Assertion: light bulb's ballast | /r/HasProperty | step-up autotransformer
Facets:
value: often
type: TEMPORAL
value: with substantial leakage inductance
type: OTHER
Source sentences:
text: Where the AC voltage is insufficient to start long fluorescent lamps, the ballast is often a step-up autotransformer with substantial leakage inductance (so as to limit the current flow).