KLLU750 - 750Amp Fuse Description
KLLU750 - 750Amp Fuse
When your equipment calls for a 750A Class L time-delay fuse, matching the amperage is just the beginning. The KLLU750 is a 750-amp, current-limiting Class L fuse with a bolt-in design, a maximum rating of 600VAC and 300VDC, and time-delay operation intended to accommodate demanding startup conditions. If you're replacing an existing KLLU750, confirm the complete specification—not just 750A—including Class L construction, time-delay characteristics, AC/DC ratings, interrupting capacity, and bolt-in mounting.
Key Features and Benefits
- 750A continuous current rating for equipment specifically designed around a 750-amp Class L fuse.
- Time-delay opening characteristic helps accommodate temporary high-current conditions associated with large motor starting and other inductive loads.
- Manufacturer specifies a minimum 10-second time delay at 500% of the rated current.
- Rated for electrical systems up to 600VAC when all application requirements are met.
- Current-limiting design helps reduce damage to systems and equipment during short-circuit conditions.
- The manufacturer identifies motor branch-circuit protection as an appropriate KLLU Series application when the fuse is properly sized and applied.
- Bolt-in construction provides a defined mounting configuration for equipment compatibility checks.
- Non-indicating configuration for applications calling for a standard non-indicating Class L fuse.
Technical Specifications
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Catalog Number: KLLU750
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Manufacturer Description: FUS 600V T/D CLASS L 750A
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Series: KLLU
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Product Type: Time-Delay Current-Limiting Fuse
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Continuous Current Rating: 750A
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Maximum AC Voltage: 600VAC
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Maximum DC Voltage: 300VDC
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AC Interrupting Rating: 200,000A at 600VAC
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DC Interrupting Rating: 20,000A at 300VDC
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Opening Characteristic: Slo-Blo / Time Lag (T) / Time Delay
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Specified Time Delay: Minimum 10 seconds at 500% of rated current
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Fuse Class: Class L
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Family Style: Current Limiting
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Construction / Size: Bolt-In
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Indicating: No
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Mounting Method: Bolt-In
Material Compliance and Certifications
The manufacturer identifies the KLLU Series as UL Listed and states that its time-delay Class L fuses meet or exceed UL requirements for Class L fuses. The supplied KLLU750 information further confirms its 750A continuous current rating, Class L classification, current-limiting family style, time-delay opening characteristic, and bolt-in configuration.
Where It Works Best
The KLLU750 750A Class L fuse suits electrical equipment that requires a 750A, time-delay, current-limiting Class L fuse with bolt-in mounting. The manufacturer's application guidance specifically includes motor branch-circuit protection, where properly selected KLLU fuses may be sized close to motor full-load current to protect branch-circuit conductors, motor control equipment, and motors.
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Specifications
- Width:2.0
- Depth:2.0
- Height:8.125
- Amperes:750
- A.I.C. Rating & Volts:200 kA @ 600 V.AC
- Type:KLLU
- Additional Notes:Knife-blade Style, Non-Indicating, Time-Delay, current-limiting Class L Fuse
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