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450-24R-2B-2.75 PDF预览

450-24R-2B-2.75

更新时间： 2024-10-27 22:11:07
品牌 Logo 应用领域
力特 - LITTELFUSE /
页数 文件大小 规格书
12页 345K
描述
Medium Voltage Fuses

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450-24R-2B-2.75 技术参数

生命周期：ActiveReach Compliance Code：unknown
ECCN代码：EAR99风险等级：5.76
其他特性：RATED BREAKING CAPACITY=1950A-80000A熔断特性：MEDIUM
主体高度：330.2 mm主体长度或直径：187.96 mm
内置特性：INDICATOR电路保护类型：ELECTRIC FUSE
安装特点：INLINE/HOLDER物理尺寸：187.96mm x 330.2mm
额定分断能力：1950 A额定电流：450 A
额定电压（交流）：2750 V表面贴装：NO
端子形状：TAB/BLADEBase Number Matches：1

450-24R-2B-2.75 数据手册

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Medium Voltage Fuses  
ꢀ
2400 - 25,500 VAC Current Limiting  
Current limiting “E” and “R”  
rated fuses are equipped with  
a mechanical indicator or  
striker pin that protrudes  
through the fuse cap upon  
operation of the fuse. This  
provides visual identification  
of a blown fuse and can be  
used as a trigger for external  
devices.  
GENERAL INFORMATION  
The terms “Medium Voltage” and “high voltage” have been  
used interchangeably by many people to describe fuses  
operating above 600 volts. Technically speaking, “medium  
voltage” fuses are those intended for the voltage range from  
2,400 to 38,000 VAC. “High voltage fuses are for circuits  
carrying voltages greater than 38,000 VAC.  
“E” Rated fuses are considered to be general purpose fuses  
and can be used to protect against low and high values of  
fault current. “R” rated fuses are designed for back-up pro-  
tection. They must be used in series with other devices, such  
as motor overload relays, in order to achieve both overload  
and short circuit protection.  
Medium voltage fuses are not intended to provide overload  
protection in the same sense as fuses rated 600 volts or  
less. Medium voltage fuse current ratings do not have the  
same meanings as the ampere ratings of low voltage fuses.  
Littelfuse now offers a complete selection of “E” and “R”  
rated medium voltage fuses for the protection of trans-  
formers, potential transformers, feeders, and motor circuits.  
Single, double, and triple barrel designs are available to  
cover a wide range of current, voltage, and interrupting  
ratings. Conventional ferrule type, clip lock, and bolt-in  
mounting configurations are now available for virtually any  
application. Hermetically sealed fuses for use in hazardous  
environments are also offered.  
All medium voltage fuses are limited in their ability to inter-  
rupt low value overcurrents, especially those between 100%  
and 200% of the fuse’s continuous current rating. They are  
designed to carry their rated current without exceeding the  
temperature rise permitted by NEMA and ANSI standards.  
Additional application data can be found in the Fuse  
Application section of the POWR-GARD Products  
catalog (PF101).  
Contact the factory or your local Littelfuse representative for  
additional fuse ratings or custom mounting configurations.  
24 Hour Emergency Service is available.  
Call 1-800-227-0029.  
APPLICATIONS  
ꢀ
Power Transformer  
Protection  
ꢀ
Potential Transformer  
Protection  
ꢀ
Motor Controller Back-up  
Protection  
ꢀ
Fused Switches  
ꢀ
Feeder Circuits  
Bolt-in Mount Fuses  
61  
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