Knocks out a three-phase 40 A circuit breaker in front of the voltage stabilizers

Sergey asks:

Good afternoon. I have the following situation. A private house. There is a heat pump 3ph for 5 kW consumed, plus an electric boiler 3ph for 18 kW, an electric stove 5 kW, an air conditioner 1.7 kW. At the entrance to the house there are 3 voltage stabilizers of 11kw each. And in front of him is a 40a machine gun.

At first, the problem was - since at the end of the line connected to the transformer, the input voltage on one phase dropped to 167 W. And as a result, this phase (stabilizer) was often knocked out on the apparatus. It got up to 40 amps with an input of up to 167 watts. This is the reading on the voltage regulator.

Then we changed the transformer and the input voltage on all phases is good 217 - 237 W.

During the reconnection of the transformer, the phases were reversed at the input to the house on the pole. I had to throw wires inside the house at the entrance to the heat pump. Gave a phase error.

Now the stabilizers are working fine, but the problem is that the 40 amp machine often knocks out. Which is in front of connecting the stabilizers.

I watched the stabilizers. When the Electric boiler turns on, the voltage is 25 - 27 amp on two phases.

On the Electric Boiler, one thread of the awning glows and on the stabilizers 25 - 27 amp. 2 stabilizers.

Electric boiler There is a maximum of 3 tents.

I hope you can explain the reason.

With UV. Sergei.