Draw a circuit consisting of two transformers, one labeled HV, the other labeled Filament, and two double pole switches that will allow only the Filament transformer to be turned "ON" first and the HV transformer last and allowing only the HV transformer to be turned OFF first and then the Filaments last. The switches are labeled as S1 and S2. This may be simpler than it is stated.

Question

Draw a circuit consisting of two transformers, one labeled HV, the other labeled Filament, and two double pole switches that will allow only the Filament transformer to be turned "ON" first and the HV transformer last and allowing only the HV transformer to be turned OFF first and then the Filaments last.  The switches are labeled as S1 and S2.  This may be simpler than it is stated.

radar · Answer

In other words, it does not matter in which order the two switches are thrown, the filaments come on first, followed by High Voltage, and High-Voltage will turn off first and then Filaments last.|dw:1440262119437:dw|