Why is STS static transfer switch recommended for dual power supply?

In industrial computer rooms, communication base stations, commercial buildings and other scenes that require high reliability of power supply, dual 

power supply has become a standard. Many people think that power supply redundancy can be realized as long as two independent power supplies 

are connected, but it is not-the switching link between the two power supplies is the key to determine the continuity of power supply. It is also a dual-

power architecture. With STS static transfer switch and traditional switching devices, the gap between reliability and experience in actual operation is 

obvious.

Traditional dual power supply switching mostly relies on manual/automatic switching of mechanical switches, contactors or circuit breakers. The inh-

erent shortcomings of this kind of scheme are obvious: the mechanical structure moves slowly, and the switching time generally ranges from tens of 

milliseconds to several seconds. For servers, precision instruments and medical equipment, which are sensitive to power supply fluctuations, even a 

power outage of more than ten milliseconds may cause equipment restart, data loss and production interruption. At the same time, the repeated 

action of mechanical contacts is prone to arc and wear, which not only has limited service life, but also has potential safety hazards such as poor 

contact and ignition, and the reliability of long-term operation will gradually decline. More importantly, most traditional switching devices can only 

identify complete power failure, and can't respond to power quality problems such as voltage sag, overvoltage and undervoltage in time. The load 

will run under abnormal voltage for a long time, which will accelerate the aging of equipment.

The emergence of STS static transfer switch is just to solve these pain points of traditional dual power supply switching. It adopts semiconductor 

contactless switching architecture, and there is no mechanical action process, and the switching speed can reach millisecond level. Most industrial-

grade models can complete the switching of main and standby power supplies within 5 milliseconds, and the load end of the whole process is comp-

letely unaware, truly realizing seamless power supply redundancy. In addition to power-off switching, STS can also monitor the voltage, frequency and 

other parameters of the two power supplies in real time. In case of overvoltage, undervoltage, voltage sag and other anomalies, STS will automatically 

switch to the normal one-way power supply to actively protect the back-end load from power quality problems. Because there is no mechanical wear, 

STS has a longer service life and lower maintenance cost, which is suitable for long-term uninterrupted operation.

For standard rack deployment scenarios such as computer rooms and base stations, the advantages of rack STS are more prominent. It adopts standard 

19-inch rack structure, can be directly installed in the server cabinet, does not need to occupy additional floor space, has regular internal wiring, and is 

perfectly integrated with the cabinet power distribution system. At the same time, rack models are generally equipped with status display, fault alarm, 

communication monitoring and other functions, which can access the centralized management system of the computer room, and the operation and 

maintenance personnel can remotely check the operation status and receive fault reminders, greatly improving the operation and maintenance effici-

ency of the distribution system.

Of course, there are some important points to pay attention to when choosing STS static transfer switch. The power selection should be based on the 

rated capacity, and an appropriate margin should be reserved to avoid long-term full-load operation; According to the power supply system, the 

corresponding number of poles is selected, and the 4P model is preferred in the three-phase four-wire scene to ensure the synchronous switching of 

the zero line; Products with complete protection mechanisms, such as overvoltage, undervoltage, overcurrent and short circuit, are preferred for ind-

ustrial and key scenarios to further improve operational reliability.

Generally speaking, the core value of dual power supply is "uninterrupted", and STS static transfer switch is the key component to implement this value. 

Baoweite's full range of rack-mounted STS static transfer switch covers multiple power levels and pole specifications, adopts silicon-controlled contactless 

architecture, seamlessly switches in milliseconds, comes standard with multiple protection mechanisms, supports communication monitoring and 

expansion, and can be widely adapted to various dual power supply scenarios such as computer rooms, base stations, industries and businesses, so as to 

protect reliable power supply.

If you need type selection and transformation, you can consult Baoweite for the scheme. Thank you for browsing. You can collect official website of 

Shenzhen Baoweite Power Supply Co., Ltd.