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Combined substation (hereinafter referred to as American box-type substation) puts the transformer body, high-voltage load switch, protection fuse and other equipment in the same sealed oil tank, so it is smaller in size. American box-type substation can be used both outdoors and indoors , widely used in industrial parks, residential areas, commercial centers, high-rise buildings and other places.
| serial number | project | unit | Technical Parameters |
|---|---|---|---|
| 1 | Rated voltage | kV | 3.6, 7.2, 12 |
| 2 | Short-term T frequency withstand voltage 1min | kV | 42 |
| 3 | Rated insulation level lightning impulse withstand voltage | kV | 75 |
| 4 | Rated frequency | Hz | 50 |
| 5 | Busbar rated current | A |
630, 1250, 1600, 2000 2500, 3150, 4000 |
| 6 | Rated short-time withstand current (4S) | k | 20, 25, 31.5, 40, 50 |
| 7 | Rated peak withstand voltage | k | 50, 63, 80, 100, 125 |
| 8 | Rated short circuit making current | k | 50, 63, 80, 100, 125 |
| 9 | Protection level | Shell IP4X (between compartments, IP2X when the circuit breaker door is open) | |
| serial number | model | Rated voltage (V) | Rated current (A) | Rated short circuit breaking current (KA) | Rated short-time withstand current (KA/1s) | Rated peak withstand current (KA) |
|---|---|---|---|---|---|---|
| 1 | GGD1 | 380 |
A:1000 B:600(630) C:400 |
15 | 15 | 30 |
| 2 | GGD2 | 380 |
A:1500(1600) B:1000 C:600 |
30 | 30 | 63 |
| 3 | GGD3 | 380 |
A:3150 B:2500 C:2000 |
50 | 50 | 105 |
| 4 | GGD4 | 380 |
A:4000 B:3150 C:2500 |
80 | 80 | 176 |
| serial number | project | unit | data |
|---|---|---|---|
| 1 | Main circuit rated voltage | V | Communication 380 (400), 660 (690) |
| 2 | Auxiliary circuit rated voltage | V | AC 220, 380 (400); DC 110, 220 |
| 3 | Rated frequency | Hz | 50 (60) |
| 4 | Rated insulation voltage | V | 660(1000) |
| 5 | Rated current: horizontal bus | A | ≤4000 |
| 6 | Rated current: vertical busbar (MCC) | A | 1000 |
| 7 | Busbar rated short-time withstand current (1s) | KA | 50, 80 |
| 8 | Busbar rated peak withstand current (0.1s) | V | 105, 176 |
| 9 | Power frequency test voltage (1min): main circuit | V | 2500 |
| 10 | Power frequency test voltage (1min): auxiliary circuit | V | 1760 |
| 11 | Busbar: three-phase four-wire system | A, B, C, PE, N | |
| 12 | Three-phase five-wire system | A, B, C, PE, N | |
| 13 | Protection level | IP40 |
