KYN/PV-12 Series Switchgears
Our KYN28 switchgear provides modular design and high-tech structural parts, suitable for three phase power system of 3.6kV-12kV and 50Hz. It can work well with enclosed vacuum circuit breaker, vacuum contactor, fuse cabinet and vacuum load switch. It’s commonly used for energy receiving and distributing as well as circuit controlling, protecting and monitoring.
Structure Features of Our Switch Cabinet
1. Metal-clad switchgear, equipped with handcart
2. Air insulation
3. Our switchgear adopts independent grounding method and has 4 separate compartments: busbar, handcart, cable and meter compartment
4. Equipped with modular structure and plug-in electrical connection method.
Parameters of KYN28-12 Switchgear
| Items | Unit | Technical parameters | |
| Rated voltage | KV | 12 | |
| Rated insulation level | Power frequency withstand voltage ( 1min) | KV | 42 |
| Lightning impulse withstand voltage (peak value) | KV | 75 | |
| Rated frequency | Hz | 50,60 | |
| Rated current of main bus | A | 1250,1600,2000,2500,3150,4000 [1] | |
| Rated current of branch bus | A | 630,1250,1600,2000,2500,3150,4000[2] | |
| Rated short-time withstand current | KV | 16,20,25,31.5,40,50 | |
| Rated peak withstand current | kA | 40,50,63,80,100,125 | |
| Protection grade | Enclosure: IP4X the door of breaker cabinet: IP2X | ||
[1] Air cooling actions should be taken.
[2] The rated short-time withstand current and the rated peak withstand current of current transformer will be influenced by the transformation ratio. There should be a final confirmation when ordering.
Test Standards of KYN28 Switchgear
| Rated voltage | kV | 3.6 7.2 12 | |
| Main circuit | Power frequency withstand voltage (1 minute) | kV | 25 32 42 |
| Resistance test | µΩ | ≤ 100 RCT[1] (no load switch) | |
| Auxiliary circuit and control circuit | Power frequency withstand voltage (1 minute) | kV | 2 2 2 |
| Resistance test | MΩ | ≥ 2 ≥ 2 ≥ 2 |
[1] RCT means the direct-current resistance of current transformer
Working Conditions
Temperature: -15~40℃, the daily mean temperature should be no more than 35℃.
Humidity: The daily mean relative humidity should be no more than 95%, the monthly mean relative humidity less than 90%.
Highest altitude: 2,000m.
The earthquake intensity should be no more than 8 magnitude.
Our switch cubicle must be installed in a location without fire risk, explosion risk, pollution, chemical corrosive gas or violate vibration.
Special Working Conditions
When the installed location is 2,000 m above the sea level, clients shall consult with us and take reinforced insulation actions.
When the working temperature is over 40℃, the rated current-carrying capacity will decrease in a certain coefficient. Clients shall have a final confirmation from the manufacture factory.
All our switchgears comply with national standards or client’s requirement. All of them have passed routine test, type test and special test conducted by national labs. Those unqualified products will be picked out.
