1000 kVA Compact Substation (Compact Substation), commonly known as "box-type substation" or "prefabricated substation", is a complete set of factory prefabricated power distribution equipment. It integrates high-voltage switchgear, 1000 kVA distribution transformers and low-voltage distribution devices in one or more sturdy metal boxes according to a predetermined electrical wiring scheme.
Unlike traditional substations that require a large amount of civil construction on site, compact substations achieve "plug and play". It integrates various functions such as transformer, power distribution, metering, protection and compensation. It is a brand-new transformer and distribution device that has emerged after civil substations, especially suitable for urban network construction and transformation.
Core advantages of the new 1000 kVA compact substation
1. Ultimate space saving
This is the most distinctive feature of compact substations. By arranging or tightly arranging the high-voltage chambers, transformer chambers, and low-voltage chambers in multiple layers, their area is usually only 1/10 to 1/5 of that of traditional civil substations. For urban centers, commercial complexes or underground power distribution houses with every inch of land and every inch of gold, this greatly reduces the occupation of land resources.
2. Factory prefabricated, rapid deployment
All equipment is assembled, wired and debugged in the factory, and only foundation pouring and external cable connection are required on site. This model shortens the on-site construction cycle from several months to several days, and is especially suitable for real estate development, municipal engineering and temporary construction electricity projects with tight construction periods.
3. High safety and reliability
Fully enclosed structure: The "five-proof" interlocking mechanism is adopted to effectively prevent vicious misoperation accidents such as pulling the isolation switch with load and straying into the live interval.
Environmental isolation: High-pressure and low-pressure equipment are sealed in metal boxes, which are not disturbed by external dust, moisture, and small animals (such as rats and snakes), and have high operating reliability.
Oil-free design: dry-type transformers or fully sealed mineral oil transformers are usually used, which fundamentally eliminates the hidden dangers of fire and oil leakage and meets fire protection specifications.
4. Low operating and maintenance costs
Due to the use of maintenance-free or less maintenance-free advanced equipment (such as oil-free switches, dry transformers), and the box itself has good anti-corrosion and anti-rust capabilities, the substation can be in good condition for maintenance, greatly reducing the workload and cost of daily inspections and maintenance.
5. Flexible combination
The capacity configuration of 1000 kVA makes it widely applicable. The high-voltage and low-voltage schemes inside the box transformer can be flexibly adjusted according to user needs, such as the number of incoming and outgoing loops, whether it is equipped with reactive power compensation and intelligent monitoring modules, etc., and are highly versatile and interchangeable.
Main application scenarios
The capacity level of 1000 kVA makes it very suitable as a power supply core for medium-sized loads and is widely used in the following scenarios:
Urban distribution networks and public buildings
Urban residential areas, high-rise buildings, schools, hospitals, and public distribution houses in bustling urban areas.
Industrial and energy fields:
On-site boost or buck stations for small and medium-sized factories, mines, oil and gas fields, wind farms and photovoltaic power plants.
Business and infrastructure
Power supply for urban commercial complexes, railway stations, ports, airports, municipal street lights and green belts.
Temporary construction electricity
Temporary power distribution centers on construction sites and infrastructure construction sites, which can be moved to the next construction site for reuse after the project is over.
Product parameters
| Project | Unit | Parameter | ||
| High pressure side |
Rated frequency | Hz | 50 | |
| Rated voltage | KV | 6/10/35 | ||
| 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 pressure side |
Rated voltage | V | 220/380/690/800 | |
| Main circuit rated current | A | 50-4000 | ||
| Branch current | A | 5-800 | ||
| case | Protection level | IP23/IP33/IP65 | ||
| Noise level(dB) | ≤50 | |||
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