ganutenator
Lifetime Supporting Member
I work for an OEM.
The OEM has a test site.
We wanted to test a single phase vfd. (reason, they were offered in the 1/4 hp where as the 3 phase ones were not)
We left the original 3 phase Telemechanique mtr disconnect feeding the line leads of the vfd in place but only connected two phases.
The mtr disconnect kept tripping.
A panel builder supplier recommended looping one of the legs of the disconnect back up to the top like the auto cad drawing attached.
The OEM has a test site.
We wanted to test a single phase vfd. (reason, they were offered in the 1/4 hp where as the 3 phase ones were not)
We left the original 3 phase Telemechanique mtr disconnect feeding the line leads of the vfd in place but only connected two phases.
The mtr disconnect kept tripping.
A panel builder supplier recommended looping one of the legs of the disconnect back up to the top like the auto cad drawing attached.