I work on a industry as an intern and I'm having a trouble. Clearly there's a fault on the net, but I can't figure out which type it is since I'm having strange readings from a basic multimeter. I'm in Minas Gerais, on Brazil, where each phase have 127 V and here it's a very common practice the neutral grounded (there's no difference between the ground and neutral). So, let's go on.
When I measure each live to neutral it gives me 127 V, also does ground to neutral.
When I measure each live to ground:
A to GND: 220 V
B to GND: 0 V
C to GND: 220 V
Neutral to GND: 127 V
If we change the reference a possible voltage on conductors are as follows:
A: 127 /-120°
B: 127 /0°
C: 127 /120°
GND: 127 /0°
Anyone have an idea of what's my problem? What's the simplest/cheapest way to solve it?
Thx very much