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KYN28-12 Armored Withdrawable AC Metal-Enclosed Switchgear - China Factory Suppliers for High-Voltage Power 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 not only prevents fault expansion between compartments but also improves the safety of operation and maintenance. The cabinet is a "feeder cabinet" responsible for distributing power from the main busbar to downstream equipment or lines, marked with 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:
- Industrial Plants: Power distribution for high-power equipment (e.g., pumps, fans, production lines) in steel, chemical, and manufacturing industries.
- Commercial Buildings: Power supply for lighting, air conditioning, and elevators in shopping malls, office buildings, and hospitals.
- Urban Substations: 10kV distribution network outgoing lines, connecting to residential area transformers.
- 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
| Parameter | Specification / Value |
|---|---|
| ⚡ 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 (feeder scenarios typically use 630A or 1250A) |
| 🔌 Rated Current — Auxiliary Circuit | 220V / 380V (for powering control, protection, and monitoring components) |
| ⚡ Short-Time Withstand Current | ≥25kA (duration: 4s; withstands steady-state short-circuit current impact) |
| ⚡ Peak Withstand Current | ≥63kA (resists instantaneous peak current generated by short-circuit faults) |
| 🛡 Power Frequency Withstand Voltage | 42kV (1 min; between live parts and ground; between different phases) |
| 🛡 Lightning Impulse Withstand Voltage | 75kV (protects against overvoltage caused by lightning strikes or switching operations) |
| 🔒 IP Protection Grade | IP4X standard (IP54 customizable for harsh environments) |
| 🌡 Operating Temperature | -10°C to +40°C (derate 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 (FAQ)
Q
What is the difference between KYN28-12 and KYN28A-12?
KYN28-12 and KYN28A-12 refer to the same product line. "KYN28A-12" is simply an updated or improved designation used by certain manufacturers to indicate a revised version of the original KYN28-12 design. Both comply with GB3906-2020 and IEC 62271-200 standards and share the same core technical parameters, compartmentalized structure, and rated voltage of 12kV.
Q
What rated current options are available for the KYN28-12 feeder cabinet?
The KYN28-12 feeder cabinet is available in multiple rated main circuit current specifications: 630A, 1000A, 1250A, and 1600A. For typical feeder applications, 630A and 1250A are the most commonly selected options. The auxiliary circuit operates at 220V or 380V to power control, protection, and monitoring components.
Q
Can the KYN28-12 be used in outdoor or high-altitude environments?
The KYN28-12 is designed for indoor use with a standard IP4X protection rating, suitable for dry indoor environments at altitudes up to 1000m. For installations above 1000m, derating of the equipment is required. In harsh or outdoor environments, an IP54 protection grade can be customized upon request to provide enhanced dust and moisture resistance.
Q
What standards does the KYN28-12 comply with?
The KYN28-12 high-voltage switchgear cabinet complies with the Chinese national standard GB3906-2020 and the international standard IEC 62271-200. These standards govern the design, testing, and performance requirements for AC metal-enclosed switchgear and controlgear for rated voltages above 1kV and up to and including 52kV.
Q
Is the KYN28-12 suitable for renewable energy applications such as wind and solar power?
Yes. The KYN28-12 feeder cabinet can be adapted for renewable energy systems, including wind and solar power generation facilities. In these applications, it serves as the grid connection switchgear, with customized relay protection and monitoring functions configured to meet the specific requirements of wind farms or photovoltaic power plants.
Q
What safety features does the compartmentalized design of the KYN28-12 provide?
The KYN28-12 uses grounded metal partitions to physically separate the circuit breaker compartment, busbar compartment, cable compartment, and secondary control compartment. This compartmentalized structure prevents arc faults or failures in one section from propagating to adjacent compartments, significantly reducing the risk of cascading failures. It also allows maintenance personnel to safely access certain compartments (e.g., the secondary control compartment) while other parts remain energized, improving operational safety.