Mini Substation

Mini Substation Overview

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Mini Substation Advantage

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> Leading technology



Mini Substation FAQ

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 Q1. What is MINI box type substation?

MINI box type substation is a compact prefabricated substation that integrates high-voltage switchgear, transformers, and low-voltage distribution equipment into a fully enclosed box. The transformer adopts an integrated oil tank design and is suitable for distribution systems with a voltage level of 11/0.4kV. Its characteristics are small size and modular design, suitable for space constrained scenarios.

 

Q2. What is the structural composition of MINI box type substation?

Usually divided into three parts:

*High voltage room: including ring main unit, load switch, fuse, etc;

*Transformer room: Oil immersed transformer with integrated oil tank design;

*Low voltage room: distribution cabinet and intelligent monitoring system. The layout is mostly in the shape of "mu" or "pin",.

 

Q3. What scenarios are MINI box type substations suitable for?

*Densely populated areas such as urban residential areas and commercial centers;

*Temporary power plant (construction site, activity area);

*Distributed energy (photovoltaic, wind power) access;

*Industrial parks and areas with scarce land resources.

 

Q4. What precautions should be taken when installing MINI box type substations?

*Basic requirements: A stable concrete platform needs to be poured, and cable channels should be reserved on the high and low pressure sides;

*Grounding resistance: The grounding grid resistance should be ≤ 4 Ω and regularly tested;

*Ventilation and heat dissipation: No debris should be piled up around to ensure natural air circulation.

 

Q5. What is the daily maintenance cycle for MINI box type substations?

*Minor repairs: 1-2 times a year, including dust removal, terminal tightening, and insulation testing;

*Overhaul: once every 5 years, involving equipment contact inspection and replacement of aging components;

*Special maintenance: Preventive testing is required if the product has been out of service for more than 3 months.

 

Q6. How to ensure safe operation of MINI box type substation?

*Fully enclosed design: dustproof, moisture-proof, rodent proof, and the box material is flame-retardant;

*Five prevention interlocking: prevent misoperation;

*Surge arrester configuration: Zinc oxide surge arresters are installed in the high-voltage room and replaced regularly.

 

Q7. What are the advantages of MINI box type substations compared to traditional substations?

*Floor area: only 1/10 of traditional stations;

*Construction period: shortened by more than 60% (about 1-2 weeks);

*Cost: Comprehensive investment reduced by 40% to 50%.

 

Q8. How to solve the heat dissipation problem of MINI box type substation?

*Natural ventilation: The box is equipped with louvers and ventilation holes;

*Forced cooling: Install a temperature controlled fan or top exhaust system;

*Thermal insulation material: The interlayer of the box is filled with fire-resistant insulation material.

 

Q9. Can MINI box type substations support intelligent management?

Supports the "four remote" functions (telemetry, remote signaling, remote control, remote adjustment), equipped with temperature and humidity monitoring, smoke alarm, and remote diagnostic system, and can be unmanned.

 

Q10. What is the capacity range of MINI box type substation?

*MINI Box Transformer: Conventional 100kva-2500kva, maximum capacity up to 3000kVA;

 

Q11. What is the protection level of MINI box type substation?

The box is made of aluminum zinc coated steel plate or alloy material, with a protection level usually ranging from IP23 to IP54, suitable for harsh outdoor environments.

 

Q12. How to deal with sudden tripping during the operation of MINI box type substation?

*Immediately check the status and load condition of the low-voltage circuit breaker;

*Power can only be transmitted after eliminating overload or short circuit faults;

*Record fault information and analyze the cause to avoid recurrence