KYN28A-12 armored movable AC metal-enclosed switchgear
Overview
KYN28A-12 is a new generation switchgear that integrates high safety standards, intelligent expansion, and low life-cycle costs. It is suitable for 3.6–12kV three-phase AC 50Hz power grids, functioning to receive and distribute electrical energy while providing control, monitoring, and protection for circuits.
Brief Introduction
Ⅰ.Distribution introduction
1.Rated Voltage: 12kV
2.Rated Current: 630A–4000A
3. Protection Level: IP4X (Enclosure)/IP2X (Compartments)
4. Applicable Standards: IEC 62271-200, GB 3906
Ⅱ.Applicable Conditions and Scope
1.Altitude: Below 2000m
2. Ambient Temperature: Maximum +40°C, Minimum -15°C
3.Ambient Humidity: Daily Average ≤95%, Monthly Average ≤90%
4.Seismic Resistance: Seismic intensity not exceeding 8 degrees
5.Ambient air should not contain corrosive, flammable gases, water vapor, or other significant pollutants
6.No severe pollution or frequent violent vibration; harsh condition designs meet Level 1 requirements
Ⅲ.Component Testing
1.Key processes (trolley assembly, busbar connection) 100% fully inspected
2.72-hour energized aging test before shipment (including 200 mechanical operation cycles)
3.Key components (circuit breakers, transformers) use a unique coding traceability system
Product Features
Ⅰ.Feature Introduction
1.Fully Sealed Armored Structure: Uses imported aluminum-zinc coated steel plate with thickness ≥2.0mm, passing internal arc fault test (IAC AFLR 25kA/1s)
2.Modular Design: Standard compartment width 800mm, depth 1500mm, achieving complete isolation of circuit breaker chamber, busbar chamber, and cable chamber
3.Visual Window: Equipped with double-layer explosion-proof viewing windows for direct observation of circuit breaker status and trolley position
4.Five Protection Interlocks: Mechanical + electrical + programmable lock triple interlocking, certified by national authoritative institutions
5.Grounding System: Equipped with visible grounding switches to ensure maintenance safety
6.Protection Level: IP4X (Enclosure)/IP2X (Compartments)
II.Product Advantages
1.Arc Protection: Passes internal arc fault tests, ensuring personnel safety within the obstacle range
2.Insulation Performance: Uses composite insulation technology, reducing volume by 35% compared to traditional equipment
3.Operational Safety: Mechanical life up to 10,000 cycles, electrical life up to 10,000 cycles
4.Modular Design: Key components feature quick-change structures, reducing average repair time by 70%
5.User-Friendly Operation: Equipped with electric chassis car, operational force less than 80N
6.Maintenance Convenience: Spacious maintenance space, supports rear door opening for easier maintenance
III.Benefits
1.Reduces inspection personnel by 60%
2.Preventive maintenance replaces post-accident repairs, saving over 40% in annual maintenance costs
3.Low-resistance design saves approximately 12,000 kWh per year
4.Reduces power outage losses and improves power supply reliability
5.Personnel Safety: Eliminates the possibility of misoperation, protecting operational staff
6.Equipment Safety: Early warning system detects potential faults 10 days in advance, avoiding major accidents
7.Grid Safety: Quickly isolates faults, minimizing the scope of power outages
Product structure
Ⅰ.Overall Structure Overview
KYN28A-12 adopts a modular metal-clad design, achieving high safety and easy maintenance through the following core structures:
1.Fully Enclosed Metal Enclosure: 2mm high-quality cold-rolled steel plate welding, surface epoxy powder coating
2.Independent Functional Compartments: Physical isolation of circuit breaker chamber, busbar chamber, cable chamber, and instrument compartment
3.Removable Functional Units: Circuit breakers, PTs, lightning arresters, etc., are installed on withdrawable trolleys
II.Core Structural Components Description
| Structural Component | Technical Features | Functional Advantages |
|---|---|---|
| Metal-Clad Enclosure | • Integral welded frame structure | Dual protection: electromagnetic shielding + mechanical protection |
| • Internal partition thickness ≥1.5mm | ||
| • Protection level IP4X (enclosure)/IP2X (compartments) | ||
| Circuit Breaker Trolley System | • Precision ball guide rails (operational force ≤150N) | Core component replacement within 5 minutes |
| • Three-position mechanical positioning (Work/Test/Isolate) | ||
| • VS1/VD4 circuit breaker compatible design | ||
| Busbar Chamber | • Fully enclosed asymmetric arrangement | Reduced eddy current losses, improved current carrying capacity |
| • Silver-plated copper bar contact surfaces (contact resistance ≤20μΩ) | ||
| • Insulation support creepage distance ≥240mm | ||
| Cable Chamber | • Removable rear sealing plate (6 bolts fixed) | Supports top/bottom cable entry, optimized installation space |
| • Cable clamping + stress cone structure | ||
| • Grounding switch visual window design | ||
| Intelligent Instrument Compartment | • Independent electromagnetic shielding layer | Anti-interference design for secondary systems |
| • Standard 35mm rail mounting (supports 6U equipment) | ||
