Preinstalled substation This series of preinstalled substation is a kind of outdoor whole set equipment which is prefabricated in the factory with high-voltage switchgear, distribution transformer and low-voltage distribution equipment according to the one-circuit scheme required by users. Each independent unit is equipped with perfect control, protection, live display and station lighting system. Automatic temperature and humidity control device and regulated ventilation system can be installed in the cabinet.
This series of preinstalled substation is suitable for 40.5kV power supply system, urban high-rise buildings, residential areas, industrial and mining enterprises, subways, docks, hotels, shopping malls, parks, stations, schools, hospitals, oil fields, airports, ports and power supply for temporary facilities, power grid connection for wind power generation systems, power supply for road lighting, etc.
1. Outdoor design, long service life.
2. Compact design, high practical efficiency.
3. Each compartment spacing board incoming and outgoing line sleeve prevent dust and moisture from entering each compartment.
4. The door, top cover and side plate are equipped with thermal insulating layer, with heat insulation function.
5. Assemble type structure, replacing every individual unit is very convenient.
6. It's very convenient to disassemble and install each component and part.
7. Can prevent condensation effectively.
8. The shell is made of recyclable materials and meets environmental requirements. 9. Multi-purpose design, in harmony with the environment.
| Classification | Project name | Unit | Main technical parameters | |||
| High voltage unit | Rated frequency | Hz | 50 | |||
| Rated voltage | kV | 7.2 | 12 | 40.5 | ||
| Main busbar rated current | A | 630 1250 1600 | ||||
| Rated short-time withstand current/time | kA/s | 20/4 25/3 31.5/4 | ||||
| Rated peak withstand current | kA | 50 63 80 | ||||
| 1min Power frequency withstand voltage(to ground/ fracture) | kV | 32/36 | 42/48 | 95/115 | ||
| Lightning impulse withstand voltage(to ground/ fracture) | kV | 60/70 | 75/85 | 185/215 | ||
| Rated short-circuit breaking current | kA | 20 25 31.5 | ||||
| Ground loop short-time withstand current/time | kA/s | 20/2 20/4 | ||||
| Main circuit rated short-circuit making current | kA | 50 63 80 | ||||
| Rated active load breaking current | A | 630 | ||||
| Rated closed loop breaking current | A | 630 | ||||
| Rated cable-charging breaking current | A | 10 | ||||
| Rated cut-off no-load transformer capacity | kVA | 1250 | ||||
| Rated transfer current | A | 1700 | ||||
| Mechanical life | Number of times | 3000 | 5000 | 10000 | ||
| Low voltage unit | Rated frequency | Hz | 50 | |||
| Rated voltage | kV | 0.4/0.23 | ||||
| Rated insulation voltage | V | 690 | ||||
| Main loop rated current | A | 100~3200 | ||||
| Rated short-time withstand current | kA/s | 30/1 50/1 100/1 | ||||
| Rated peak withstand current | kA | 63 105 176 | ||||
| 5s Power frequency withstand voltage | kV | 2.5 | ||||
| Lightning impulse withstand voltage(to ground/ fracture) | kV | June 8th | ||||
| Transformer unit | Type | Oil-immersed type | dry-type | |||
| Rated frequency | Hz | 50 | ||||
| Rated voltage | kV | 12(7.2)/0.4(0.23) | ||||
| Rated capacity | kVA | 30~1600 | ||||
| 1min Power frequency withstand voltage | kV | 35(25) | 28(20) | |||
| Lightning impulse withstand voltage | kV | 75(60) | ||||
| Impedance voltage | % | 4 6 | ||||
| Tapping range | ±x2.5% ±x5% | |||||
| Join groups | Y，yn0 D,yn11 | |||||
| Box body | High voltage and low voltage chamber protection grade | IP33D | ||||
| Transformer chamber protection grade | IP23D | |||||
| Sound level(oil-immersed type/ dry-type) | dB | ≤50/55 | ||||
| Secondary circuit withstand voltage level | kV | 1.5/2 | ||||
