Prefab cabins (primary/secondary equipment cabins, energy storage cabins, SVG cabins, box substation cabins) are metal enclosures housing electrical equipment outdoors. In summer, internal temperatures can exceed 60°C, causing circuit breakers, VFDs, batteries and SVG modules to trip or age prematurely.
Haocheng HCK cabinet air conditioners use closed-loop compression cooling. The internal loop does not introduce external dust or moisture. With IP55 dust/water-jet protection and -40~+55°C wide-temperature operation, they can be wall-mounted or embedded on prefab cabin sidewalls to provide 7×24 precision temperature control.
GIS, circuit breaker and isolator cabins with concentrated heat loads require high-power cooling.
Protection, measurement, control and communication cabins demand stable temperature, humidity and cleanliness.
SVG power modules for reactive power compensation generate large heat and need rapid heat exchange and even airflow.
Battery container thermal management keeps cells in the 20~30°C optimal range and extends cycle life.
Dust-tight and protected against water jets, suitable for outdoor dust, rain and oily environments.
Reliable start-up in severe cold and extreme heat.
Internal circulation does not draw in outside air, protecting sensitive electrical components.
Supports remote monitoring and centralized O&M with real-time cabin temperature data.
Wall-mounted, embedded or top-mounted options to match different cabin structures.
Cooling capacity, power supply, dimensions and interfaces can be tailored to the cabin.
| Cabin Type | Cabin Volume | Typical Heat Load | Recommended Model | Mounting |
|---|---|---|---|---|
| Small secondary cabin | ≤8 m³ | 1.5–2.5 kW | HCK-3K00022L / HCK-3K50022L | Wall / embedded |
| Medium primary cabin | 8–20 m³ | 2.5–4 kW | HCK-5K00022L | Wall / top |
| Large energy/SVG cabin | 20–40 m³ | 4–7 kW | HCK-7K50022L or multiple units | Wall / top |
| Extra-large custom cabin | >40 m³ | >7 kW | Custom solution / multiple control | Custom design |
Prefab cabin ACs are industrial cabinet air conditioners designed for IP55 protection, closed-loop cooling, wide-temperature operation and long-term reliability. Common split/room ACs cannot survive outdoor dust, rain and wide temperature ranges.
Calculate Q_total = Q_equipment + Q_solar + Q_conduction + Q_convection. Rule of thumb: small cabin 3000W, medium cabin 5000W, large energy/SVG cabin 7500W or multiple units in parallel, with a 20% safety margin.
Common methods are wall-mounted side installation (cutout in cabin wall) or embedded door installation. Top-mounted units suit top-ventilation structures. Mounting plate, gasket and manual are included.
Lithium cells perform best around 20~30°C. Higher temperatures accelerate aging; lower temperatures reduce charge/discharge efficiency. HCK cabinet ACs stabilize the cabin within the set range and extend battery life.