CHH Power’s package substation is an integrated, compact power distribution solution—prefabricated in the factory to combine high-voltage switchgear, distribution transformers, and low-voltage power distribution devices per customized wiring schemes. Ideal for mines, factories, enterprises, oil and gas fields, and wind power stations, it delivers reliable performance in both indoor and outdoor settings. To ensure optimal compatibility, safety, and efficiency, CHH Power recommends the following systematic selection framework.
Align the substation’s high-voltage incoming voltage with two critical factors: the project’s power load importance (e.g., critical vs. general loads) and the on-site high-voltage power supply specifications. CHH Power’s technical team provides tailored voltage matching consultations to avoid grid mismatches.
Determine the system’s short-circuit current using grid parameters such as short-circuit capacity and line impedance. This data directly guides the selection of power supply components (e.g., circuit breakers, fuses) to ensure they can withstand fault currents—CHH Power’s components are rigorously tested to meet global short-circuit withstand standards.
Perform accurate load calculations for all connected equipment, then select a transformer capacity with a reasonable margin (typically 10–20%) to accommodate future load growth. CHH Power offers a full range of capacity options, from small to large, to match diverse project needs.
Choose the transformer type from CHH Power’s product portfolio to suit user-specific conditions and environmental constraints:
- General oil-immersed transformers: Cost-effective for outdoor, well-ventilated areas with no strict fire safety requirements.
- Sealed oil-immersed transformers: Low maintenance, suitable for harsh outdoor environments (dust, humidity).
- Dry-type transformers (e.g., CHH’s SC/SCB series): Fireproof, explosion-proof, ideal for indoor settings (high-rise buildings, dense industrial areas) or locations with strict environmental regulations.
Based on the number and type of low-voltage loads, select the appropriate number of outlet circuits. CHH Power recommends reserving 15–20% backup circuits to support future load expansion.
Match the capacity of low-voltage circuit breakers to the rated current of each circuit, ensuring reliable overload and short-circuit protection. CHH’s low-voltage components are engineered for seamless integration with its package substations.
Prioritize locations close to the load center to minimize incoming/outgoing cable length (reducing line loss and installation costs). Ensure easy access for wiring, routine maintenance, and emergency responses, while avoiding negative impacts on the surrounding environment (e.g., noise-sensitive areas).
Implement flood protection based on the installation site’s environmental conditions—e.g., elevating the substation foundation above the local flood level, installing waterproof enclosures, or selecting CHH’s IP65-rated waterproof package substations for wet areas.
Properly install a reliable grounding device to meet safety standards, preventing electric shock hazards and ensuring stable operation of protection systems. CHH Power provides detailed grounding design guidelines for each substation model.
Ensure the installation foundation (size, load-bearing capacity, material) meets the technical requirements of the selected CHH package substation. All prefabricated components are designed for easy on-site assembly, reducing installation time and errors.
CHH Power’s technical experts offer end-to-end support throughout the selection process—from load analysis and parameter calculation to site assessment and customization. Our package substations are manufactured under strict quality control, ensuring compliance with IEC, GB, and other international standards.
