General
The indoor KYN28A-12 AC metal switchgear is a 3.3-12kV 3-phase AC 50/60Hz single-bus or single-bus segment distribution system for power plants, substations, industry and power. Widely used in the system. Mining companies and urban construction are used for management, protection and surveillance. The switchgear is equipped with a domestic ZN63A (VS1) vacuum circuit breaker, which has a strong circuit breaker capacity, a long mechanical life, low maintenance cost, and a long overhaul period. It can also be equipped with imported brand circuit breakers such as the Schneider HVX and ABBVD4. It can also be equipped with appliances such as JCZR16, VCF, VC, 3TL and other contactor and fuse combinations.
Service environment
1. Air temperature: -25℃~+40℃
2. Humidity: Monthly humidity 95%; Daily humidity 90%.
3. Altitude2500m
4. Ambient air not apparently polluted by corrosive and flammable gas, vapor, etc.
5. No frequent violent shake
Features
1. Safe and reliable: the cabinet structure is made of aluminum-zinc-coated sheets and assembled by multiple bendings. It is fully armored and fully enclosed. The compartments in the cabinet are independent compartments separated from each other; perfect "five-proof" interlocking function, Reliably prevent misoperation and erroneous entry into the live interval; fast closing grounding switch to achieve reliable protective grounding.
2. Flexible solutions: The switch cabinet has a complete range of solutions, which can flexibly form various system solutions to meet customer requirements; according to the application environment and special requirements, it can also provide high-altitude series products, double bus series and various non-standard solutions.
3. Strong practicability: The cabinet shell has high sealing strength to prevent the equipment from being invaded by debris and insect pests. The protection level is IP4X; the same model of handcart has good interchangeability; the secondary line is laid in the trunking and is well protected , And easy to overhaul; installation, debugging and maintenance from the front, can be back to back to form a double arrangement or installed against the wall, reducing the footprint; the use of general accessories and standard spare parts, low maintenance costs.
Technical data
| No. | Item | Unit | Parameter |
| 1 | Rating voltage | kV | 3.6~24 |
| 2 | Rating frequency | Hz | 50/60 |
| 3 | Rating current | A | 630,1250,1600,2000,2500,3150,4000 |
| 4 | Branch busbar Rated current | | 630,1250,1600,2000,2500,3150,4000 |
| 5 | Main busbar Rated current | | 630,1250,1600,2000,2500,3150,4000 |
| 6 | 1min Power frequency withstand voltage | wet | KV | 38 | 50/60 |
| | | dry | | 48 | 60/65 |
| 7 | Lightning impulse withstand voltage | kV | 75 | 95/125 |
| 8 | Rated short circuit breaking current (peak) | KA | 40/50/63/80/100 |
| 9 | Short time withstand current(4s) | | 20/25/31.5/40 |
| 10 | Protection type | | IP4X for housing |
