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What is the effect of applying 50 HZ to a transformer designed for 60 ?

Hey Scotty, you owe me a beer. For everyone that tried to help thank you very much. We just found and solved the problem. The problem was not an undersized transformer, the voltage drop was coming from a wrong wire from the humidifier to the humidistat installed about 80 mts away from each...

The voltage in the primary is 470 V when 13.5 V in the secondary. The supply panel is close to 3 mts from humidifier.

The Inrush VA´s for those contactors is 60 and the Sealed VA´s 6. I used a formula that considers both values and the outcome is 40 VA´s that is why I picked a 50 VA transformer. Are you telling me I should have selected something bigger than the 120 VA´s (inrush) of both contactors coils ?

Thanks Raith but we already did that, each coil is taking about 10 VA each. The transformer is far from saturated.

We are using 440/24 V 50 VA in a 30 KW (2 steps) humidifiers. When starting the second step the secondary voltage drops to about 13.5 Volts and the contactor couldnt close contacts and work properly. Why could this be happening if we have measured the 440 V in the primary and the 24 Volts in...

What is the code/norm that allows using a 2 pole contactor in a 3 phase application? (leaving one line "hot", not interrupted) Thanks