Product Overview
The Indoor AC Metal-Clad Withdrawable Switchgear is a high-performance, high-reliability power distribution solution designed and manufactured in strict accordance with the IEC 62271-200 standard. This product adopts a fully metal-enclosed Armored (AIS) structure, segregating high-voltage components into independent, grounded metal compartments to ensure maximum operational safety. The core utilizes a type-tested withdrawable vacuum circuit breaker unit, making it the ideal choice for fixed indoor applications requiring frequent operation, high safety, and minimized downtime, particularly for critical distribution nodes in power generation, transmission, and large-scale industries.
Technical Specifications
|
Parameter Category |
Technical Specification |
|
Rated Voltage |
7.2kV, 12kV, 17.5kV, 24kV, AC 50/60Hz |
|
Rated Current (Main Busbar / Circuit Breaker) |
Main Busbar: Up to 3150A; Breaker Unit: 630A, 1250A, 2000A, 2500A, 3150A |
|
Rated Short-Circuit Breaking Current (Isc) |
25kA, 31.5kA, 40kA, compliant with IEC 62271-100 |
|
Rated Short-Time Withstand Current (Icw) |
Matches Isc rating, typical 25kA / 4s, 31.5kA / 4s |
|
Rated Peak Withstand Current (Ipk) |
63kA, 80kA, 100kA (2.5 x Icw), compliant with IEC 62271-1 |
|
Power-Frequency Withstand Voltage (1 min) |
42kV (for 12kV class), compliant with IEC 62271-1 |
|
Lightning Impulse Withstand Voltage |
75kV (for 12kV class), compliant with IEC 62271-1 |
|
Degree of Protection (IP Code) |
Standard IP4X (between compartments), IP3X (enclosure) |
|
Applicable Standards |
IEC 62271-200 (AC metal-enclosed switchgear and controlgear), IEC 62271-1, IEC 62271-100 |
Core Features
1. Enhanced Safety: The metal-clad structure completely isolates all live high-voltage parts. A reliable "five-prevention" mechanical interlocking system prevents misoperation, providing the highest level of operator protection.
2. High Reliability: Employs mature vacuum interruption technology; the circuit breaker features a long electrical life and is maintenance-free. All primary components undergo rigorous type testing.
3. Flexibility and Maintainability: The withdrawable circuit breaker truck design allows the breaker unit to be safely moved to the test or disconnected position while the main bus remains energized, enabling quick maintenance and testing, significantly reducing downtime.
4. Environmental Adaptability: Designed specifically for controlled indoor environments, it can withstand standard industrial temperature and humidity ranges.
5. Smart Interface: Can integrate digital protection and control devices, and provide standard communication interfaces (e.g., IEC 61850, Modbus), supporting remote monitoring and smart grid applications.
Typical Applications
This equipment is specifically designed for indoor, fixed, high-reliability, and high-safety high-voltage power distribution applications. Primary applications include:
Power Generation Sector: Auxiliary power systems and power supply centers in power plants.
Transmission and Distribution: 10kV distribution units in urban substations, industrial user substations, and data center substations.
Large-Scale Industry: Main distribution stations and the starting/control of large motors (e.g., compressors, pumps) in industries such as petrochemicals, steel, and mining.
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