA unless you can state otherwise VSD or not
Smiley face back at you and I raise

Big edit..............he meant 0.1 obviously :blush5:

And another edit..........bloody decimals fgs

 

[44ALLAN]

My apologies Paul

 

[Marvo]

Big edit..............he meant 0,001 obviously :blush5:

0.1A is 100mA. Given it's a commercial DB I'm guessing the RCD is most likely a 100mA and not the 10mA he stated.

 

[Knobhead]

Was it sold as “working” if yes. The simple answer:
Supply the compressor via a none RCD protected supply. If this means a separate 3Φ sub-board off the incoming then so be it.
If sold as untested, buyer beware!

I really can’t understand anyone putting a compressor or any (none portable) machine on a RCD supply. It’s just asking for trouble.

 

[44ALLAN]

Why rcd bathrooms or houses then?

In your opinion of course

 

[Knobhead]

You don’t get many compressors in a bathroom.

 

[High Tower]

You don’t get many compressors in a bathroom.

Where else would you keep it?

 

[brookster]

You have covered the simple things already like the emergency stop and brake wiring systems? Could be something mechanical causing the trip rather than earth leakage (non fault).
Going by what you are saying the compressor doesn't trip on start up, is there a way to apply the brake via the control panel?

 

[Engineer54]

If i was going to have an RCD on the supply to this compressor, it wouldn't be anything lower than 300mA. But then i wouldn't be installing an RCD in the first place, if it was my job!! lol!!

If this unit is tripping out the RCD main breaker, then it has to be a leakage problem doesn't it, otherwise it would be taking out the polly-phase MCB that's supplying the unit!! Is it that difficult within this factory unit installation, to provide a means of a separate supply to this compressor??

 

[brookster]

The RCD would trip before the MCB under fault conditions no?

 

[netblindpaul]

The RCD would trip before the MCB under fault conditions no?

Not necessarily, depends on the exact failure mode.