Why live to ground voltage is only 0V (in a 220V AC power outlet, there is also electric shock)?

[KelvinGaliny]

Hello, my name is Kelvin. I'm a trainee hydraulic engineer in Indonesia. I apologize if this question has been answered before / if this question is too basic. So we have a problem with electric shock coming from an electric panel. This panel runs on 220V AC supply & is used to run an inverter (single phase input & three phase output) to run a three phase electric motor. We checked the supply voltage from live to neutral, live to ground & neutral to ground. The result is shown below:

then we checked the electric outlet where the power for the panel is coming from. We measured the voltage again, but the result for 'live to ground' voltage is different

As you can see, the voltage from live to ground at the power outlet is only 0V, but the one in the electric panel is 133V
Are there any possible reasons for this to be happening? Might this the reason an electric shock is happening on the panel?
Here is the electrical diagram for the panel.


Thank you in advance for your help, any sorts of comments are appreciated

 

[James]

looks like a broken ground connection to me.
measure from ground at outlet to ground at machine and I expect you will find 100v or more.

 

[KelvinGaliny]

looks like a broken ground connection to me.
measure from ground at outlet to ground at machine and I expect you will find 100v or more.

Thank you, how did I not think about measuring between those points...