KYN28 indoor metal-clad withdrawable switchgear (hereinafter short as switchgear) is a complete power distribution device for 3.6~24kV, 3-phase AC 50Hz, single-bus and single-bus sectionalized system. It is mainly used for power transmission of middle/small generators in power plants; power receiving, transmission for substations in power distribution and power system of factories, mines and enterprises, and starting of large high-voltage motor, etc., so as to control, protect and monitor the system.
General
The switchgear meets IEC298, GB3906-91. It can be used with domestic VSI vacuum circuit breakers, VD4 from ABB, 3AH5 from Siemens, domestic ZN65A, and VB2 from GE, etc. It is truly a power distribution device with good performance.
In order to meet the requirement for wall mounting and front-end maintenance, the switchgear is equipped with a special current transformer, so that the operator can maintain and inspect it in front of the cubicle.
Service environment
a) Air temperature: Maximum temperature: +40℃; Minimum temperature: -15℃.
b) Humidity: Monthly average humidity 95%, Daily average humidity 90%.
c) Altitude above sea level: Maximum installation altitude: 1000M.
d) Ambient air not apparently polluted by corrosive and flammable gas, vapor, etc.
e) No frequent violent shake.
Structure & Basic Components of Switchgear
Overall size and weight
| Item | With VS1, VD4 inside | With 3AH5, ZN65A |
| W×D×H(mm) | 650×1400×2200 | 800(1000)×1500×2200 |
| Weight (kg) | 700 | 800 |
Structure Features
Schematics of dimensions of switchgear
Main components characteristics
 | VS1-12 indoor drawable vacuum circuit breaker. Rated voltage 12kV up to 24kV, Rated current 630A up to 4000A, Rated short circuit breaking current 20kA up to 40kA, Mechanical life 10,000 times |
 | VD4 embeded pole indoor vacuum circuit breaker. Rated voltage 12kV up to 24kV, Rated current 630A up to 4000A, Rated short circuit breaking current 20kA up to 40kA, Mechanical life 10,000 times |
 | VSM magnetic actuator indoor VCB. Rated voltage 12kV up to 24kV, Rated current 630A up to 4000A, Rated short circuit breaking current 20kA up to 40kA, Mechanical life 100,000 times |
Transportation, Maintenance and Order
Transportation and Storage: The switch cabinet can be transported by fork truck if guaranteed to be fixed on the bottom plate, and by handling or removing the entire entity if not fixed on bottom plate, but any case it should be transported vertically.
Maintenance: Free of maintenance for 3 years under the normal conditions. No need for lubrication for the load switch’s operation mechanism.
Order: The below documents are attached with the switch panel when out of factory; Qualification Certificate of Product, Installation and Operation Instruction, Packing List, Engineering Design Document of Product.
Main technical specifications
| No | Item | Unit | Parameter | ||
| 1 | Rated voltage | kV | 7.2kV, 12 kV, 17.5kV, 24kV | ||
| 2 | Rated frequency | Hz | 50/60 | ||
| 3 | Rated current | A | 630, 1250, 1600, 2000, 2500, 3150, 4000 | ||
Note: *The short circuit capacity should be considered alone.