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KYN61-40.5 Armored Withdrawable AC Metal-Enclosed Switchgear from China Suppliers and Factory
Basic Overview
This KYN61-40.5 type high-voltage switchgear, 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 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's 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. It's suitable for:
- 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).
⚡ In summary, 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
40.5kV
Adapted to 35kV power systems; max operating voltage: 46kV
Adapted to 35kV power systems; max operating voltage: 46kV
Rated Frequency
50Hz
Compatible with standard power grids in China and most regions
Compatible with standard power grids in China and most regions
Rated Current
Main circuit: 1250A (optional: 630A, 1000A, 1600A)
Auxiliary circuit: 220V / 380V
Auxiliary circuit: 220V / 380V
Short-Time Withstand Current
≥25kA (duration: 4s)
Withstands short-circuit impact within specified time
Withstands short-circuit impact within specified time
Peak Withstand Current
≥63kA
Resists instantaneous peak current from short circuits
Resists instantaneous peak current from short circuits
Insulation Level
Power frequency (1min): 95kV
Lightning impulse: 185kV
Lightning impulse: 185kV
IP Protection Grade
IP4X
Prevents solid objects ≥1mm from entering; suitable for indoor installation
Prevents solid objects ≥1mm from entering; suitable for indoor installation
Operating Temperature
-10°C to +40°C
Normal operation; derating required when exceeding this range
Normal operation; derating required when exceeding this range
Detail Pictures
Frequently Asked Questions
Q1What is the KYN61-40.5 high-voltage switchgear mainly used for?
The KYN61-40.5 is a metal-clad, compartmentalized high-voltage switchgear designed for 35kV power distribution systems. It is primarily used for receiving, distributing, and protecting high-voltage electrical energy in power plants, substations, industrial facilities, and large commercial buildings.
Q2What does the "1250A" marking on the cabinet indicate?
"1250A" refers to the rated current of the main circuit. It means the cabinet can support continuous long-term operation at up to 1250 amperes. Other optional specifications include 630A, 1000A, and 1600A to suit different load requirements.
Q3What safety standard does the KYN61-40.5 comply with?
The KYN61-40.5 complies with the GB3906-2020 standard for metal-enclosed switchgear and controlgear for AC systems with rated voltages above 1kV and up to and including 52kV. Its compartmentalized structure with grounded metal partitions ensures fault containment and enhanced operational safety.
Q4What is the insulation capability of the KYN61-40.5 switchgear?
The switchgear features a power frequency withstand voltage of 95kV (1 minute, between live parts and ground or between phases) and a lightning impulse withstand voltage of 185kV, providing robust protection against overvoltage caused by lightning strikes or switching surges.
Q5What environments is the KYN61-40.5 suitable for installation?
With an IP4X protection grade and an operating temperature range of -10°C to +40°C, the KYN61-40.5 is designed for indoor installation environments. It is suitable for industrial plants, urban substations, and large commercial complexes where stable high-voltage power supply is required.
Q6How does the compartmentalized structure improve fault safety?
The compartmentalized design separates key functional areas — including the circuit breaker compartment, busbar compartment, cable compartment, and secondary control compartment — using grounded metal partitions. This prevents faults from spreading between compartments, significantly reducing the risk of cascading failures and improving overall system safety.