Testing the SELV Discussion ThreadTesting the SELV Electrical Advice
Correct me if I am wrong but if we are to test a SELV transformer do we:
1. Join conductors of low voltage side of transformer together.
2. Join conductors of primary side of transformer together.
3. Test between these at a voltage of 500V look for minimum reading of 1 MOhm.
4. Test between joined conductors of low voltage side and the earth of the primary side at 500V Look for minimum of 1MOhm.
5. Test between conductors of low voltage side at 250V look for minimum reading of 0.5 MOhm.
When testing the conductors on the low voltage side at 250V this is including the transformer winding right?
I mean is this low 250V test a test of insulation resistance of cables but also including the resistance of the winding inside the transformer.
Is that right?
Thanks.
Testing the SELV for the original thread on Electricians Forums
Correct me if I am wrong but if we are to test a SELV transformer do we:
1. Join conductors of low voltage side of transformer together.
2. Join conductors of primary side of transformer together.
3. Test between these at a voltage of 500V look for minimum reading of 1 MOhm.
4. Test between joined conductors of low voltage side and the earth of the primary side at 500V Look for minimum of 1MOhm.
5. Test between conductors of low voltage side at 250V look for minimum reading of 0.5 MOhm.
When testing the conductors on the low voltage side at 250V this is including the transformer winding right?
I mean is this low 250V test a test of insulation resistance of cables but also including the resistance of the winding inside the transformer.
Is that right?
Thanks.
Testing the SELV for the original thread on Electricians Forums
