TR3-S505SC-5-R

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Introduction

The TR3-S505SC-5-R fuse is a current limiting device designed for use in motor control, high power and high amperage applications. It follows the UL/CSA standards for current limiting, and is suitable for service entrance, distribution and commercial panel board, substation switchgear, motor control center and other industrial applications. The fuse is made up of three components: the base, the fuse element, and the end plate. The base and end plate serve as an enclosure for the fuse element, helping to ensure safe and efficient operation.

Application Field

Fuses provide electrical protection for motors, lighting, and any other loads in power distribution systems. The TR3-S505SC-5-R fuse serves as an over-current protection device for the application of all three-phase 480VAC or less circuit. It is designed for the use of low voltage systems including resistive, inductive and capacitive circuits with high power requirements. It is suitable for the motor starter, feeder circuits, branch circuit over-current protection, windings, starters and transformer protection. In addition, it is compatible with UL489 and UL943 standards for branch circuit protection.

Working Principle

The TR3-S505SC-5-R is an automatic resetting, self-extinguishing type fuse. It operates on a thermistor-reset principle; the fuse trips open, interrupting the electric circuit and limiting the flow of current in the event of an over-current condition. The operating temperature is determined by sensing the temperature of the fuse element with a thermistor, causing the fuse element to open at a predetermined temperature, typically above the required current rating.

The resetting process is initiated by a thermistor reset cycle. As the fuse element cools, the thermistor connects again, allowing the current to travel through it and reset the circuit. This allows the fuse to be reset and used again, ensuring safe and reliable operation.

Features and Benefits

The TR3-S505SC-5-R fuse is an incredibly reliable and robust fuse that provides users with excellent protection and safety. The fuse is UL/CSA compliant and rated for use in temperatures up to 105°C, ensuring maximum safety and reliability. It has a narrow operating range for a quick response time, allowing the fuse to quickly interrupt a potentially hazardous current and protect critical components.

The TR3-S505SC-5-R fuse also features a replaceable fuse element, which allows users to replace a burned-out fuse element with a new one, restoring the fuse to working order and preserving its serviceable life. Furthermore, the device is impact resistant and offers complete arc extinguishing, ensuring long service life and eliminating the risk of potential property damage due to an electrical fire.

Conclusion

The TR3-S505SC-5-R fuse is designed for use in motor control, high-power and high-amperage applications, providing users with efficient protection and long-term reliability. It follows the UL/CSA standards for current limiting, and is examined and tested in accordance with the standards for UL489 and UL943, ensuring consistent safety and performance. The fuse has a narrow operating range, high-breaking capacity, replaceable fuse element, and impact-resistant design, making it an ideal choice for various applications that require safety and reliability.

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