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KYN28-12 Armored Withdrawable AC Metal-Enclosed Switchgear - High-Current Solution from China Suppliers & Factory
Basic Product Overview
KYN28-12 high-voltage switchgear cabinet (labeled as feeder cabinet) is 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.
Standards Compliance: GB3906-2020 & IEC 62271-200 — Withdrawable, Compartmentalized Metal-Enclosed Structure
The KYN28-12 cabinet (also known as "KYN28A-12") adopts a withdrawable, compartmentalized metal-enclosed structure. 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 design prevents fault expansion between compartments and improves the safety of operation and maintenance. The cabinet model "KYN28-12" is applicable to 12kV systems, functioning as a feeder cabinet responsible for distributing power from the main busbar to downstream equipment or lines.
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:
- Industrial Industrial Plants: Power distribution for high-power equipment (e.g., pumps, fans, production lines) in steel, chemical, and manufacturing industries.
- Commercial Commercial Buildings: Power supply for lighting, air conditioning, and elevators in shopping malls, office buildings, and hospitals.
- Urban Urban Substations: 10kV distribution network outgoing lines, connecting to residential area transformers.
- Renewable 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
- Short-time withstand current: ≥25kA (4s)
- Peak withstand current: ≥63kA
Insulation Level
- Power frequency withstand (1min): 42kV
- Lightning impulse withstand: 75kV
IP Protection Grade
IP4X standard; IP54 available for harsh environments
Operating Conditions
- Temperature: -10°C to +40°C (derating 1% per °C above 40°C)
- Altitude: ≤1000m (derating required above 1000m)
- Humidity: Daily average ≤95%, monthly average ≤90% (no condensation)
Detail Pictures
Frequently Asked Questions
Q
What is the difference between KYN28-12 and KYN28A-12?
KYN28-12 and KYN28A-12 refer to the same product series. The "A" designation indicates a revised or improved version of the original KYN28-12 design, but both models share the same core structure, rated voltage (12kV), and compartmentalized metal-enclosed design. They comply with the same national and international standards (GB3906-2020 and IEC 62271-200).
Q
What are the main functions of the KYN28-12 feeder cabinet?
The KYN28-12 feeder cabinet is responsible for distributing power from the main busbar to downstream loads such as transformers, motors, and other distribution cabinets. Its core functions include power receiving, power distribution, fault protection (overcurrent, short-circuit), and operational monitoring of the 10kV distribution system.
Q
What rated current options are available for the KYN28-12?
The KYN28-12 main circuit supports multiple rated current specifications: 630A, 1000A, 1250A, and 1600A. For feeder cabinet applications, 630A and 1250A are the most commonly selected configurations. The auxiliary circuit operates at 220V or 380V to power control, protection, and monitoring components.
Q
Can the KYN28-12 be used in renewable energy applications such as wind or solar power?
Yes. The KYN28-12 is suitable for renewable energy systems, including wind and solar power generation. It can be configured with customized protection functions to connect generation units to the grid, making it a flexible solution for modern energy infrastructure requirements.
Q
What environmental conditions are required for the KYN28-12 to operate properly?
The KYN28-12 is designed for indoor use under the following standard conditions: ambient temperature between -10°C and +40°C, altitude not exceeding 1000m (derating required above this), and relative humidity with a daily average ≤95% and monthly average ≤90% with no condensation. For harsh environments, an IP54 protection grade can be customized.
Q
What safety features does the compartmentalized design of the KYN28-12 provide?
The KYN28-12 uses grounded metal partitions to isolate four independent compartments: the circuit breaker compartment, busbar compartment, cable compartment, and secondary control compartment. This design prevents faults in one compartment from spreading to others, significantly improving operational safety and simplifying maintenance procedures. The withdrawable circuit breaker also allows safe isolation without de-energizing the entire busbar.