Compact Substation
ZELECT：Your Professional Compact Substation manufacturer!
Baoding Zhongyi Electric Corporation. Here in short referred to as "ZELECT", located in Baoding city, Hebei province, China. Founded in 2008, our company is one of the "high-tech enterprises", which produce and sell power transformer, high and low voltage switch-gear and prefabricated substations.
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Your inquiry will be replied within 24 hours.We also provide customized service and the perfect power solution to meet your requirements.
advanced equipment
We have many very advanced and complete production equipment to ensure the excellent quality of our products
professional team
There are currently 260 employees, including 18 technicians who have been engaged in the research and development of transformer products for many years, and 8 high-quality corporate managers.
global shipping
Our sales network is divided to five main regions: America, Southeast Asia, West&South Asia, Europe&Africa, Russian Market.
Compact substation, also known as prefabricated substation, is a kind of indoor and outdoor compact distribution equipment. It combines the high voltage switch equipment, distribution transformers and low voltage power distribution equipment together in a certain wiring schemes, installed in a steel structure which is moisture, rust, dust, rat, fire prevention, guard against theft, thermal insulation, fully enclosed and movable. It is suitable for mines, factories, oil and gas fields and wind power stations. It replaces the original civil distribution house and power station and becomes a new complete set of transformer and distribution equipment.
What are Advantages of Compact Substation
Reduced Overall Costs
Compared to a conventional substation, these units are pre-assembled, which helps in minimizing costs. So, there is a reduction in the transportation cost of multiple parts and field wiring as well as on-site testing. They are specially engineered in such a way that they speed up the installation process and reduce significant construction time. Moreover, they also cut down the testing process at the site, which is cost-saving and time-saving.
A Minor Footprint
Compact substations are engineered in a way that they use very little space. And even fitting them in different configurations is not as challenging as conventional substations. Transporting them to the desired location is easy and there is no need for additional electrical clearances thanks to the covered equipment.
Eliminated Environmental Hazards
There is a need for digging the ground for conventional substation that impacts the natural drainage, but it is not the case with a compact substation. As a tamper-proof metal container is used to contain the unit, it helps eradicate several environmental threats such as exposed grounding conductors and fencing.
Moreover, the container also helps in preventing oil spills that can cause ground contamination.
Convenience and Safety
With a compact substation, there are no issues with the relocation of equipment, nor is there a need to destroy or reconstruct a traditional station. This unit is compactly built and its mobility provides utmost convenience. And last but not least, it has safety features such as covered ground conductor, fully contained equipment, built-in oil containment, covered grounded conductors, and very little exposed parts. Overall, it provides a hazard-free environment for everyone around it.
Structure of Compact Substation
1. High-Voltage Switchgear
High-voltage cabinets can use SF6 gas insulation, environmental protection gas insulation, solid insulation ring network cabinets, and atmospheric sealed air insulation ring network cabinets. The direction of the pressure relief channel of the high-voltage cabinet should be towards the cable trench.
2. Transformer
It is recommended to use energy-saving and environmentally friendly, fully-sealed, oil-immersed transformers (silicon steel sheets / amorphous alloys) for the transformer form. The specific parameters should meet the requirements of GB 1094, GB/T 6451 and GB 20052.
Rated capacity 400kVA, 500kVA, 630kVA.
3. Low-voltage Power Distribution Device
If the automation terminal is configured, the internal space of the box-transformer should be sufficient to install the independent secondary cabinet of the DTU public unit.
A current and voltmeter should be installed on the low-voltage incoming line side.
When the capacity of the main bus-bar on the low voltage side is 400kVA, the rated current of the main bus-bar on the low voltage side is recommended to be 800A. When the capacity is 500kVA, the rated current of the main bus-bar on the low-voltage side is recommended to be 1000A. When the capacity is 630kVA, the rated current of the main bus-bar on the low-voltage side is recommended to be 1250A.
Compact Substation Specification
| Description | Unit | Data | |
| HV compartment | Rated Frequency | Hz | 50 |
| Rated voltage | kV | 6 10 35 | |
| Max operating voltage | kV | 6.9 11.5 40.5 | |
| Power frequency withstand voltage | kV | 32/36 42/48 95/118 | |
| (phase to ground and between phases)/ dis-connector fracture | |||
| lightning impulse withstand voltage | kV | 60/70 75/85 185/215 | |
| (phase to ground and between phases)/ dis-connector fracture | |||
| Rated current | A | 400 630 | |
| Rated short-time withstand current | kA | 12.5(2S) 16(2S) 20(2S) | |
| Rated peak withstand current | kA | 32.5 40 50 | |
| LV compartment | Rated voltage | V | 380 200 |
| Rated current of main circuit |
A |
100～3200 | |
| Rated short-time withstand current | kA | 15 30 50 | |
| Rated peak withstand current | kA | 30 63 110 | |
| Branch current | A | 10 ～ 800 | |
| Number of branch circuits | / | 1 ～ 12 | |
| Compensation capacity | kVA R | 0 ～ 360 | |
| Transformer | Rated capacity | kVA | 50～2000 |
| short-circuit impedance | % | 4 6 | |
| Tapping range | / | ±2×2.5% ±5% | |
| Connection group symbol | / | Yyn0 Dyn11 | |
Applications of Compact Substations
Compact substations find applications across a wide range of industries and settings:
Urban Areas:
In densely populated urban areas, space is limited. Compact substations are an excellent solution for providing reliable power distribution without taking up excessive space.
