This prefabricated substation uses channel steel for the base and angle steel for the cabinet frame. The enclosure features a unique honeycomb structure with a double-layer (composite panel) shell, providing robustness, thermal insulation, and good heat dissipation and ventilation. It is aesthetically pleasing and offers a high protection rating. The enclosure materials are available in stainless steel, aluminum-zinc alloy plate, aluminum alloy, cold-rolled steel plate, or color steel plate, with flame-retardant thermal insulation material filled in between. Various styles are available, such as ventilation type, villa type, compact type, etc.
◆ Altitude: 1000 meters and below.
◆ Ambient Temperature: -25°C to +40°C. The average temperature over a 24-hour period does not exceed +35°C.
◆ Wind Speed: Not exceeding 35 m/s.
◆ Relative Humidity: Does not exceed 90% (at +25°C).
◆ Seismic Acceleration: Horizontal acceleration not greater than 0.4 m/s², vertical acceleration not greater than 0.2 m/s².
◆ Location: Should be free from conductive dust and corrosive, flammable, or explosive substances harmful to metals and insulating materials.
◆ Installation Site: Should be free from severe vibration, with a vertical inclination not exceeding 3°.
Note: For special service conditions, please consult with our company when placing the order.
When placing an order, the customer must provide the following information:
◆ Main circuit diagram/scheme (including substation capacity, circuit breaker, disconnector, current transformer specifications, etc.).
◆ Any special environmental conditions of use should be stated at the time of order.
◆ A technical agreement signed by both parties serves as a supplementary document to the supply contract. All customer requirements should be stated in the order and the technical agreement.
◆ Any spare parts, consumables, or tools beyond the standard accessories should be specified by type and quantity and listed in the agreement.
| No. | Item | Unit | High-voltage electrical apparatus | Transformer | Low voltage electrical apparatus |
| 1 | Rated voltage Ue | KV | 7.2/12 | 6/0.4；10/0.4 | 0.4 |
| 2 | Rated capacity Se | KVA | Mesh font: 200-2500 | Maximum 2 * 1250 | |
| Product type: 50-800 | |||||
| 3 | Rated current Le | A | 200-630 | 144/3600 | 100-3000 |
| 4 | Rated breaking current | A | Load switch 400-630A | 15-63 | |
| KA | Combined electrical appliance Depending on the fuse Cutout | ||||
| 5 | Rated short-time withstand current (seconds) | KA | 20×(2) | 15×1 | |
| 12.5×(4) | 30×1 | ||||
| 6 | Rated peak withstands current | KA | 31.5；50 | 30 | |
| 63 | |||||
| 7 | Rated close current | KA | 31.5；50 | ||
| 8 | Power frequency withstand voltage of 1 min | KV | Phase to earth, phase to phase 30/42 | Oil immersed:35/5min | 2kv when below 300V |
| Isolating clearance 34/48 | Dry-type:28/5min | 2.5kv when between 300V and 600V | |||
| 9 | Lightning impulse | KV | Phase to earth, phase to phase 60/75 | 75 | |
| Isolating clearance 75/85 | |||||
| 10 | Sound level | KV | Oil immersed: Below 55 | ||
| Dry-type: below 65 | |||||
| 11 | Protection grade | dB | IP23D | ||
| 12 | Outline dimension | According to the plan and the selected high and low voltage switchgear and transformer, selecting the outline dimension of different size | |||
