STS static transfer switch: the core of dual power supply system and the key to keep uninterrupted power supply.

‍In industrial computer rooms, communication base stations, precision production and other scenes with strict requirements for power supply reliability, 

dual power supply redundancy has become a standard configuration. However, many people tend to ignore that the switching link between the two 

power sources is the key to determine whether the power supply can be truly uninterrupted. If the switching device has slow response and poor 

reliability, even if two power supplies are configured, there is still the risk of power failure. STS static transfer switch is the core component specially 

designed to solve this problem, and it is also an indispensable part of professional dual power supply system.

Traditional dual power supply switching relies on mechanical devices such as contactors and circuit breakers, and power supply switching is realized 

by opening and closing contacts. This kind of device has inherent action delay, and the switching time is generally tens of milliseconds to hundreds 

of milliseconds. For sensitive loads such as servers, precision instruments and automated production lines, short-term power supply interruption may 

lead to equipment restart, data loss and production interruption. At the same time, the repeated opening and closing of mechanical contacts is prone 

to arc and wear, which not only has a 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, and it is also unable to respond to power quality problems such as voltage sag, overvoltage and undervoltage 

in time.

STS static transfer switch adopts semiconductor contactless switching architecture, with no mechanical action in the whole process, which can smoothly 

switch the main and standby power supplies in milliseconds, and industrial models can generally switch within 5 milliseconds, with almost no perception 

at the load end in the whole process, thus realizing seamless power supply redundancy. In addition to power-off switching, STS can also monitor the 

voltage, frequency and other key parameters of the two power supplies in real time. In case of abnormal power quality such as overvoltage, undervoltage 

and voltage sag, STS will automatically switch to the normal one-way power supply to actively protect the back-end load from the impact of bad power. 

Thanks to the contactless design, STS has no mechanical wear problem, longer service life and lower maintenance cost, which is very suitable for 

long-term uninterrupted operation in industrial scenes.

For standard rack deployment scenarios such as computer rooms and base stations, the adaptability advantage of rack STS is particularly prominent. 

Baoweite's full range of rack-mounted STS static transfer switch adopts standard 19-inch rack structure, which can be directly installed in the server 

cabinet without occupying extra floor space, with regular internal wiring and high integration with the cabinet power distribution system. The products 

cover single-phase and three-phase multi-power segments, support 4P three-phase four-wire system, and the zero line is switched synchronously, which 

is suitable for various industrial and communication loads. Multiple protection mechanisms such as input overvoltage, output overcurrent, short circuit 

and overheating are standard to ensure the safety of power supply in all directions; Optional SNMP communication and dry contact alarm functions, 

which can be connected to the centralized monitoring system of the computer room, facilitate the remote management of operation and maintenance 

personnel, and greatly improve the operation and maintenance efficiency of the distribution system.

Nowadays, STS static transfer switch has been widely used in data centers, communication base stations, industrial automation production lines, medical 

precision equipment, core load of commercial buildings and other scenes, and STS can be seen in any dual power supply system with high requirements 

for power supply continuity. It is like the "safety gate" of the power supply system, monitoring the state of the power grid at all times, completing the 

switching at the moment of abnormal occurrence, and escorting the continuous and stable power supply of the load.

When selecting the type, the corresponding rated capacity should be selected according to the load power, and it is suggested to reserve an appropriate 

margin 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 on-off of the zero line; The installation environment is the standard computer 

room, and the rack type is preferred, which saves space and is easy to manage; In key scenarios, industrial products with complete protection functions 

and support for communication monitoring are preferred, giving consideration to reliability and convenience of operation and maintenance.

Generally speaking, STS static transfer switch is the core hub of dual-power redundant system, and the switching speed and reliability directly determine 

the uninterrupted capacity of the whole power supply system. Baoweite has been deeply involved in the field of industrial power supply. With millisecond 

seamless switching, industrial-grade stable quality and perfect protection and monitoring functions, its rack STS static transfer switch has been widely 

used in various industrial and communication scenarios to create a highly reliable dual-power supply system for customers.

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.