252150R3 - S&C Electric SM-4 100E 14.4kV Slow Power Fuse Refill Unit

252150R3

252150R3 is an S&C Electric SM-4 Power Fuse Refill Unit designed for reliable overcurrent protection in outdoor distribution and substation applications. This slow-speed fuse unit is rated 100 amperes continuous and 14.4 kV nominal, offering precise melting time-current characteristics with only 10% total tolerance in melting current. The SM-4 Refill Unit features a silver or pretensioned nickel-chrome current-responsive fusible element drawn through precision dies to accurate diameters, with solderless construction brazed into terminals. Fast, positive fault interruption is achieved through high-speed elongation of the arc in the solid-material-lined bore and efficient deionizing action of gases generated through thermal reaction of the solid material. For low-magnitude faults, the large-diameter auxiliary bore delays arc extinction until sufficient gap is attained, precluding reignition in the main bore. For moderate-to-high faults, the arc is lengthened as the main rod is drawn upward into the main bore, with the large circumference providing greater surface exposure of the arc-extinguishing medium.

• Part Number: 252150R3
• Manufacturer: S&C Electric
• Fuse Type: SM-4 Refill Unit
• Continuous Current Rating: 100 amperes
• Voltage Rating: 14.4 kV nominal
• Speed Classification: Slow
• Fusible Element: Silver or pretensioned nickel-chrome
• Construction: Solderless, brazed terminals
• Melting Current Tolerance: 10% total tolerance
• Application: Outdoor distribution and substation protection

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Specifications

• Part Number: 252150R3
• Manufacturer : S&C Electric
• Brand : S&C Electric
• Category : Fuse
• Item Subcategory : Medium Voltage
• Type : SM-4
• Voltage : 14400
• Amperage : 100
• Class Rating : E
• Velocity : Slow

Product Data

• Weight : 2