SH Power possesses a well-established R&D and engineering team capable of tailoring exclusive solutions for various project requirements. From system design to on-site application, we provide comprehensive technical support, helping customers achieve safe, intelligent, and highly efficient power distribution systems.
A box-type substation, also known as a prefabricated substation, is a factory-built assembly that integrates high-voltage switchgear, power transformer, low-voltage switchgear, energy-metering equipment, reactive-power compensation devices, auxiliary equipment and interconnections inside a single metallic or non-metallic enclosure. It offers small footprint, minimal land use, the possibility of siting close to the load center, easy transport, simple installation and short energization time. These features make it especially suitable for public building complexes, residential quarters, scenic tourist spots and urban roadways where loads are small and geographically dispersed.
| Item | High-voltage apparatus | Transformer | Low-voltage apparatus | |
| Rated voltage | 7.2,12 | 6/0.4,10/0.4 | 0.42 | |
| Rated power (capacity) | single-row:200-1250 | |||
| three-column:50-400 | ||||
| Rated current | 200-630 | 100-300 | ||
| Rated breaking current | Load switch 400-630A | 15-63 | ||
| For switch-fuse combinations, value depends on fuse | ||||
| Rated short-time withstand current | 20*(2) | 200-400KVA | 15*1 | |
| 12.5*(4) | 400KVA | 30*1 | ||
| Rated peak withstand current | 31.5,50 | 200-400KVA | 30 | |
| 400KVA | 63 | |||
| Rated making current (peak) | 31.5,50 | |||
| Power-frequency withstand voltage | Relative to ground and phase-to-phase 32, 40 | Oil-immersed:35/5min | ≤2 kV at 300 V | |
| Across isolating distance 34, 48 | Dry-type:28/5min | 2.5 kV at 300/600 V | ||
| Lightning impulse withstand voltage | Relative to ground and phase-to-phase 60,75 | 75 | ||
| Across isolating distance 75,85 | 75 | |||
| Noise level | Oil-immersed:＜55 | |||
| Dry-type:＜65 | ||||
| Degree of protection | IP44 | |||
| Overall dimensions | Overall dimensions vary with selected transformer capacity and type | |||
Application environmental conditions
Our switchgear, including C-GIS and ring main units, features a compact and modular design, saving valuable installation space and allowing for flexible expansion and easy on-site assembly.
With all high-voltage components sealed in a stainless-steel gas tank, our equipment is protected from environmental factors. It features reliable mechanical and electrical interlocks to ensure the safety of operators.
Committed to sustainability, we offer eco-friendly switchgear that uses dry air as the insulating medium, completely eliminating SF₆ gas and minimizing environmental impact.
The fully sealed and insulated design ensures our switchgear is virtually maintenance-free throughout its service life, significantly reducing operational costs and downtime.
Our products can be integrated with intelligent solutions, supporting remote monitoring, control, and automated distribution systems, which is crucial for building modern smart grids.
Ideal for secondary distribution substations, industrial parks, commercial buildings, and residential communities, providing reliable power control and protection.
Perfectly suited for renewable energy applications such as wind farms and solar power plants, where compact and reliable switchgear is essential for power collection and grid connection.
Deployed in critical infrastructure like subways, railways, airports, and tunnels, where space is limited and high reliability is non-negotiable.
Used in demanding environments such as mining, petrochemical plants, and data centers that require robust, safe, and uninterrupted power management.
