KLLU700 - 700Amp Fuse

KLLU700 - 700Amp Fuse

A 700A fuse is only the right replacement when your electrical and physical specifications match, too. The KLLU700 is a 700-amp Class L time-delay, current-limiting fuse with bolt-in construction, rated for up to 600VAC and 300VDC. The KLLU700 also limits current during short-circuit conditions, reducing potential damage to systems and equipment. For maintenance teams, contractors, and facility personnel looking for the correct KLLU700 replacement, the important match points are straightforward: 700A, Class L, time-delay operation, voltage and interrupting ratings, and bolt-in mounting.

Key Features and Benefits

• 700A continuous current rating for electrical equipment designed to use a 700-amp Class L fuse.
• Class L time-delay design provides the opening characteristic specified for the KLLU700.
• Handles systems rated up to 600VAC when all other application requirements are satisfied.
• Rated for a maximum of 300VDC, with a 20,000A interrupting rating at 300VDC.
• Manufacturer-specified minimum 10-second time delay at 500% of rating helps accommodate heavy starting currents from large motors and other inductive loads.
• Current-limiting construction reduces short-circuit damage to electrical systems and equipment.
• Bolt-in mounting provides a clearly defined physical configuration for compatibility checks.
• Non-indicating design for equipment requiring a standard non-indicating Class L fuse.

Technical Specifications

• Catalog Number: KLLU700
  
• Manufacturer Description: FUS 600V T/D CLASS L 700A
  
• Series: KLLU
  
• Product Type: Time-Delay Current-Limiting Fuse
  
• Continuous Current Rating: 700A
  
• 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
  
• Specified Time Delay: 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 these time-delay Class L fuses meet or exceed UL requirements for Class L fuses. The supplied specifications identify the KLLU700 as a Class L, current-limiting, time-delay fuse with a 700A continuous current rating and bolt-in construction.

Where It Works Best

The KLLU700 700A Class L fuse is best suited to electrical equipment specifically designed around a 700A, bolt-in, time-delay Class L fuse with the corresponding voltage and interrupting requirements. The manufacturer specifically identifies motor branch-circuit protection as an application for KLLU Series fuses and states that they may be sized close to motor full-load current when properly applied. Combined with the specified minimum 10-second delay at 500% of rating, this makes the KLLU700 particularly relevant to properly engineered circuits involving large motors and other inductive loads with substantial starting current.