| • Transparent explosion-proof viewing window (withstands 7J impact) |
Ⅲ.Special Structural Options
1. High-Altitude Type: Enhanced insulation design (suitable for 4000m, power frequency withstand voltage increased by 20%)
2. Seismic Type: Horizontal support beams + shock absorbers (seismic resistance 8 degrees)
3. Intelligent Type: Prefabricated sensor mounting positions (temperature + partial discharge monitoring)
Specification
I. Switchgear Technical Parameters
| Item | Parameters |
|---|---|
| Rated Voltage | 12kV |
| Rated Current | 630A–4000A |
| Rated Short-Circuit Breaking Current | 25kA/31.5kA/40kA |
| Rated Frequency | 50Hz |
| Protection Level | IP4X (Enclosure)/IP2X (Compartments) |
| Applicable Standards | IEC 62271-200, GB 3906 |
II. VD4, VS1-12 Vacuum Circuit Breaker Technical Parameters
| Parameter Item | VS1 Series | VD4 Series (ABB Technology) |
|---|---|---|
| Rated Voltage | 12kV | 12kV |
| Rated Current | 630A/1250A/1600A/2500A/3150A/4000A | |
| Rated Short-Circuit Breaking Current | 25kA/31.5kA/40kA | 31.5kA/40kA/50kA |
| Rated Short-Time Withstand Current | 25kA/31.5kA/40kA (4s) | 31.5kA/40kA/50kA (4s) |
| Mechanical Life | 30,000 cycles | 20,000 cycles |
| Electrical Life | 30 full-capacity breaks | 100 full-capacity breaks (E2 class) |
| Operating Mechanism | Spring energy storage (electric/manual optional) | Spring energy storage + permanent magnet retention |
| Contact Material | Conventional alloy | CuCr alloy (low cutoff current) |
| Protection Level | IP4X (cabinet installation) | IP4X (cabinet installation) |
| Typical Applications | Conventional industrial distribution | Data centers, metallurgy, high-frequency/high-demand applications |
When using KYN28A-12 armored movable AC metal-enclosed switchgear, you may want to know the following questions & answers.
Ⅰ.Basic Product Questions
1.What is the rated parameter range of this equipment?
Standard configuration is 12kV voltage level, rated current 630A–4000A, short-circuit breaking capacity 25kA–40kA. Special specifications can be customized.
2.Can the protection level meet outdoor installation requirements?
Standard protection level is IP4X (enclosure)/IP2X (compartments). Outdoor installation requires an optional IP54 protective cover (additional cost).
Ⅱ.Structure and Operation Questions
1.Are special tools required for trolley operation?
Standard manual operating handle (stored inside the cabinet) is included, no additional tools needed. Electric operating mechanism is optional.
2.How is the effectiveness of the five protection interlocks verified?
Each unit undergoes before shipment:
①200 forced misoperation tests (simulating incorrect operation sequences)
②Interlock mechanism wear detection (≤0.1mm)
Ⅲ.Maintenance and Troubleshooting
1. What testing instruments are needed for routine maintenance?
Basic maintenance requires only:
①500V megohmmeter (insulation test)
②Micro-ohmmeter (contact resistance measurement)
③Conventional mechanical lubricant
2.How to troubleshoot "trolley cannot be racked in" failure?
Step-by-step handling:
①Check if the grounding switch is open
②Confirm the circuit breaker is in the open position
③Check for foreign object obstruction in the rails
④ Contact after-sales personnel (free video guidance support)
Ⅳ.Intelligent Expansion Questions
1. Does later installation of intelligent monitoring require power outage?
Standard reserved interfaces support live installation (Note: must be performed by professionals).
2.Is the communication protocol compatible with third-party systems?
Supports:
①Standard Modbus RTU protocol
②Optional IEC 61850 protocol (must be specified in advance)
Ⅴ.Technical Upgrade Questions
1. Can old equipment be upgraded to an intelligent version?
Supports the following upgrades:
①Installation of intelligent monitoring units (requires model verification)
②Electronic transformation of mechanical interlocks
③Communication interface expansion (provides upgrade evaluation report services)
2.How to handle equipment after its service life expires?
Provides:
①Residual value assessment services
②Trade-in programs
③Environmentally friendly recycling treatment (compliant with RoHS standards)
Why Choose us ？
Built to last, engineered to perform.
Kete Transformer is a key national-level manufacturer specializing in transformers, recognized as a “Contract-Honoring and Promise-Keeping” enterprise, a high-tech enterprise, and a national-level enterprise technology center. It is recommended in the national directory for rural and urban power grid construction and renovation, as well as a recommended supplier of major electromechanical equipment for hydropower projects. Its products have been awarded the title of “National Quality Inspection Qualified Product – Quality Trustworthy Product” and “Nationally Recognized Product for Mechanical Industry Users.
Our Project
Our products not only dominate the domestic market but are also exported to more than 30 countries and regions, including Russia, Southeast Asia, Africa, and the Americas, serving industries such as power, municipal engineering, metallurgy, and petrochemicals.
