KYN28-12 armored removable AC metal-enclosed switchgear are suitable for 3.6-12KV three-phase AC 50Hz power grids, used for receiving and distributing electrical energy, as well as monitoring, controlling, and protecting circuits. It can be used as a complete set of power distribution equipment for single busbar and single busbar segmented systems, mainly used for power transmission to power plants, small and medium-sized generators, distribution to industrial and mining enterprises and institutions, and secondary substations for power systems. This switchgear is required by standards such as DL/T40491, IEC298, GB3906, and has complete and reliable anti misoperation functions.
1. Surrounding air temperature: -10 ℃~+40 ℃, daily average not exceeding 35 ℃
2. Relative humidity: daily average not exceeding 95%, monthly average not exceeding 90%
3. Seismic intensity: not exceeding 8 degrees
4. The surrounding air should not be significantly polluted by corrosive substances, flammable gases, water vapor, etc
5. Places without frequent severe vibrations.
6. When the usage environment exceeds the above regulations, consultation with the manufacturer is required.
Armored Removable AC Metal enclosed switchgear use aluminum zinc coated plates processed and assembled by CNC machine tools, with high dimensional accuracy, short production cycle, good mechanical strength, and beautiful appearance. The main busbar room, circuit breaker handcart room, cable room, and instrument room are completely isolated with metal partitions for better safety performance. The entry and exit operation of the handcart is flexible and lightweight, with clear and distinct position indications. The grounding switch for quick opening and closing operations allows for the closure of short-circuit currents, and the mechanical interlocking is complete and reliable.
Enclosed metal armored withdrawable AC switchgear are suitable for use with various handheld circuit breakers, such as VD4, VS1, ZN73, VEP, etc. Fixed installation load switches such as FK (R) N32-12 or VC series vacuum contactors can also be selected.
The circuit breaker room door has explosion-proof function and has passed the internal arc fault test. The cabinet is composed of no welding points and is designed with mechanical and electrical interlocking.
KYN28-12 armored removable AC metal-enclosed switchgear: A Comprehensive Overview
Introduction
The KYN28-12 armored removable AC metal-enclosed switchgear is a highly advanced and widely used medium-voltage switchgear solution in power distribution systems. Designed to meet stringent safety, reliability, and performance standards, this switchgear is suitable for indoor applications in industries, commercial buildings, and utility substations. Its robust construction, modular design, and advanced protection features make it a preferred choice for engineers and operators worldwide.
This article provides an in-depth exploration of the KYN28-12 switchgear, covering its design features, technical specifications, operational advantages, applications, and maintenance requirements. By the end, readers will gain a thorough understanding of why this equipment is integral to modern electrical infrastructure.
1. Design and Construction Features
The KYN28-12 switchgear is characterized by its metal-enclosed, armored, and removable design, ensuring high levels of safety and operational flexibility. Key design elements include:
1.1 Metal-Enclosed Structure
The switchgear is constructed with high-quality steel panels, providing mechanical strength and protection against environmental factors.
The enclosure is divided into distinct compartments for circuit breakers, busbars, cables, and low-voltage control units, ensuring segregation and minimizing the risk of internal faults.
1.2 Removable (Draw-Out) Mechanism
The circuit breaker is designed as a removable (draw-out) unit, allowing for easy maintenance and replacement without de-energizing the entire system.
The mechanism includes safety interlocks to prevent operator errors, such as inserting or removing the breaker under load.
1.3 Armored Protection
The armored design enhances resistance to internal arc faults, protecting personnel and equipment from potential explosions or arc flashes.
Reinforced panels and insulated barriers further improve safety during abnormal conditions.
2. Technical Specifications
The KYN28-12 switchgear operates at a rated voltage of 12kV and is designed for AC power systems with frequencies of 50Hz or 60Hz. Key specifications include:
Rated Current: Up to 4000A (depending on configuration).
Short-Circuit Breaking Capacity: Typically 31.5kA or higher, ensuring reliable fault interruption.
Insulation Level: Compliant with IEC 62271-200 standards, with high dielectric strength.
Operating Temperature Range: -10°C to +40°C, suitable for most indoor environments.
2.1 Busbar System
The switchgear features a fully insulated busbar system, reducing the risk of phase-to-phase faults.
Copper or aluminum busbars are available, depending on current-carrying requirements.
2.2 Circuit Breaker Options
Vacuum circuit breakers (VCBs) are commonly used due to their long service life, low maintenance, and eco-friendly operation (no SF6 gas).
The breakers are equipped with spring-operated or motor-driven mechanisms for reliable switching.
3. Operational Advantages
The KYN28-12 switchgear offers numerous benefits, making it a top choice for medium-voltage applications:
3.1 Safety
Arc-Resistant Design: The armored enclosure contains and redirects arc energy away from operators.
Earthing System: Integrated grounding switches ensure safe maintenance procedures.
3.2 Reliability
The modular design allows for future expansion or reconfiguration without major downtime.
Advanced protection relays (e.g., overcurrent, earth fault) enhance system stability.
3.3 Maintenance Efficiency
The draw-out design simplifies inspection and servicing.
Condition monitoring features (e.g., temperature sensors, digital interfaces) enable predictive maintenance.
4. Applications
The KYN28-12 switchgear is versatile and widely deployed in:
Industrial Plants: For motor control centers and transformer protection.
Commercial Complexes: Ensuring uninterrupted power supply to high-rise buildings.
Renewable Energy Systems: Integrating solar/wind farms into the grid.
Data Centers: Providing fault-tolerant power distribution.
5. Installation and Maintenance Guidelines
5.1 Installation
Ensure proper alignment and grounding during setup.
Verify clearance distances as per local regulations.
5.2 Maintenance
Regular inspection of contacts, insulation, and mechanical components.
Lubricate moving parts and test protection relays annually.
Conclusion
The KYN28-12 armored removable AC metal-enclosed switchgear stands out for its safety, reliability, and adaptability in medium-voltage networks. Its robust construction, coupled with advanced protection features, ensures optimal performance in demanding environments. By adhering to proper installation and maintenance practices, operators can maximize the lifespan and efficiency of this critical equipment.
For engineers and facility managers, understanding the KYN28-12's capabilities is essential for designing resilient and future-proof electrical systems. Whether in industrial, commercial, or utility settings, this switchgear remains a cornerstone of modern power distribution.
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