Dears,
I am facing a problem with one of my power supplies that a voltage drop on the phase VS ground is coming down (207V) which supposed to be 220-230V. Phase to phase voltages are 380 V & phase to neutral voltages are 230, only one phase to gnd has a drop as below:
L1:Gnd : 207V (Drop)
L2:Gnd : 228V (OK)
L3:Gnd : 229V (OK)
My supply is three phase Y-transformer 380/230VAC, connected to residential building which have many 3-phase pumps, fans & compressors. This drop causing many panels which have the phase failure/monitoring relays to trip all the time because of phase unbalance. Any suggestions for a solution?
I am facing a problem with one of my power supplies that a voltage drop on the phase VS ground is coming down (207V) which supposed to be 220-230V. Phase to phase voltages are 380 V & phase to neutral voltages are 230, only one phase to gnd has a drop as below:
L1:Gnd : 207V (Drop)
L2:Gnd : 228V (OK)
L3:Gnd : 229V (OK)
My supply is three phase Y-transformer 380/230VAC, connected to residential building which have many 3-phase pumps, fans & compressors. This drop causing many panels which have the phase failure/monitoring relays to trip all the time because of phase unbalance. Any suggestions for a solution?