Hi there,
I was wondering whether someone may be able to help me with an issue I have come across.
I am testing an installation for compliance for a sale of property. It is a farm and is supplied by an Eskom 3 phase transformer.
It is a 40A 3 phase supply.
When I test from neutral to red I get 230V, neutral to yellow 230V and neutral to blue 230V.
When I test from earth to red I get 230V, earth to yellow 230V and earth to blue 230V.
When I test from red to yellow I get 412V, red to blue 411V. Now when I test from yellow to blue I get 0V!!
How is this possible??
I have tested right back at the Eskom box and I get this same result even at the meters in the Eskom box.
I cannot test the top of the Eskom breakers as they are locked with tags.
Someone please help shed some light on this.
Luckily, at present, there is no 3 phase equipment installed on the premises, however the new owners may well install a 3 phase pump or something and then I would be sure that they would start having problems!
Many thanks
Simon