Plug-and-Play Installation
Kechang's Pre-installed Box Substation comes fully assembled and pre-wired from our factory: all internal components, wiring, and controls are set up beforehand. You just deliver it to the site, position it, and connect the external cables-no complicated on-site assembly or debugging. We've kept the overall weight manageable and the structure compact, so it fits in urban green belts, industrial yards, or tight construction sites easily. This cuts installation time by 60% compared to traditional on-site built substations, saving you labor costs and getting your project up and running faster.
All-Weather Durability
Pre-installed substations sit outdoors most of the time, so they need to stand up to rain, dust, and temperature swings. Our box substation offers protection grades up to IP44-tight seals keep dust and moisture out, and the corrosion-resistant housing handles coastal or industrial air with ease. It runs steadily in temps from -25°C to 40°C, works at altitudes up to 2000 meters, and holds up in high-humidity areas. No more rust, no water damage to internal components, no failures from extreme weather. This substation is built to handle whatever the environment throws at it, so you don't have to worry about frequent repairs.
Low-Loss Energy Efficiency
Energy efficiency directly impacts long-term operating costs-something you can't overlook. Kechang's Pre-installed Box Substation uses high-purity copper windings and optimized core design, slashing both no-load and load losses significantly. It meets EU EcoDesign and DOE energy efficiency standards, so you'll see lower electricity bills month after month. The natural air cooling (AN) system works with targeted ventilation slots to keep heat down without wasting energy, and optional forced air cooling (AF) only kicks in when loads spike. This balance of performance and efficiency saves you money over the substation's 25-30 year lifespan.

Fire-Safe for Crowded Areas
If your substation is near residential areas, commercial buildings, or hospitals, fire safety is non-negotiable. Our pre-installed box substation is 100% oil-free-no leaks, no fire risks from spilled oil. Critical components use F1 grade flame-retardant epoxy resin, and the entire unit has passed IEC 60076 and UL fire safety tests. The sealed box design also contains any potential sparks, preventing fire spread. This solves your fire safety concerns in crowded or critical areas, helping you stay compliant with local codes and avoid costly safety incidents.
Hassle-Free Remote Monitoring
You don't have time to send teams to check substations on-site every day-remote monitoring is a game-changer. Our box substation comes with PT100 temperature sensors and smart thermostats that track internal temps, control fans, and alert you if temps get too high. It supports MODBUS/RS485 remote monitoring, so you can check operating status, view data, and even troubleshoot small issues from your office. No more unnecessary on-site visits, no missed warnings about potential faults. This keeps maintenance workload low and ensures you catch problems before they cause downtime.
Project-Tailored Configurations
Every substation project has unique needs-standard models always need modifications. Kechang lets you customize our pre-installed box substation to fit your specs: adjust voltage levels, pick a capacity from 50kVA to 2000kVA, upgrade the protection grade, tweak the box size, or choose between copper busbar and cable terminal wiring. We can also adjust fan layout or add extra thermostat features if you need them. All custom units still meet IEC 60076, CE, UL, and RoHS standards, and come with a 3-year warranty, complete quality inspection reports, and on-site support. We build it to your project's needs, so you don't have to compromise on performance or fit.

Product Specifications
| Project | Unit | Parameter | ||
| High | Rated frequency | Hz | 50 | |
| pressure | Rated voltage | KV | 6/10/35 | |
| side | Maximum operating voltage | KV | 6.9/11.5/40.5 | |
| Rated current | A | 400/630/1250 | ||
| Transfer current | A | 1200-3150 | ||
| Rated short-circuit switch current (current-limiting fuse) | KA | 25-50 | ||
| Transformer | Rated voltage | KV | 50 | |
| Rated capacity | KVA | 30-2000 | ||
| Tap range | % | ±2*2.5/±5% | ||
| Connection group | Yyn0/Dyn11 | |||
| Impedance voltage | % | 4.4/5.6/8 | ||
| Low | Rated voltage | V | 220/380/690/800 | |
| pressure | Main circuit rated current | A | 50-4000 | |
| side | Branch current | A | 5-800 | |
| case | Protection level | IP23/IP33/IP65 | ||
| Noise level(dB) | ≤50 | |||
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