KGN-12 Metal-Clad Enclosed Switchgear
The KGN-12 is a compact, high-performance 12kV metal-clad switchgear engineered for reliable power distribution. Developed with independent R&D, it features robust safety interlocks, vacuum arc extinction, and a space-saving design that cuts footprint and maintenance costs. It supports automation functions for unmanned digital substations, delivering stable, cost-effective power control solutions for modern power systems.
Description
Technical Parameters
Product Model: KGN-12 Metal-Clad Enclosed Switchgear
| Item | Unit | Parameter |
| Breaker | ||
| Rated Voltage | kV | 12 |
| Rated Current | A | 630 1250 |
| Rated Frequency | Hz | 50 50 |
| Rated Short-Circuit Breaking Current | kA | 25 31.5 |
| Rated Short-Time Withstand Current (Thermal Stability) | kA/s | 4/25 31.5/4 |
| Rated Peak Withstand Current (Dynamic Stability) | kA | 63 80 |
| Insulation Level Power Frequency Withstand Voltage (Break) | kV | 42/48 |
| Impulse Withstand Voltage (Break) | kV | 75/85 |
| Closing Speed | m/s | 0.65±0.2 |
| Opening Speed | m/s | 1.2±0.2 |
| Closing and Opening Asynchrony | ms | ≤2 |
| Closing Time | ms | ≤60 |
| Opening Time | ms | ≤50 |
| Closing Bounce Time | ms | ≤2 |
| Mechanical Life | bout | 20000 |
| Protection Level (Enclosure/Switch) | IP4X | |
| Load Switch Parameters | ||
| Rated Voltage | kV | 12 |
| Rated Current | A | 630 |
| Rated Frequency | Hz | 50 |
| Rated Active Load Breaking Current | A | 630 |
| Rated Closed-Loop Breaking Current | A | 630 |
| 5% Rated Active Load Breaking Current | A | 31.5 |
| Transfer Current | A | 3150 |
| Rated Cable Charging Breaking Current | A | 10 |
| Rated Short-Circuit Breaking Current | kA | – |
| Rated Short-Time Withstand Current (Thermal Stability) | kA/s | 4/20 |
| Rated Peak Withstand Current (Dynamic Stability) | kA | 50 |
| Insulation Level Power Frequency Withstand Voltage (Break) | kV 1min | 42/48 |
| Impulse Withstand Voltage (Break) | kV 1min | 75/85 |
| Closing Speed | m/s | 0.65±0.2 |
| Opening Speed | m/s | 1.2±0.2 |
| Closing and Opening Asynchrony | ms | ≤2 |
| Closing Time | ms | ≤60 |
| Opening Time | ms | ≤50 |
| Closing Bounce Time | ms | ≤2 |
| Mechanical Life | bout | 20000 |
| Protection Level (Enclosure/Switch) | – | IP4X |
Technical Features
·Independent R&D
The accompanying FZN57 and ZN57 switches feature a solid-sealed pole structure; the built-in independent disconnector is an independently developed product.
The circuit breaker cubicles, load switch cubicles, combined apparatus cubicles, and disconnector cubicles share identical dimensions, allowing for flexible modular combination.
Serves as a direct replacement for traditional KYN28 switchgear cubicles.
·Safe and Reliable
The A, B, and C phases within the switchgear are arranged longitudinally and incorporate through-wall partitions to ensure safety.
The overall design features an aesthetically pleasing appearance, high structural strength, and excellent corrosion resistance.
The solid-sealed poles feature an extended creepage distance, providing superior resistance to contamination.
The entire product series utilizes vacuum arc-extinguishing technology.
Both the disconnector and the earthing switch function as independent operating units, incorporating a comprehensive “Five-Prevention” interlocking system.
·Cost-Effective Investment
Optimized structure with high material utilization efficiency
Highly standardized components
·Intelligent and User-Friendly
Equipped with distribution network automation capabilities, enabling GPRS or Ethernet data transmission and “Four Remote” functions
Tailored to meet the requirements of unmanned substations and digital network-managed power stations
Low operation and maintenance costs
Resolves the issues associated with traditional equipment, such as large footprints and excessive operational space requirements
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