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ALPIVAR 2 : CONNECTION AND PROTECTION DEVICES
Connection
The easy accessibility of the terminals on the top of the
unit make the Alpivar 2 capacitor very easy to connect.
The use of a system of "socket" terminals enables
direct connection of the unit via cables and lugs.
The Alpivar 2 double-insulated or class 2 capacitor
does not need earthing.
C onnection
terminals
Internal
discharge
resistor
LOW VOLTAGE RANGE
Electrical protection devices
Self-healing dielectric: This self-healing property is
connected with the characteristics of the metal deposit
which forms the electrode and the nature of the
insulating support (polypropylene film).
This special manufacturing technique prevents
breakdown of the capacitor due to electrical
overvoltages. In fact overvoltages perforate the
dielectric and cause discharges which vaporise the
metal near the short circuit, thus instantaneously
restoring the electrical insulation.
Self-healing coil
Self-extinguishing
polyurethane resin
vacuum coating
Internal fuses: One per winding.
Pressure monitoring devices: If an electrical fault
cannot be overcome by the film self-healing or by
means of the electric fuse, gas is emitted, causing
a membrane to deform and disconnecting the faulty
winding. The triggering of the pressure monitoring
devices is visible from outside the capacitor. This
feature makes it easy to carry out a quick check on the
status of the unit.
Self-extinguishing
plastic casing
These three protection devices, together with the
vacuum coating of the windings (technique patented by
LEGRAND), result in a very high-tech unit.
Overpressure
disconnection
device with visible
trip indication
Electric fuse
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