KYN61-40.5 Armored withdrawable AC metal-enclosed switchgear
The KYN61-40.5 armored metal-enclosed switchgear (refered to as switchgear) is an improved version of our original product.
Overview
The KYN61-40.5 armored metal-enclosed switchgear (refered to as switchgear) is an improved version of our original product. t is suitable forthree-phase Ac 50Hz power sytems and is used to receive and distribute electrical energy, as well as to contro, protect, and monitor circuits.
This switchgear is equipped with various functions to prevent misoperation, including preventing the movement of the draw-out unit under load.preventing the closing of the grounding switch under power, and preventing unauthorized access to live compartments.The switchgear is equipped with high-performance ZN85, VN1 vacuum circuit breakers or ABB VD4, HD4 series vacuum circuit breakers.
The switchgear is a technologicaly advanced, stable-performing, reasonably structured, user-fiendly, and safe and relable distribution equipment.
Model Meaning

Terms of Use
▪ Ambient air temperature: Maximum temperature +40'C, minimum temperature -10℃;
▪ Altitude: ≤1000m;
▪ Ambient relative humidity: daily average ≤ 95%, monthly average ≤ 90%;
▪ Ambient air: not suitable for locations with corrosive, severely contaminated, flammable gases, or severe vibrations;
▪ In the event of an earthguake, the seismic intensity must not exceed 8 on the Richter scale.
Main technical parameters
| Project | Unit | Parameters | |
| Rated Voltage | kV | 40.5 | |
| Rated insulation level | Lightning impulse withstand voltage(full wave) | kV | 185 |
| Powerfrequency withstand voltage(1min) | 95 | ||
| Rated Frequency | Hz | 50 | |
| Rated Current | A | 630;1250;1600;2000 | |
| Rated short-circuit breaking time | Power frequency withstand voltage(1min) | kV | 20、25、31.5 |
| Rated short-circuit closing current(peak) | kA | 50、63、80 | |
| Rated dynamic stability current(peak) | kA | 50、63、80 | |
| 4s thermal stability current(effectivevalue) | kA | 20、25、31.5 | |
| Ingress protection rating | IP4X | ||
| Externaldimensions(w×dch) | Vacuum circuit breaker cabinet | mm | 1400x2800x2600 |
| SF6 circuit breaker cabinet | |||
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