Commercial and Industrial Complexes:
These substations are commonly used in commercial and industrial settings, where a stable power supply is critical for operations.
Residential Developments:
Compact substations can be integrated into residential neighborhoods, ensuring a reliable power supply to homes without disrupting the local landscape.
Remote Locations:
In remote or isolated areas, where access to electricity infrastructure is challenging, compact substations can provide an efficient and self-contained solution.
Temporary Installations:
For temporary power requirements, such as construction sites or events, compact substations can be deployed quickly and easily.
Maintenance Tips for Compact Substation
1. Making sure the foundation is firm, the holes are blocked, and the cabinet has no moisture.
2. Whether the grounding device is complete and connected well. Whether the grounding resistance meets the requirements.
3. Is there any change of the outdoor environment. Does it affect the safety of traffic and pedestrians?
4. Check all feeder loads. Whether the three-phase load is balanced or over load phenomenon, whether the switch position and instrument indication are correct, whether the control device is working normally.
5. Dust removal inside the transformer room should be done once every other year. The surface of cabinet body of high pressure room and low pressure room and the surface of gas box can be wiped with wet cloth. In the transformer room, air blowing or vacuum cleaning is used for dust removal of transformers.
6. Daily maintenance and overhaul of the fan to check the operation of the fan. If the fan is not in operation, use the temperature and humidity controller, set it below the existing temperature, and start the fan inspection.
7. Maintenance and repair of high voltage switch and low voltage switch operating mechanism
(1) Check the barometer pointer. Is it in the green area? If it is in the red area, open and close the operation. Notify the manufacturer to deal with it immediately.
(2) For the lubrication of mechanical parts, separate and combine operation tests can be carried out after the completion of lubrication with universal lithium base grease (butter).
(3) Routine tests of cables and lightning arr-esters shall be conducted according to the requirements of routine tests. Conduct insulation test and leakage current test for cable and lightning arr-ester.
9. Terminal strip maintenance, terminal row may become loose due to heat expansion and cold contraction, annual inspection should be conducted to re-tighten all terminals in the terminal room. Note: Before refastening, please make sure that both the primary ac circuit and the secondary control circuit are powered off to avoid electric shock!
10. Notes for compact substation maintenance
(1) The door of the box is equipped with a windproof mechanism, which is to ensure that it is kept in a fully open state. When closing the door of the box, the root of the windproof mechanism must be lifted upward, and then the door cannot be yanked, so as to prevent the deformation of the mechanism or door and affect its normal use.
(2) After the local manual operation of the high-voltage load switch is completed, the load break switch operating handle should be placed back on the handle bracket inside the outer door. Lest it be lost.
(3) If the spare circuit of HV ring main unit is not connected with cables temporarily, the spare circuit should be closed before sending power, or the cable seat should be blocked with matching insulation cap to avoid accidents!
(4) The dust-proof cap equipped with the ring main unit can not replace the insulation cap.
(5) It is not allowed to use any short-circuit plug to insert the test hole during operation. Otherwise, the voltage sensor will be damaged.
(6) The low-voltage isolation switch can only be operated in the unlocked position. Don't force and drag!
Our Factory
Our factory covers an area of 33,300 square meters, with a total construction area of 6,100 square meters. There are currently 260 employees, including 18 technicians who have been engaged in the research and development of transformer products for many years, and 8 high-quality corporate managers. With the expansion of production scale and the increase of product varieties, it has now developed into a high-tech innovative enterprise that annual production capacity of more than 1000MVA, integrating the design, production and sales of open-type dry-type transformers, epoxy resin cast dry-type transformers, amorphous alloy transformers, and special transformers.
Our Certificate
Our company has passed the ISO9001-2008 international standard quality management system certification. All performance indicators of the products have reached the relevant national standards and international standards.
The oil immersed power transformers and dry-type transformers have passed the Test Report of the National Supervision and Inspection Center for Energy-saving Product Quality; Complete sets of low voltage switch-gear (GGD2) (GCK) has passed the test of China Compulsion Certification (CCC) from the State Bureau of Quality and Technical Supervision for Electrical Products; Indoor AC draw-out type metal clad switch-gear KYN28A-12 / 1250-31.5, fixed AC metal-enclosed Ring unit XGN15-12 / 1250-31.5 and XGN15 metal-enclosed switch-gears have passed the test of the National Quality Supervision and Inspection center for High-voltage Electrical Appliances Product.
FAQ
Q: How does a compact substation work?
Q: What are the advantages of compact transformer substation?
Q: What is the range of compact substation?
Q: What are the types of compact substation?
Q: Where is compact substation used?
Q: What is the difference between transformer and compact substation?
Q: What is compact substation?
Q: What is the test of compact substation?
Q: How many transformers in a substation?
Q: What are the factors affecting the substation?
Q: Why power transformers are used in substation?
Q: What is a feeder in a substation?
Q: How is voltage increased in a substation?
Q: How long do substation transformers last?
Q: Is a substation a transformer?
Q: Can a substation be removed?
Q: Do substations create power?
Q: What is the role of substation maintenance?
Q: Why is substation maintenance important?
Q: What is the control room in a substation?
We're known as one of the most professional compact substation manufacturers and suppliers in China. Please rest assured to buy high quality compact substation for sale here from our factory. Good service and competitive price are available.
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