5STP 800

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Fuses are commonly used devices in electrical circuits for protecting equipment from excessive currents due to overloads or electrical faults. They are simple, reliable, and have been in use for many years. The 5STP 800 application field and working principle of fuses are discussed below.

1. What is 5STP 800 fuse?

5STP 800 fuse is a type of resin-filled fused product. It is suitable for protecting electric circuit of motor-type electrical equipments, especially for power transformer and generator. 5STP 800 fuse is an environment-friendly, non-combustible, and economical fuse.

2. The Application Field

5STP 800 fuse is an important overload, short-circuits, and isolation protection device for high-voltage electrical distribution systems. It can provide reliable over-temperature protection for equipment or areas with high ambient temperatures and the topologies used in grids can also be used within electric power systems. It can be used in air power switch, disconnector, line switch, busbar, and multiple sub-switch combinations. It can protect equipment above 690/1100V of AC 50Hz or 60Hz, such as power transformers, generators, electric motors, air switches, and vapor boxes.

3. Performance Indexes

5STP 800 fuses are designed to meet the requirements of IEC269-2 standards and the US National Electric Code. They can withstand short-circuit currents of up to 80 kA and voltage ratings of up to 690V AC. They have a fast response time, providing the necessary protection without disrupting critical operations or damaging sensitive equipment. Additionally, the fuses are designed to last up to 10,000 operations.

4. Working Principle

5STP 800 fuse is a type of thermal fuse, which works according to the principle of thermal overload protection. When the current in the circuit increases due to overload or short circuit, the temperature of the fuse element would rise and cause the fuse element to vaporize or melt, resulting in the breaking off of the electric circuit. The element is usually made of lead-free alloy, so it will not generate toxic substances when it is melted, thus minimizing environmental pollution.

5. Installation and Maintenance

5STP 800 fuse should be installed in the correct position, and all mounting hardware should be fixed properly. The fuse and connecting wires should be checked before installation, to make sure they are in good condition. After installation, the contact pressure at the connecting point should be checked and measured, to make sure that the circuit connection is reliable and secure. The fuse body should be inspected regularly, and the physical condition of the terminal should be checked before the fuse is used.

To conclude, the 5STP 800 fuse is a reliable and economical way to protect electrical circuits and equipment from overloads or electrical faults. It has an environmental friendly feature, which makes it an ideal choice for protection in high ambient temperature areas. Its fast responding time and long service life make it ideal for large electrical supply systems.

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