Box-Type Substations (European Type)

Model Meaning

Normal Operating Environment

Altitude: ≤1000m; Environment temperature: -25°C ~ +40°C

Temperature: maximum monthly average temperature +30°C, maximum annual average temperature +20°C

Relative humidity: daily average ≤95%, monthly average ≤90%

Shockproof level: horizontal acceleration 0.4m/s², vertical acceleration 0.15m/s²

The installation site is free of dramatic impact, serious pollution, chemical corrosion, conducting dust and explosion hazards. In case of failure to meet the normal operating conditions, please negotiate with the Company.

Functions and Features

The substation consists of the high-voltage chamber, transformer chamber, and low-voltage chamber and may be arranged in the structure of the Chinese character "日" or "品."

With terminal, ring network or dual power supply mode

Adopt the power supply scheme of single or double transformers

Select oil-immersed power transformer or dry-type power transformer

• The box is provided with sufficient natural vents and heat insulation measures to ensure normal operation of all electrical equipment (forced cooling is allowed at the request of the user)
• Complete "five-prevention" functions, easy operation and maintenance, safe and reliable running
• The case material is stainless steel, aluminum alloy, cold-rolled sheet, color steel composite board, nonmetal or combination of two and is anti-aging, flame retardant, anti-corrosion, waterproof, dustproof and meets the long-term outdoor use conditions
• Small volume, light weight, and beautiful appearance in harmony with the environment
• When SF6 load switch cabinet is selected, the box-type substation has smaller size and is more suitable for community construction and street lamp transformation
• The high-voltage ring main unit may be assembled with the network automation terminal (RTU) to achieve reliable detection of the short circuit and single-phase ground fault and has the "four-remote" function for network automatic upgrading

Transformer

Prefabricated substations use low-loss, oil-immersed, fully sealed transformers, and dry-type transformers can also be selected. The transformers can enter and exit conveniently.

High Voltage Side

The high voltage of the prefabricated substation is generally protected by the composite apparatus of load switch and fuse. In case of a one-phase fuse blow, the three-phase linkage releases. The load switch may be of compressed-gas type, vacuum, sulfur hexafluoride, and other models and may be configured with an electric operating mechanism to achieve automatic upgrading; the fuse is a high-voltage fuse with an impactor, having reliable action and large switching capacity. The transformers of 800kVA and above may be protected by ZN12, ZN28, VS1 and other vacuum circuit breakers.

Low Voltage Side

The universal or intelligent circuit breaker is used for the master switch at the low voltage side, and the new model casc switch with small volume, short flashover and flexible outgoing line is used for the outgoing switch; the intelligent automatic tracking reactive power compensation device has contactor and contactless switching modes for choice.

Please provide the following accurate information when requesting a quotation or placing an order, so that we can perform technical calculations and schedule production accordingly:

Project Overview:​

Project name, installation site, and operating environment (e.g., altitude, maximum/minimum ambient temperatures, relative humidity, pollution level, presence of corrosive gases or severe vibration, etc.).

Product Model & Specifications:​

Specify the required model of the Pad-Mounted Transformer (or Prefabricated Substation).

Transformer Configuration:​

Transformer Type:​ Oil-immersed transformer / Dry-type transformer

Rated Capacity (kVA)​

Primary & Secondary Voltage Levels​ (e.g., 12kV / 0.4kV)

Rated Frequency​ (50Hz or 60Hz)

Winding Material:​ Copper windings or Aluminum windings

Appearance & Dimensions:​

Specify enclosure material (e.g., Aluzinc steel, stainless steel, non-metallic eco-friendly enclosure, etc.), color (provide color card number or RAL code), roof style (e.g., flat roof, sloped roof, glazed tile roof), and any overall dimensional constraints due to site limitations.

Protection Levels:​

Specify the IP (Ingress Protection) rating requirements for the High-Voltage compartment, Transformer compartment, and Low-Voltage compartment.

Key Technical Parameters & Configuration Requirements

High-Voltage Side Configuration:​

Specify the HV voltage level, incoming line method (cable/overhead), switchgear selection (e.g., load break switch, circuit breaker, RMU, etc.), protection configuration (e.g., fuses, relay protection devices), and metering mode (high-voltage metering/low-voltage metering).

Low-Voltage Side Configuration:​

Specify the LV voltage level and number of outgoing feeder circuits; brand, specifications, and parameters of main circuit breakers and branch circuit breakers; reactive power compensation capacity and switching method; requirements for smart monitoring meters and communication interfaces (e.g., RS485, Ethernet, Modbus protocol, etc.).

Temperature Control & Lighting:​

Configuration of forced-air cooling systems for the transformer compartment; automatic lighting and maintenance socket requirements for each compartment.

Special Functional Requirements:​

If anti-condensation devices, fire alarm systems, video surveillance systems, Remote Terminal Units (DTU/FTU), etc., are required, please specify in writing in advance.

Ordering Process & Important Notes

Technical Agreement Execution:​

For non-standard products or complex projects, both parties must sign a detailed Technical Agreement prior to production scheduling. This agreement shall serve as an annex to the contract and carry the same legal effect.

Drawing Confirmation:​

We will provide outline drawings, foundation drawings, and single-line diagrams based on your requirements. Please sign and confirm these drawings promptly. Any schedule delays resulting from late confirmation shall be borne by your side.

Change Management:​

After order confirmation and signed drawings, any technical or commercial changes must be submitted in writing and reconfirmed by both parties. Any cost increases or schedule delays arising from such changes shall be borne by the initiating party.

Site Coordination:​

Please ensure that on-site foundation construction strictly follows our foundation drawings and that adequate access is reserved for lifting and transportation. If you require our on-site installation guidance or commissioning services, please schedule in advance.

If you are looking for reliable power support for your project, please contact the Kima Electric team. We are ready to provide you with the best solutions.

◆ Convenient Inquiry Process

You may contact us through various channels, including our website and email. You can also download and fill out the "Inquiry Request Form" from our official website, or directly provide your existing technical documents and drawings as the basis for requirement assessment. We will provide a quotation as soon as possible.

◆ Production & Quality Control

•  Prior to formal production, we will provide detailed technical proposals including specifications and structural drawings for your review and confirmation.
•  We strictly implement the ISO quality management system, with comprehensive monitoring of raw materials, production processes, and finished product inspections to ensure stable and reliable quality for every customized product.

◆ Delivery & After-Sales Service

•  Packed in specialized wooden crates compliant with international standards, lined with high-performance moisture-proof materials to ensure absolute safety and dryness during long-distance transportation.
•  Detailed user manuals, maintenance manuals, and related documentation are provided with each shipment.
•  Remote or on-site installation guidance and commissioning services are available upon request.
•  Comprehensive after-sales support including technical consultation, troubleshooting, and spare parts supply to ensure long-term stable operation.