EF400M500

Applications:	Electrical, Industrial
Melting I²t:	1200000
Size / Dimension:	2.913" Dia x 3.051" L (74.00mm x 77.50mm)
Package / Case:	Cylindrical, Blade Terminal (Bolt)
Mounting Type:	Bolt Mount
Breaking Capacity @ Rated Voltage:	80kA
Operating Temperature:	--
Approvals:	--
Class:	--
Features:	--
Series:	EF
Response Time:	--
Voltage Rating - AC:	550V
Current Rating:	500A
Fuse Type:	Cartridge
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Electrical, Specialty Fuses: EF400M500 Application Field and Working Principle

The EF400M500 is a 500-volt, 400-amp electrical fuse. This type of fuse is classified as a specialty fuse because of its unique construction and restrictions on its usage. Specialty fuses are designed to handle high-voltage electrical currents or circuits where standard fuses may be inadequate. It is important to understand the application and working principle of the EF400M500 to ensure that it is used safely and efficiently.The EF400M500 is designed for use in the electrical industry as a safety device. It is installed in high-voltage circuits to protect the circuit and its components from an overload of electric current. If the current passing through the fuse exceeds its rating, the fuse will blow, stopping the flow of current and thus preventing any damage to the circuit.The EF400M500 has a unique design. It is made from copper or aluminum and encapsulated in a polyethyleal-ether-ester casing. The casing is designed to provide several layers of protection against electrical shock. Inside the casing is an internal heat-sensing element made from a thin ribbon of stainless steel or graphite. This element monitors the flow of current through the fuse and will trigger the expulsion mechanism if the current exceeds the rated 500 volts. When the current passes through the fuse, the heat generated by the current causes thermal expansion of the internal element. This causes an increase in pressure. If the pressure reaches the rated value of the fuse (500 volts), the internal component will break, causing the expulsion mechanism to be triggered. The expulsion mechanism is a small plunger which forces the contacts inside the fuse open. This breaks the connection, preventing further current from passing through the circuit and allowing the heat to dissipate.The EF400M500 is suitable for a wide variety of electrical installations. It can be used in circuits with a voltage of up to 500 V and a current of up to 400 A. It is also suitable for use in circuits that require a slow-blow response time, such as those involved in motor control systems. The EF400M500 is especially recommended for circuits that are exposed to rough or hazardous working conditions.The EF400M500 is a reliable fuse which can handle high currents without causing circuit damage. It is also relatively easy to install and maintain. Before installation, however, it is important to understand the working principles of the EF400M500 and make sure that it is suitable for the application in question. It is also important to check for any local regulations that may apply to the use of the EF400M500. Overall, the EF400M500 is a specialized electrical fuse designed to provide protection in high-voltage, high-current circuits. Its main advantages are its robust design and its ability to handle high currents without causing circuit damage. By understanding the application and working principles of the EF400M500, it can be used safely and effectively in electrical installations.

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