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China KYN61-40.5 Armored Withdrawable AC Metal-Enclosed Switchgear - Reliable Suppliers & Factory Solutions
Basic Overview
This KYN61-40.5 type high-voltage switchgear is a core electrical equipment widely applied in 35kV power distribution systems. It's designed for receiving, distributing, and protecting high-voltage electrical energy, typically used in power plants, substations, industrial and mining enterprises, and large-scale commercial buildings.
The KYN61-40.5 cabinet adopts a metal-clad, compartmentalized structure (complying with GB3906-2020 standards), which separates functional areas — such as the circuit breaker compartment, busbar compartment, cable compartment, and secondary control compartment — with grounded metal partitions. This design effectively prevents the spread of faults between compartments and enhances operational safety. The cabinet shown is an "incoming line cabinet" (responsible for connecting the external power supply to the distribution system), marked with "ANN1" (cabinet number) and "1250A" (rated current of the main circuit).
Application Scenarios
As an incoming line cabinet, it serves as the "entry point" of the 35kV power distribution system: it connects the power supply (e.g., from a substation) to the busbar, distributes power to outgoing line cabinets, and provides protection for the entire system.
- Medium and large-scale industrial plants (e.g., steel mills, chemical plants) that require stable high-voltage power supply.
- Urban substations (as part of the 35kV/10kV transformation system).
- Large commercial complexes (to meet the high-power electricity demand of multiple equipment).
The KYN61-40.5 (1250A) incoming line cabinet is a high-reliability, safe high-voltage switchgear with standardized parameters and a modular structure. It balances operational convenience and fault protection, making it a key device in modern 35kV power distribution networks.
Technical Parameters
⚡ Rated Voltage
40.5 kV
Adapted to 35kV power systems; max operating voltage 46kV
🔄 Rated Frequency
50 Hz
Compatible with standard power grids in China and most regions
🔌 Rated Current (Main)
1250 A
Supports long-term operation; optional: 630A, 1000A, 1600A, etc.
🔌 Auxiliary Circuit
220V / 380V
For control, protection, and monitoring components
⚠️ Short-Time Withstand Current
≥ 25 kA
Duration: 4s; withstands short-circuit impact within specified time
⚠️ Peak Withstand Current
≥ 63 kA
Resists instantaneous peak current generated by short circuits
🛡️ Power Freq. Withstand Voltage
95 kV
1 min; between live parts and ground; between different phases
⛈️ Lightning Impulse Voltage
185 kV
Protects against overvoltage caused by lightning strikes
🔒 IP Protection Grade
IP4X
Prevents solid foreign objects ≥1mm from entering; suitable for indoor installation
🌡️ Operating Temperature
-10°C to +40°C
Normal operation; derating required when exceeding this range
Detail Pictures
Frequently Asked Questions
Q
What is the KYN61-40.5 high-voltage switchgear used for?
The KYN61-40.5 is a metal-clad, compartmentalized high-voltage switchgear designed for 35kV power distribution systems. It is used for receiving, distributing, and protecting high-voltage electrical energy in power plants, substations, industrial facilities, and large commercial buildings.
Q
What does the "1250A" marking on the KYN61-40.5 cabinet indicate?
The "1250A" marking refers to the rated current of the main circuit. It means the cabinet can support continuous long-term operation under a current of 1250 amperes. Other optional current ratings include 630A, 1000A, and 1600A.
Q
What standard does the KYN61-40.5 comply with?
The KYN61-40.5 switchgear complies with the GB3906-2020 standard for metal-clad switchgear and controlgear. This ensures the compartmentalized structure meets safety and performance requirements for high-voltage electrical equipment.
Q
What is the IP protection grade of the KYN61-40.5, and where can it be installed?
The KYN61-40.5 has an IP4X protection grade, which prevents solid foreign objects of 1mm or larger from entering the enclosure. This makes it suitable for indoor installation environments such as substations, industrial plants, and commercial building power rooms.
Q
What is the lightning impulse withstand voltage of the KYN61-40.5?
The KYN61-40.5 has a lightning impulse withstand voltage of 185kV. This high insulation level ensures the switchgear can protect the power distribution system against overvoltage caused by lightning strikes and other transient surges.
Q
What are the typical application industries for the KYN61-40.5 incoming line cabinet?
The KYN61-40.5 incoming line cabinet is widely used in medium and large-scale industrial plants such as steel mills and chemical plants, urban substations as part of 35kV/10kV transformation systems, and large commercial complexes requiring high-power electricity distribution for multiple equipment loads.