RWR71S1210FRBSL

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Time-delay fuses, also known as molten metal fuses, are an important type of current limiting electrical devices used in high-voltage and medium-voltage power systems. TheRWR71S1210FRBSL Through Hole Resistor is one such time-delay fuse that is specifically used for motor protection. Used in motor start-up, protection against overloads and emergency situations, RWR71S1210FRBSL offers reliable and effective protection against motor short circuits and also serves to detect and interrupt short-circuit currents.

The RWR71S1210FRBSL Through Hole Resistor consists of three main components: the fuse element, the primary fusible element and the secondary fusible element. The fuse element is a cylindrical copper or aluminum tube encapsulated in a clear silicone resin. This creates a time-delay function which prevents the fuse from blowing under normal conditions. The primary fusible element is a bimetallic strip composed of two metals that will bend and open when a high temperature is reached. This allows the current to be interrupted upon detection of a short circuit. The secondary fusible element consists of two melting contacts that will open when the set temperature, current or voltage is exceeded. This serves as additional protection against short circuits.

The RWR71S1210FRBSL Through Hole Resistor is designed to meet the latest standards of overcurrent and short-circuit protection. The NFPA standard is set at 140kA 3-phase short circuit current dive and the IEC standard is set at 1.5 times higher than the NFPA standard. The RWR71S1210FRBSL can also be configured with a rated current of up to 200A to ensure adequate protection of the motor. As the fuse element is encapsulated in a clear silicone resin, the RWR71S1210FRBSL can withstand the harsh conditions of high-voltage and medium-voltage power systems without the risk of igniting.

In terms of working principle, the RWR71S1210FRBSL Through Hole Resistor operates by detecting and interrupting the short-circuit current. Upon detection of a short circuit, the primary fusible element heats up rapidly and bends open to interrupt the current, resulting in a period of interruption. At this period of interruption, the secondary fusible element will melt to open the contacts and permanently interrupt the current. This stops any further damage to the motor and protects the motor components from any risk of overheating.

In its application field, the RWR71S1210FRBSL Through Hole Resistor is a robust fuse used in motor protection for motor start-up, protection against overloads and emergency situations. It is also used to detect and interrupt potential short-circuit currents. The motor protection fuse can be installed in primary or secondary circuits and is designed to offer reliable and effective short-circuit protection for motor runs. It is specified with a rated current of up to 200A and is compatible with all medium-voltage and high-voltage power systems.

In conclusion, the RWR71S1210FRBSL Through Hole Resistor is an extremely important device used in motor protection. It consists of three main components: the fuse element, the primary fusible element and the secondary fusible element. In terms of working principle, it operates by detecting and interrupting short-circuit currents. In its application field, it is used for motor start-up, protection against overloads and emergency situations. It is specified with a rated current of up to 200A and is compatible with all medium-voltage and high-voltage power systems.

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