Oak Bluffs, MA old classifieds archive and funnies > Funny Listings
> Abb low voltage capicator C484D7.5-3 fi
Abb low voltage capicator C484D7.5-3 fi
Principal Components of a 3-Phase Capacitor
The principal components of a 3-phase ABB capacitor include:
1. Sequential Protection System:
• Self-Healing Capacitor Elements
One or more self-healing capacitor elements are installed for each phase. These
elements are connected in Y or
Δ. In case of dielectric breakdown, the fault
is cleared by evaporation of the metalized layer around the breakdown with
negligible loss of capacitance and continued operation of the capacitor!
• Internally Protected Elements
A unique Sequential Protection System including the IPE design (IPE - internally
protected elements) ensures that each individual element can be disconnected
from the circuit at the end of the element’s life.
• Nonfl ammable Dry Vermiculite Filler
Vermiculite is a dry, granular insulating material that is solid, inert and fi re proof.
This material fi lls all open spaces in the enclosure to isolate the capacitor
elements and exclude free oxygen.
Discharge resistors (one for each phase) are sized to ensure safe discharge of the
capacitor to less than 50 volts in one minute or less as required by the NEC.
Large terminal studs are located inside the enclosure at the top of the capacitor
for quick and easy cable connections.
All ABB enclosures are made of welded heavy gauge steel. Available enclosure
types include Indoor NEMA 1, Outdoor Raintight, and Indoor Dusttight. (RAL
