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KYN61-40.5 Armored Withdrawable AC Metal-Enclosed Switchgear - Quality China Suppliers & Factory Solutions
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 in the image 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
| ⚙️ Parameter | Specification |
|---|---|
| ⚡Rated Voltage | 40.5kV (adapted to 35kV power systems, with a maximum operating voltage of 46kV) |
| 🔄Rated Frequency | 50Hz (compatible with standard power grids in China and most regions) |
| 🔌Rated Current — Main Circuit | 1250A (supports long-term operation; optional: 630A, 1000A, 1600A, etc.) |
| 🔌Rated Current — Auxiliary Circuit | 220V / 380V (for control, protection, and monitoring components) |
| 💥Rated Short-Time Withstand Current | ≥25kA (duration: 4s; able to withstand short-circuit impact within the specified time) |
| ⚡Rated Peak Withstand Current | ≥63kA (resists instantaneous peak current generated by short circuits) |
| 🛡️Power Frequency Withstand Voltage (1 min) | 95kV (between live parts and ground; between different phases) |
| ⛈️Lightning Impulse Withstand Voltage | 185kV (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℃ to +40℃ (normal operation; derating required when exceeding this range) |
Detail Pictures
Frequently Asked Questions (FAQ)
Q
What is the KYN61-40.5 high-voltage switchgear primarily used for?
The KYN61-40.5 is primarily used for receiving, distributing, and protecting high-voltage electrical energy in 35kV power distribution systems. It is widely applied in power plants, substations, industrial and mining enterprises, and large-scale commercial buildings as an incoming line cabinet.
Q
What standard does the KYN61-40.5 cabinet comply with?
The KYN61-40.5 cabinet complies with the GB3906-2020 standard. It adopts a metal-clad, compartmentalized structure with grounded metal partitions separating the circuit breaker compartment, busbar compartment, cable compartment, and secondary control compartment.
Q
What are the available rated current options for the main circuit?
The standard configuration shown is 1250A for the main circuit. However, optional specifications are also available, including 630A, 1000A, and 1600A, allowing flexibility to match different power distribution requirements.
Q
What is the IP protection grade of the KYN61-40.5 switchgear, 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 facilities, and commercial buildings.
Q
How does the compartmentalized structure improve safety?
The compartmentalized structure uses grounded metal partitions to physically isolate functional areas within the cabinet. This design effectively prevents fault propagation between compartments — for example, an arc fault in the cable compartment will not spread to the busbar compartment — significantly enhancing operational safety and reducing the risk of cascading failures.
Q
What is the operating temperature range of the KYN61-40.5 switchgear?
The KYN61-40.5 is designed for normal operation within a temperature range of -10℃ to +40℃. If the ambient temperature exceeds this range, derating measures are required to ensure the safe and reliable operation of the equipment.