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KYN28-12 Armored Withdrawable AC Metal-Enclosed Switchgear - China Suppliers and Factory for High Voltage Energy Solutions
Basic Product Overview
KYN28-12 high-voltage switchgear cabinet (labeled as — feeder cabinet), a mainstream indoor metal-clad switchgear widely used in 10kV power distribution systems. As a core device in medium-voltage power grids, it undertakes the tasks of power receiving, distribution, fault protection, and operational monitoring, and is widely applied in substations, industrial and mining enterprises, commercial buildings, and urban power distribution networks.
The KYN28-12 cabinet (also known as "KYN28A-12") adopts a withdrawable, compartmentalized metal-enclosed structure (complying with GB3906-2020 and IEC 62271-200 standards). Its design separates the cabinet into independent functional compartments through grounded metal partitions:
- Circuit Breaker Compartment
- Busbar Compartment
- Cable Compartment
- Secondary Control Compartment
This compartmentalized structure prevents fault expansion between compartments and improves the safety of operation and maintenance. The cabinet functions as a feeder cabinet — responsible for distributing power from the main busbar to downstream equipment or lines — and is marked with model "KYN28-12" (applicable to 12kV systems).
Application Scenarios
The secondary circuit uses plug-in connectors, simplifying wiring and maintenance.
As a feeder cabinet, the KYN28-12 is mainly used to distribute power from the main busbar to downstream loads (e.g., transformers, motors, or other distribution cabinets). Typical application scenarios include:
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Industrial Plants: Power distribution for high-power equipment (e.g., pumps, fans, production lines) in steel, chemical, and manufacturing industries.
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Commercial Buildings: Power supply for lighting, air conditioning, and elevators in shopping malls, office buildings, and hospitals.
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Urban Substations: 10kV distribution network outgoing lines, connecting to residential area transformers.
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Renewable Energy Systems: Connecting wind/solar power generation units to the grid (with customized protection functions).
In summary, the KYN28-12 feeder cabinet is a mature, reliable 10kV high-voltage switchgear with standardized parameters, safe compartmentalized design, and comprehensive protection functions. It balances operational safety, maintenance convenience, and system stability, making it one of the most widely used medium-voltage switchgear in the current power distribution industry.
Core Technical Parameters
Rated Voltage
12kV (adapted to 10kV power systems; maximum operating voltage: 12kV)
Rated Frequency
50Hz (matches the standard power grid frequency in most countries and regions)
Rated Current
- Main circuit: 630A, 1000A, 1250A, 1600A
- Auxiliary circuit: 220V / 380V
Short-Circuit Withstand
- Withstand current: ≥25kA (4s duration)
- Peak withstand current: ≥63kA
Insulation Level
- Power freq. withstand (1min): 42kV
- Lightning impulse withstand: 75kV
IP Protection Grade
IP4X standard (prevents solid objects ≥1mm from entering). IP54 available for harsh environments.
Operating Conditions
Temperature: -10℃ to +40℃ (derating 1%/℃ above 40℃)
Altitude: ≤1000m (derating required above 1000m)
Humidity: Daily avg ≤95%, monthly avg ≤90% (no condensation)
Detail Pictures
Frequently Asked Questions (FAQ)
Q
What is the KYN28-12 switchgear cabinet used for?
A
The KYN28-12 is a medium-voltage indoor metal-clad switchgear designed for 10kV power distribution systems. It is primarily used as a feeder cabinet to distribute power from the main busbar to downstream equipment such as transformers, motors, and other distribution cabinets. It also performs fault protection and operational monitoring functions.
Q
What standards does the KYN28-12 comply with?
A
The KYN28-12 cabinet complies with Chinese national standard GB3906-2020 and international standard IEC 62271-200. These standards govern the design, performance, and safety requirements for metal-enclosed medium-voltage switchgear.
Q
What are the main rated current options available for the KYN28-12?
A
The KYN28-12 main circuit is available in several rated current specifications: 630A, 1000A, 1250A, and 1600A. For typical feeder cabinet applications, 630A and 1250A configurations are most commonly used. The auxiliary circuit operates at 220V or 380V for powering control, protection, and monitoring components.
Q
What is the IP protection rating of the KYN28-12, and can it be used in harsh environments?
A
The standard IP protection grade is IP4X, which prevents solid objects of 1mm or larger from entering the enclosure, making it suitable for typical indoor dry environments. For more demanding or harsh environments, a customized IP54 rating is available, providing additional protection against dust and water ingress.
Q
What are the operating temperature and altitude limitations of the KYN28-12?
A
The KYN28-12 operates normally within a temperature range of -10℃ to +40℃. For every 1℃ increase above 40℃, the rated capacity should be derated by 1%. Regarding altitude, the cabinet is designed for use at ≤1000m above sea level; installations at higher altitudes require appropriate derating to ensure safe and reliable operation.
Q
Can the KYN28-12 be used in renewable energy applications such as wind or solar power?
A
Yes. The KYN28-12 feeder cabinet can be configured for renewable energy systems, including wind and solar power generation. With customized protection functions tailored to the specific requirements of these applications, it serves as a reliable interface between the generation units and the power grid, ensuring safe and stable grid connection.