QSP24BL

QSP24BL is a single phase dual voltage static transfer switch (STS), which is designed for interconecting two sources, such as utility and generator. STS can automatically and rapidly transfer the load from the primary source to the secondary source, and switch back again if the primary source is available. This QSP24BL device is manufactured by Littelfuse Inc. and it offers multiple features such as safe isolation, long life cycle, and extraordinary combination of power and intelligence.

Applications

QSP24BL static transfer switch is mainly used to supply power for control systems, industrial and military applications, computer systems, process control, in-traffic comunication, broadcast radio, outdoor security systems, and emergency lighting systems.

Working Principle

When the load is supplied by the primary source, the input voltage will be detected by the STS. If there is a sudden power failure of the primary source, the output voltage will be transferred to the secondary source. When the voltage of the primary source is restored and reaches the regular voltage value, the STS will detect the input voltage and switch the load back to the primary source.

The mechanical array is very important for QSP24BL. When the input voltage drops below a fixed value, the load will be transferred to the secondary source. The mechanical array will control the primary and secondary inputs, and the outputs. It is durably constructed to ensure reliable operation and long service life.

When the load transfer occurs, the STS plays an important role. Whenever the primary source trips below the tripping range, the STS will detect the input voltage and switch the load to the secondary source. At the same time, the STS also constantly monitors the input voltage of the primary source and the secondary source. When the primary source is restored to its normal voltage and frequency, the STS will switch back the load to the primary source. This process ensures that the load passes between the two sources safely.

Conclusion

QSP24BL static transfer switch offers safe isolation, long life cycle, and extraordinary combination of power and intelligence. Its applications include control systems, industrial and military applications, computer systems, process control, in-traffic comunication, and more. It works by detecting the input voltage and switching the load to the secondary source when the voltage of the primary source drops below the fixed tripping range. When the primary source is restored, the STS will switch the load back to the primary source.