Rcd ramp testing

[hoover]

Can someone tell me when and why would I need to do this test? Thanks in advace.

 

[bugsy]

RCD tripping current test - inspecting testing and verification

 

[ian.settle1]

Can someone tell me when and why would I need to do this test? Thanks in advace.

#
By doing a ramp test you see what current the RCD actually trips at.

 

[kung]

#
By doing a ramp test you see what current the RCD actually trips at.

Yep its a good function on your tester

 

[benji]

i,ve often thought that with the price of rcd,s they should come with a calibration cert.

yours benji

 

[ian.settle1]

i,ve often thought that with the price of rcd,s they should come with a calibration cert.

yours benji

And how would you calibrate it in the future as they are a sealed unit

 

[bobbyhowler]

IT puts a fault current through the rcd ramping it up in stages untill the rcd actually tripps on a 30ma rcd it should trip between 27 and 30ma on a healthy device if on the other hand it starts tripping at 20 ma or less you could have a faulty device ( nuisance tripping )your aiming at it tripping close to your rated fault current.

 

[Guest123]

It's a good weapon to use in the battle against accumulative leakage earth faults too.

If you suspect a particular appliance may be faulty then ramping the RCD with this appliance plugged in and switched on will show how much leakage it's already putting into the circuit as the tester will push out less current before the RCD trips.

 

[rocker]

If you're wondering when you should do it as in 'where do I record the data?', BS7671 certs don't call for you to do it, it's just a handy thing to have.

 

[kung]

It's a good weapon to use in the battle against accumulative leakage earth faults too.

If you suspect a particular appliance may be faulty then ramping the RCD with this appliance plugged in and switched on will show how much leakage it's already putting into the circuit as the tester will push out less current before the RCD trips.

Very true ! but my kewtech KT61 doesnt have the function 2010 and i think i will invest in a nice Megger