ZTelec KYN28-12 Metal-Clad Medium Voltage Switchgear - 12kV withdrawable switchgear cabinet for substations, power plants, and industrial applications. Certified with ISO9001, CE, CB, and CCC.
ZTelec KYN28-12 medium voltage switchgear is designed for 3.6kV, 7.2kV, and 12kV three-phase AC 50Hz/60Hz power systems. It is used to receive and distribute power while offering reliable circuit control, monitoring, and protection.
►Rated Frequency: 50Hz / 60Hz
►Max Voltage: Up to 12kV
►Max Current: Up to 4000A
►Proven reliability in over 50 countries
►Applications: Substations, power plants, grids, mining, motor control
►Standards: IEC60298, IEC6094, GB3906, DL404, DIN.VDE670
► Ambient air temperature: -10°C to +40°C
► Altitude: ≤1000m;
► Relative humidity: the daily average relative humidity is not more than 95%, and the monthly average relative humidity is not more than 90%;
► Earthquake: the magnitude does not exceed 8;
► The surrounding air should not be polluted by corrosive or combustible gases, water vapor, etc;
► There is no serious pollution and frequent severe vibration, and the severity design meets the requirements of category 1 under severe conditions.
► Vapor Pressure: Daily ≤2.2kPa, Monthly ≤1.8kPa
► Installation Inclination: ≤5°
► No vibration, corrosion, or conductive dust
A. Handcart
The frame of the handcart is made of thin steel plates processed by CNC machine tools and then riveted and welded. According to the application,handcarts can be divided into circuit breaker handcarts,voltage transformer handcarts, isolation handcarts,metering handcarts,etc.Handcarts of the same specification can be replaced.The handcart has an isolation position,a test position and a working position in the cabinet,and each position is equipped with a positioning device to ensure that the handcart cannot be moved casually when it is in the positions mentioned above,and the interlock must be released when the handcart is moved.
B. Busbar chamber
The busbar is led from one switchgear to another,and fixed by the branch busbar and the static contact box.The flat branch busbar is connected to the static contact box and the main busbar by bolts,without any other clamp or insulator connection.When the user and project have special needs,the connecting bolts on the busbar can be encapsulated with insulation and end caps.When the busbar passes through the partition of the switch cabinet,fix it with the busbar bushing. If an internal fault arc occurs,it can limit the accident from spreading to adjacent cabinets and ensure the mechanical strength of the busbar.
C. Cable chamber
Current transformers,grounding switches,lightning arresters and cables can be installed in the chamber,and a detachable aluminum plate with slots can be prepared at the bottom to ensure convenient construction on site.
D. Relay instrument chamber
The relay instrument chamber is used to install various components such as relays,instruments,signal indicators,and operationswitches.In addition,a small busbar room can be added on the top of the instrument room according to users’ requirements,and sixteen control small busbars can be laid.
E. Pressure relief device
There is a pressure relief device above the handcart room,busbarroom,and cable room.When an internal fault arc occurs in the circuit breaker,main busbar,and cable room,the internal air pressure of the switchgear rises with the occurrence of the arc.After reaching a certain pressure,the pressure of the top device is released,the metal plate will be opened automatically to release the pressure and discharge the gas to ensure the safety of the operator and the switchgear.
F. Lock device
The connection between the middle door and the cabinet body adopts a lock structure,and is equipped with a lifting mechanism,which makes the opening of the middle door more convenient.When the middle door is closed,the connection strength between it and the cabinet body is better,which enhances the ability to effectively combat internal arcing faults.
►Anti-corrosion and salt-spray protection
►Compatible with VS1, Schneider HVX, ABB VD4 circuit breakers
►Five interlocking safety functions (IP2X/IP4X)
►2–3mm aluminum-zinc sheet, multi-bent and CNC processed
►Epoxy electrostatic powder coating – 50 years without peeling
►High-strength, heat-dissipating tin-plated copper busbars
►Cleanroom production ensures insulation quality
►Workers trained for 6+ months
►Automatic terminal crimping for reliable wiring
►Precision copper busbar processing (cutting, punching, bending)
►Full pre-shipment testing
| Name | Unit | Data | |
| Matched circuit breaker | |||
| ZN63A-12(VS1) | VD4 | ||
| Rated voltage | KV | 12 | 12 |
| 1min powerfrequency withstandvoltage | kV | 42 | 42 |
| Ratedimpulse withstandvoltage(peak) | kV | 75 | 75 |
| Bated frequency | Hz | 50 | 50 |
| Ratedcurrent | A | 630、1250、1600、2000、2500、3150、4000、5000 | |
| Rated current ofbranchbusbar | A | 630、1250、1600、2000、2500、3150、4000、5000 | |
| Ratedshort-time withstand current(virtualvalue) | kA | 16、20、25、31.5、40、50 | 16、20、25、31.5、40、50 |
| Rated peak withstand current | kA | 40、50、63、80、100、125 | 40、50、63、80、100、125 |
| Rated shortcircuitduration | S | 4 | |
| Protectionlevel | The sell isIP4XanditisIP2Xwhenthecompartmentdoorandhandcart doorisopened | ||
| Weight | kg | 700-1200 | 700-1200 |
To ensure accurate manufacturing and delivery, customers are advised to provide:
►Main and auxiliary circuit diagrams
►Equipment layout and room plans
►Preferred electrical component brands/models
►Cable entry/exit details, bus bridge dimensions if applicable
►Any custom requests can be discussed with ZTelec
►Certified by ISO, CE, CB, CCC
►Strict SQA quality management system
►Fast response with custom electrical design support
►Quick delivery, shipping globally in as fast as 15 days
►Comprehensive after-sales service
►Factory visits and OEM/ODM available
Email: support@ztelecgroup.com
WhatsApp / WeChat: +86 13137718313
Website: www.ztelecpro.com
Need a switchgear with special requirements? ZTelec offers full OEM & ODM customization services. Send us your specifications today!
