USCG Exam PracticeBatteries and storage systems
A vessel's battery charger operates at a voltage exceeding 20 percent of the line voltage. Under 46 CFR §111.15-30, which type of charger is exempt from the requirement for automatic protection against reversal of current?
- A. A charger incorporating a grounded autotransformer
- B. A charger connected to a large battery installation
- ✓ A converterCorrect
- D. A charger connected to a moderate battery installation in a battery room
Why C is correct
46 CFR §111.15-30 states that except for converters, chargers with a voltage exceeding 20 percent of the line voltage must be provided with automatic protection against reversal of current. Converters are the only type explicitly exempted. Grounded autotransformer chargers are prohibited entirely under the same section.
Cited:46 CFR §111.15-30