EATON Expulsion Fuse Refill Unit, Type BA2, 100E A, 15.5 kV

Description

Features:

• The refillable BA type (boric acid) high voltage expulsion fuse is an e-rated fuse that can be vented (outdoor) or enclosed (indoor)
• DE-ION® arc interruption permits application of the BA type power fuse over a range of system voltages
• This line of dropout fuses carries the boric acid principle of circuit protection to higher voltage ratings
• Main operating parts are the fusible element, arcing rod, helical spring and dry boric acid cylinder
• To prevent warping under outdoor conditions, a heavy glass epoxy or ceramic tube encloses the entire assembly
• This glass epoxy tube also assures adequate strength to contain the force of the arc interruption
• Within the fuse, the current path is maintained by tight electrical connections
• From the top ferrule, the path is through the extended spring and shunt assembly
• When the fuse element melts, the arcing rod is pulled upward drawing the arc into the boric acid cylinder
• As it strikes, intense heat from the arc decomposes the compressed boric acid powder
• Decomposition of the dry boric acid forms water vapor and boric acid anhydride
• The electrical interruption is caused by the steam cooling and de-ionizing the arc as it is drawn through the cylinder by the action of the spring and rod
• BA type fuses are of the refillable type
• When a fuse operates due to a fault blown, the fuse holder is removed with from the mounting
• After replacement of the refill unit, the fuse holder can be reinserted into the fuse mounting

Applications:

Standards/Approval:

• IEEE C37.41