KYN28-12 (Z)/T1250-31.5 Type Movable Indoor Metal Enclosed Switchgear

Operating Environmental Conditions：

1.Ambient air temperature:maximum+40℃,minimum-15℃

2.Humidity conditions:

• Daily average relative humidity:≤95%,daily average water vapor pressure not exceeding 2.2 kPa;
• Monthly average relative humidity:≤90%,monthly average water vapor pressure not exceeding 1.8 kPa.
• Altitude:2500 m or lower.

3.Seismic intensity:no more than Grade 8.

4.Ambient air shall be free from obvious contamination by corrosive or flammable gases,water vapor,etc.

5.The installation site shall be free from frequent severe vibration.

6.If the equipment is operated under conditions exceeding the normal requirements specified in GB 3906,mutual agreement shall be reached between the user and the manufacturer.

Ordering Notes(Must be specified when ordering):

1.Main circuit scheme number,application purpose,single-line diagram,arrangement drawing,floor plan of the distribution room,etc.

2.Schematic wiring diagram of auxiliary circuits and terminal arrangement drawing.

3.Model,specification and quantity of electrical components installed in the switchgear.

4.Requirements for control,measurement and protection functions of the switchgear,as well as requirements for other interlocking devices and automatic devices.

5.If a busbar bridge connection is required between switchgears or for the incoming cabinet,specific data including rated current-carrying capacity,span and height above ground level of the busbar bridge shall be provided.

6.Type and quantity of required accessories and spare parts.

7.Special environmental conditions for switchgear operation shall be fully specified when placing an order.

Technical Specifications：

Note:

1.The short-circuit capacity of current transformers should be considered separately.

2.The technical parameters of ZN63A-12 are detailed in the corresponding sample.

3.1000m altitude type rated current≤1250A rated breaking current≤31.5KA

Structural Features：

1. Structure of the switchgear(see figure below)
2. All-metal modular assembly structure.
3. The cabinet is made of imported aluminum-zinc coated steel sheet,processed by an FMS flexible manufacturing system,adopting advanced multiple hemming technology,and connected with pull nuts and high-strength bolts.It features high precision,corrosion resistance,light weight,high strength and strong universality.
4. It can be equipped with domestically produced ZN63A-12(VS1)series or imported IVD4 series vacuum circuit breakers,featuring wide applicability,high reliability and maintenance-free operation.
5. The withdrawable truck is provided with service and test positions,each equipped with positioning and indication devices for safe and reliable operation.
6. Trucks of the same specification are freely interchangeable with high interchangeability.
7. The withdrawable truck is transported by a special carrier,making operation easy and flexible.
8. The cable compartment can accommodate up to 9 single-core cables.
9. Reliable mechanical and electrical interlocking devices fully meet the"five-prevention"requirements.
10. Each high-voltage compartment is equipped with a pressure relief channel to ensure personal safety.
11. The front door is equipped with an observation window for viewing the operating status of internal components.

Schematic diagram of switchgear structure