(Client name and exact site have been anonymized for confidentiality.)
Project Background
In an electromagnetic control upgrade at a data center in East China, the protected loads in the server room could not be interrupted by a mains changeover. The project required a static transfer switch (STS) distribution panel inside the room distribution area to switch between two power sources, plus an outdoor floor-standing distribution box for the site-side supply point.
Four requirements were set: the transfer device must switch between the two sources automatically or manually while keeping the load supplied; the enclosure must mount directly on the existing distribution room wall without civil work; panel status must be readable from outside the door so routine inspection does not require opening it; and the outdoor unit must be rain and dust protected with warning labels that non-specialist staff can understand.
Customer Challenges
- Server room loads are extremely sensitive – a slow transfer can trigger a server restart
- The upgrade schedule was tight, so the enclosure had to fit the existing wall and existing circuits without on-site re-drilling
- Inspection required knowing which source is feeding the load without opening the door
- The outdoor unit is exposed to weather year-round, so enclosure protection and warning labels are both essential
Xiaoyang Solution
- STS dual-source transfer: model STS, rated voltage AC 380V, rated current 100A, two inputs I1 / I2 and a single OUTPUT, with a green power-flow diagram, two source status indicators and a manual transfer selector on the panel
- Visible from outside: the door has a transparent viewing window, so inspection staff can read panel status and the active source without opening the door
- Wall mounting: the wall-mounted enclosure is fixed directly to the distribution room wall, saving floor space and avoiding civil work
- Marking and warnings: the metal nameplate records model, rated voltage, rated current, production date and serial number; bilingual warning labels read “Warning / WARNING”, “Do not touch” and “Danger, live voltage”
Delivery and On-site
The same project also delivered an outdoor floor-standing distribution box (3-JY outdoor distribution box): a sloped rain hood with ventilation slots underneath, the enclosure seated on a concrete base, and the name label plus the yellow bilingual warning label applied before dispatch – no secondary labelling was needed on site.
Related Products
- Products – PLC control cabinets, LV distribution boxes, outdoor waterproof enclosures, data center power & environment monitoring cabinets
- Contact – STS transfer panels and data center backup power packages
For data center backup power or STS transfer panel requirements, contact our engineers: sales@qdxiaoyang.com