The KYN28A-12 central switchgear is a power distribution device for 3-10KV, 50HZ single busbar and single busbar segmented systems.
The KYN28A-12 central switchgear is a power distribution device for 3-10KV, 50HZ single busbar and single busbar segmented systems. It is used in power plants, small and medium-sized generator power transmission, secondary substations of power systems, and substations in industrial and mining enterprises for power receiving, power transmission, starting, control, monitoring, and protection of large high-voltage motors.
1.IEC 62271-200:2021 High-voltage switchgear and controlgear - AC metal-enclosed switchgear and controlgear with rated voltage above 1kV and below 52kV
2.GB 3906-2020 3.6kV~40.5kV AC metal-enclosed switchgear and controlgear
1. Ambient air temperature: Upper limit +40℃, lower limit -10℃, maximum daily temperature difference: 25K.
2. Altitude: Not exceeding 1000m. For locations exceeding 1000m altitude, comply with JB/Z102 "Technical Requirements for High-Voltage Electrical Appliances Used in High-Altitude Areas".
3. Ambient relative humidity: Daily average not exceeding 95%, monthly average not exceeding 90%.
4. Seismic intensity not exceeding 8 degrees, horizontal acceleration 0.25g, vertical acceleration 0.15g, safety factor greater than 1.67.
5. Maximum wind speed: 25m/s.
6. Icing thickness: 5mm (when wind speed not exceeding 15m/s).
7. Installation location: Indoor.
8. Ambient air should not be significantly polluted by corrosive or flammable gases, water vapor, etc.
9. Pollution level: Class III.
The KYN28A-12 centrally-mounted switchgear consists of two parts: the cabinet and the centrally-mounted withdrawable unit (handcart). The cabinet is internally divided into four compartments: circuit breaker compartment, busbar compartment, cable compartment, and relay/instrument compartment.
| Rated voltage (kV) | 10 |
| Maximum operating voltage (kV) | 12 |
| Power frequency withstand voltage (kV) | 42(1min) |
| Impulse withstand voltage (kV) | 75 |
| Rated frequency (Hz) | 50 |
| Rated current (A) | 630～4000 |
| Rated thermal stability current (kA 4S) | 20.25.31.5.40 |
| Rated dynamic stability current (kA) | 50.63.80.100 |
| Rated short-circuit breaking current (kA) | 20.25.31.5.40 |
| Rated short-circuit making current (kA) | 50.63.80.100 |
| Rated voltage (V) for opening/closing circuits and auxiliary circuits | DC110,220,AC110,220 |
| Protection level | IP4X |
1. All goods are packaged using national or professional standard protective measures to ensure they are suitable for long-distance transportation, moisture-proof, shockproof, rust-proof, and arrive at the site safely and undamaged.
2. The contract number, project number, drawing number, equipment name, model, specifications, origin station, destination station, and consignee are clearly marked on both sides (largest side) of the packaging box.
3. The lifting points of the packaging box are clearly marked.
4. The largest packaging box dimensions are 1400mm wide, 2000mm deep, and 2800mm high.
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