voltmeter. If the connection is correct, the voltmeter will
read zero. If the voltmeter reads something other than
zero, check all primary and secondary connections to
make sure they are connected exactly as indicated by the
manufacturer.
The primary on the example transformer has two
winding ; therefore, it can also be connected for a 240-V
supply. The primary winding must be placed in parallel
by connecting HI to H3 and H2 to H4. If this is not done
as indicated on the transformer nameplate, the magnetic
fields created by each winding will oppose each other.
The magnetic fields work together when the winding
are properly placed in parallel.