Metal-clad Fixed Switchgear
Rated Current: 630A, 1250A (Customized)
Rated Short-circuit Breaking Current: 20kV, 25kV, 31.5kV (Customized)
Rated Short-circuit Making Current: 50kV, 63kV, 80kV (Customized)
1min Power Frequency Withstand Voltage: 42/48kV (Customized)
Lightning Impulse Withstand Voltage: 75/85kV (Customized)
Protection Level: IP4X (Customized)
Zhejiang Tianrun Electric Co., Ltd. is one of the leading manufacturers and suppliers of metal-clad fixed switchgear in China. We are committed to providing high quality customized products with competitive price. We warmly welcome you to buy bulk advanced metal-clad fixed switchgear from our factory. Also, quotation is available.
Product Overview
The KGNX-12 indoor AC metal-clad fixed switchgear adopts the company's self-developed miniaturized multi-functional vacuum circuit breaker and vacuum load switch as main components. Designed for 3.6–12 kV three-phase AC 50(60)Hz switchgear power system, it receives and distributes electrical energy while controlling, protecting and monitoring circuits. Commonly used in substations, industrial and mining enterprises and high-rise buildings, it can be used standalone or in parallel with ring main units, and is suitable for miniaturized switchgear applications. Standards: IEC 60298, IEC 60265, IEC 60420, IEC 60694, IEC 62271-200, IEC 298 (1990).
Core Features
Wide voltage & dual-frequency compatibility
Suitable for 3.6–12 kV three-phase AC 50/60 Hz power systems, covering mainstream MV distribution levels and meeting grid frequency requirements across countries.
Miniaturized compact design
Compact cabinet with small footprint, suitable for miniaturized and space-constrained distribution sites, reducing civil and installation costs.
Armored safety isolation
Four compartments (busbar, CB, cable, relay/instrument) fully isolated by grounded metal partitions, containing internal arcing and ensuring equipment and personnel safety.
Five-prevention interlocking
Comprehensive mechanical and electrical interlocking preventing incorrect CB switching, on-load disconnector operation, earthing on live parts, closing with earthing connected, and accidental entry into live compartments.
High reliability
Pollution-free, maintenance-free vacuum arc-extinguishing medium; stable spring stored-energy mechanism.
Flexible configuration & paralleling
Supports incoming, outgoing, metering, PT, sectionalizer, capacitor, auxiliary transformer schemes; usable standalone or paralleled with ring main units.
Type Designation
KGN-12 Series Main Technical Parameters
KGNX-12(V) Cabinet Technical Parameters (Circuit Breaker Cabinet)
|
Project |
Unit |
Data |
|
Rated Voltage |
kV |
3.6–12 |
|
Rated Current |
A |
630, 1250 |
|
Rated Short-circuit Breaking Current |
kA |
20, 25, 31.5 |
|
Rated Short-circuit Making Current |
kA |
50, 63, 80 |
|
Rated Short-time Withstand Current (4s effective value) |
kA |
20, 25, 31.5 |
|
Rated Peak Withstand Current (peak value) |
kA |
50, 63, 80 |
|
Grounding Loop Short-time Withstand Current (peak value) |
kA |
80 |
|
Grounding Loop Withstand Time |
S |
4 |
|
1min Power Frequency Withstand Voltage |
kV |
42/48 |
|
Lightning Impulse Withstand Voltage |
kV |
75/85 |
|
Auxiliary Circuit 1min Power Frequency Withstand Voltage |
kV |
2 |
|
Protection Level |
- |
IP4X |
KGNX-12(C), KGNX-12(F) Cabinet Technical Parameters
|
Project |
Unit |
Data |
|
|
Rated Voltage |
kV |
3.6–12 |
|
|
Rated Frequency |
Hz |
50 |
|
|
Main Busbar Rated Current |
A |
630, 1250 |
|
|
1min Power Frequency Withstand Voltage |
kV |
42/48 |
|
|
Lightning Impulse Withstand Voltage |
kV |
75/85 |
|
|
Load Switch Cabinet |
Rated Current |
A |
630 |
|
Rated Closed-Loop Breaking Current |
A |
630 |
|
|
Rated Active Load Breaking Current |
A |
630 |
|
|
Rated Cable Charging Breaking Current |
A |
10 |
|
|
No-load Transformer Capacity for Breaking |
kVA |
1600 |
|
|
Rated Short-circuit Making Current (Peak) |
kA |
50 |
|
|
Rated Thermal Stability Current (4s) |
kA |
20 |
|
|
Rated Dynamic |
kA |
50 |
|
|
Combination Electrical Cabinet |
Rated Fuse Current |
A |
200 |
|
Rated Short-circuit Breaking Current |
kA |
50 |
|
|
Rated Transfer Current |
A |
50 |
|
|
Rated Fuse Model |
- |
SDLAJ/SFLAJ/(XRNT) |
|
|
Grounding Loop Dynamic Stability Current (Peak) |
kA |
50 |
|
|
Grounding Loop Thermal Stability Current (2s) |
kA |
20 |
|
|
Auxiliary Circuit Rated Power Frequency Withstand Voltage |
V |
2000 |
|
|
Protection Level |
- |
IP4X |
|
Operating Environment Condition
- Ambient Temperature: Maximum +40°C, minimum -10°C
- Humidity: Daily average ≤95%, monthly average ≤90%
- Elevation: Below 1000 meters
- Seismic Intensity: Not exceeding 8°
- Surrounding Environment: Free from pollution such as water vapor, non-corrosive, no severe contamination or frequent intense vibration
Application Scenarios
- Urban Distribution Networks & Switching Stations - Ring power supply, cable branching and terminal distribution; parallels with ring main units for flexible distribution and fault isolation.
- Industrial & Mining - MV distribution for factories, mines and parks; handles workshop incoming, motor starting and large-load feeders with frequent operation.
- Commercial & Civil Buildings - Compact, space-saving design for high-rise, commercial complex, residential and office substations, reducing civil and switchroom costs.
- Infrastructure & Public Buildings - Airports, ports, subways, tunnels, hospitals and data centers; armored isolation and five-prevention interlocking ensure continuous, safe power supply.
- Renewable Energy Grid Connection - For box-type transformer LV sides and step-up substations in PV/wind farms; supports metering, protection and anti-islanding schemes.
- Space-Constrained Substations - Fits prefabricated box-type substations, underground switchrooms and old-station renovation.
FAQ
Q: What is KGNX-12?
A: Indoor AC metal-clad fixed switchgear, suitable for 3.6–12 kV three-phase AC 50(60)Hz distribution systems.
Q: What routine inspections are needed?
A: Regular checks on operating status, cabinet cleanliness and interlocking functions are recommended; follow the O&M manual for specific intervals.
Q: Can cabinet color or markings be customized?
A: Cabinet appearance and markings can be customized per project; confirm details when ordering.
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