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KYN28-12 Armored Withdrawable AC Metal-Enclosed Switchgear - Top China Suppliers & Factory 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 GB3906-2020IEC 62271-200). Its design separates the cabinet into independent functional compartments through grounded metal partitions:
- Circuit Breaker Compartment
- Busbar Compartment
- Cable Compartment
- Secondary Control Compartment
This design 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 the model KYN28-12 (applicable to 12kV systems) on the top panel.
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
Adapted to 10kV power systems; maximum operating voltage: 12kV
Rated Frequency
50Hz
Matches the standard power grid frequency in most countries and regions
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: ≥25kA (4s duration)
- Peak withstand: ≥63kA
Insulation Level
- Power frequency (1min): 42kV
- Lightning impulse: 75kV
IP Protection Grade
IP4X (standard)
IP54 available for harsh environments
IP54 available for harsh environments
Operating Conditions
Temperature: -10°C to +40°C
Derating by 1% per 1°C above 40°C Altitude: ≤1000m
Derating required above 1000m Humidity: Daily avg ≤95%, Monthly avg ≤90%
No condensation
Derating by 1% per 1°C above 40°C Altitude: ≤1000m
Derating required above 1000m Humidity: Daily avg ≤95%, Monthly avg ≤90%
No condensation
Detail Pictures
Frequently Asked Questions
Q What is the KYN28-12 switchgear cabinet and what is it used for?
The KYN28-12 is an indoor metal-clad, withdrawable high-voltage switchgear cabinet designed for 10kV (12kV rated) power distribution systems. It is used as a core device for power receiving, distribution, fault protection, and operational monitoring in substations, industrial plants, commercial buildings, and urban distribution networks.
Q What standards does the KYN28-12 comply with?
The KYN28-12 switchgear complies with Chinese national standard GB3906-2020 and international standard IEC 62271-200, ensuring its design, performance, and safety meet both domestic and international requirements for medium-voltage metal-enclosed switchgear.
Q What are the main rated current options available for the KYN28-12?
The KYN28-12 is available in several main circuit current ratings: 630A, 1000A, 1250A, and 1600A. For typical feeder cabinet applications, 630A and 1250A are the most commonly selected specifications. The auxiliary circuit operates at 220V or 380V for control and protection components.
Q What is the short-circuit withstand capability of the KYN28-12?
The KYN28-12 features a rated short-time withstand current of ≥25kA (sustained for 4 seconds) and a rated peak withstand current of ≥63kA. These specifications ensure the cabinet can safely handle both steady-state and instantaneous peak currents generated during short-circuit fault conditions.
Q What are the operating environment requirements for the KYN28-12?
The KYN28-12 is designed for indoor use within an ambient temperature range of -10°C to +40°C, at altitudes ≤1000m (derating required above 1000m), and in environments with a daily average relative humidity ≤95% and monthly average ≤90% with no condensation. For altitudes above 1000m or temperatures above 40°C, output derating applies.
Q Can the KYN28-12 be used in renewable energy applications?
Yes. The KYN28-12 feeder cabinet can be applied in renewable energy systems, including wind and solar power generation projects, to connect generation units to the grid. For such applications, customized protection functions can be configured to meet the specific requirements of renewable energy grid integration.