De or het hulpinspanning?

The correct Dutch article is:

de hulpinspanning

Rule Words ending in -ing: almost always de. See the rule

How to use hulpinspanning

the hulpinspanningde hulpinspanning
this hulpinspanningdeze hulpinspanning
that hulpinspanningdie hulpinspanning
our hulpinspanningonze hulpinspanning
your hulpinspanningjouw hulpinspanning
every hulpinspanningelke hulpinspanning
which hulpinspanning?welke hulpinspanning?
a big hulpinspanning / the big hulpinspanningeen grote hulpinspanning, de grote hulpinspanning