KLLU1500 - 1500Amp Fuse

KLLU1500 - 1500Amp Fuse

When you're replacing a 1500A Class L fuse, amperage is only the starting point. The KLLU1500 is a 1500-amp, time-delay, current-limiting Class L fuse built in a bolt-in configuration for equipment designed around these specific electrical and physical requirements. At the same time, its current-limiting design is intended to reduce short-circuit damage to systems and equipment. The manufacturer identifies the KLLU Series as UL Listed and states that it meets or exceeds UL requirements for Class L fuses. For replacement work, confirm the complete specification—1500A rating, Class L, time-delay operation, voltage, interrupting capacity, and bolt-in mounting—rather than choosing a fuse on amperage alone.

Key Features and Benefits

• 1500A continuous current rating for equipment specifically designed to use a 1500-amp Class L fuse.
• Class L fuse design provides a defined electrical and physical configuration for accurate replacement matching.
• Time-delay opening characteristic helps the fuse tolerate temporary high-current conditions associated with startup and inductive loads.
• The KLLU Series provides a minimum 10-second time delay at 500% of rated current, helping avoid unnecessary fuse operation during heavy starting currents.
• 600VAC maximum AC voltage gives technicians a clear voltage specification to compare with system requirements.
• Current-limiting operation reduces short-circuit damage to systems and connected equipment.
• Bolt-in construction and mounting make physical compatibility easy to specify and verify.
• Confirm the non-indicating configuration when matching the KLLU1500 to existing equipment.

Technical Specifications

• Catalog Number: KLLU1500
  
• Manufacturer Description: FUS 600V T/D CLASS L 1500A
  
• Series: KLLU
  
• Product Type: Class L Time-Delay Current-Limiting Fuse
  
• Continuous Current Rating: 1500A
  
• Maximum AC Voltage: 600VAC
  
• Maximum DC Voltage: 300VDC
  
• AC Interrupting Rating: 200,000A at 600VAC
  
• DC Interrupting Rating: 20,000A at 300VDC
  
• Opening Characteristic: Slo-Blo / Time Lag (T) / Time Delay
  
• Series Time-Delay Characteristic: Minimum 10 seconds at 500% of rated current
  
• Fuse Class: Class L
  
• Family Style: Current Limiting
  
• Construction / Size: Bolt-In
  
• Indicating: No
  
• Mounting Method: Bolt-In
  

Material Compliance and Certifications

The manufacturer identifies the KLLU Series as UL Listed and states that the series meets or exceeds UL requirements for Class L fuses. The supplied KLLU1500 information further identifies the product as a Class L, time-delay, current-limiting fuse with bolt-in construction and the electrical ratings shown above.

Where It Works Best

The KLLU1500 suits electrical equipment designed for a 1500A Class L, time-delay, current-limiting fuse with bolt-in mounting. Its time-delay characteristics are especially relevant in properly engineered circuits where temporary starting current from large motors or other inductive loads needs to be accommodated without unnecessary fuse operation. The manufacturer also identifies KLLU fuses as suitable for motor branch-circuit protection when correctly sized and applied.