This series of products are designed according to the distribution network standardized construction work of State Grid Corporation of China, and the technical requirements of "standard Design and Customization Scheme of 12KV Handcart Switchgear". With higher electrical performance and higher safety performance;
The standard design of common interchangeability and civil interface of the equipment improves the convenience of operation and maintenance of the switchgear.
This series of products are applicable to the indoor three-phase 50Hz rated voltage 12kV and below power system, mainly used in the state Grid Corporation of China's residential distribution projects, but also can be applied to power plants, substation, industrial and mining enterprises and high-rise buildings, as to accept and electric power distribution and the implementation of circuit control protection and measurement functions.
The switchgear has various locking functions to prevent misoperation, “five prevention” function. The switchgear is a power distribution equipment with advanced technology, stable performance, reasonable structure, convenient and safe operation.
GB1984 AC high voltage circuit breaker
Technical conditions for ordering DL/T404 indoor AC high voltage switchgear
“Standardized Design and Customization Scheme of 12KV Handcart Switchgear”
| Serial number | Project | Unit | Parameter | ||
| 1 | Rated voltage | kV | 12 | ||
| 2 | Rated frequency | Hz | 50 | ||
| 3 | 1min Power frequency withstand voltage （effective value） | kV | Phase to phase | 42 | |
| Between open contacts | 48 | ||||
| Lightning impulse withstand voltage（peak value） | kV | Phase to phase | 75 | ||
| Between open contacts | 85 | ||||
| 4 | Rated current | A | 630 | 1250 | 1250 |
| 5 | Rated short-circuit making current | kA | 20 | 25 | 31.5 |
| 6 | Rated short circuit closing current (peak value) | kA | 50 | 63 | 80 |
| 7 | Rated short-time withstand current (thermal stable current 4S) | kA | 20 | 25 | 31.5 |
| 8 | Rated peak tolerance current (dynamic stable current) | kA | 50 | 63 | 80 |
| 9 | Rated voltage of auxiliary control loop | V | DC or AC:110/220 | ||
| 10 | Protection grade | IP41(Open the door between compartments is IP2X) | |||
| 11 | Dimensions (width × depth × height) | mm | 800×1500×2300 | ||
| 12 | Weight | Kg | |||
