KYN28A-24 Ac Metal-enclosed Switchgear Equipment（Abbreviation as Switchgear）three-phase AC 50Hz, rated voltage of 24kV single busbar and indoor distribution equipment single bus system. Applicable to the power plant, substation and airports, docks, factories and enterprises, hotels, financial executives and civil construction indoor power supply system, as the acceptance and distribution of electric energy and power grid monitoring for protection. The switch cabinet to prevent misoperation preventing circuit breaker, load sliding trolley, prevent the charge grounding switch, grounding switch to prevent electrical transmission and prevent into live space in the ground position (five case) function, is a superior performance of power distribution equipment. The main switch cabinet uses the company’s ZN73 (VS1) -24 indoor high voltage vacuum circuit breaker, with long service life, high breaking capacity, frequent operation, safe and reliable operation etc.. Switchgear meets the requirements of GB3906 and DL/T 404. Through the mechanical industry high-voltage electrical products quality testing center all types of test.
| Project | Unit | Data | ||
| Rated voltage Ur | kV | 24 | ||
| Rated frequency fr | Hz | 50 | ||
| Main busbar rated current Ir | A | 630，1250，1600，2000，2500，3150 | ||
| 4s Rated short-time tolerant current Ik | kA | 25，31.5 | ||
| Rated short circuit breaking current Isc(valid value) | kA | 25，31.5 | ||
| Rated Peak-Peak tolerant current Ip | kA | 63，80 | ||
| Rated short-circuit current (peak) | kA | 63，80 | ||
| Rated insulation level | Ground、phase-phase | Isolated fracture | ||
| 1min Line Frequency Withstand Voltage Ud | kV | 65 | 79 | |
| Lightning impulse withstand voltage Up | kV | 125 | 145 | |
| Protection degree | Shell for IP4X every room and circuit breaker room door is open for IP2X | |||
