TPH-500 Circuit Protection

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TPH-500 Application Field and Working Principle

The TPH-500 fuse is an electrical specialty fuse designed to protect circuits and equipment against overload and short circuit currents. It is a fast-acting, low-resistance, force-controlled fuse, making it ideal for both residential and commercial service. The TPH-500 fuse is a two-part, fused element, consisting of a body and a contact element.

Application Field

The TPH-500 fuse is designed for use in panelboards, motor control centers, switches, switchgear, and other apparatus where circuit protection is required. It is UL listed and CSA certified to UL 1948, Canada standard C22.2 No. 18.1, and IEC 60269 for 600 volts. The TPH-500 fuse has a voltage rating of up to 600 volts and is available in a variety of amperages, from 10 to 500 amps.

Design Features

The TPH-500 fuse design offers numerous features, such as a high interrupting rating, minimal clearing faults, and a design that reduces heating while operating under normal conditions. In addition, the design allows for easy terminal access and superior current-limiting performance. The fuse element is designed for quick replacement in the field, and the two-piece construction eliminates the need to shut down the service in order to replace a fuse.

Working Principle

The TPH-500 fuse utilizes a force-controlled design that is able to sense and rapidly react to the flow of current. When the current flow exceeds the fuse’s rating, the heat generated by the current causes a magnetic force to expand, causing the contact element to move outward and open the circuit. This process occurs in a fraction of a second, limiting the amount of heat buildup and protecting the circuit or equipment connected to it. The TPH-500 fuse is designed to reset itself automatically, allowing for continued use of the circuit or equipment it is protecting.

Conclusion

The TPH-500 fuse is a fast-acting, force-controlled fuse designed to protect circuits and equipment from overloads and short circuits. Its two-part construction, high interrupting rating, quick response time, and automatic resetting ability make it ideal for a variety of residential and commercial applications. The TPH-500 is UL listed and CSA certified for voltage ratings up to 600 volts and amperage ratings from 10 to 500 amps.

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