Testing 110 Tx

[i=p/u]

Anyone test these before and is there anything you know that I don't.

from what I see 110v transformer is supplied from 16A protective device which is a sub main circuit ,Then the 2 x 55v lines are protected by 16A fuses


Q. Do I just cables upto primary side?

 

[davesparks]

Test the circuit feeding it and then the circuits it feeds


Sent from my iPad using Tapatalk

 

[Pete999]

What is the TX used for,

 

[Lucien Nunes]

If it is SELV CT-E remember to test for continuity from centre-tap to earth, and ensure it is earthed when you IR test the primary to earth, in order to prove the insulation of the windings as well as the circuit.

 

[i=p/u]

They just mounted within panels , I assume for fitters or the likes

 

[i=p/u]

As far as I know you test the primary side as submains and then has 2 circuits each at 55v to Earth . 16A fuse testing each line.


wheres the neutral Lol


Ps is there anyway of knowing what overloads are set at on a vsd

 

[Brightspark2]

It will need double pole protection on circuits if 55v to earth.

You say in panels, are these control transformers?.

Sent from my E5823 using Tapatalk

 

[Brightspark2]

Didn't realise this was 2 days old! Oops.

Sent from my E5823 using Tapatalk

 

[Risteard]

If it is SELV CT-E remember to test for continuity from centre-tap to earth, and ensure it is earthed when you IR test the primary to earth, in order to prove the insulation of the windings as well as the circuit.

Reduced Low Voltage (RLV) isn't SELV. It exceeds Extra-low voltage.

 

[davesparks]

As far as I know you test the primary side as submains and then has 2 circuits each at 55v to Earth . 16A fuse testing each line.


wheres the neutral Lol


Ps is there anyway of knowing what overloads are set at on a vsd

I think it will be a final circuit feeding it rather than a distribution circuit.

 

[Lucien Nunes]

(RLV) isn't SELV

Oops, well spotted, I didn't mean SELV, I just meant CT-E.

 

[i=p/u]

both lines should be fused on secondary side so we put in as 2 circuits....

i see some dont have the fuses and apparently have thermal cut out