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3KD Switch-disconnectors, 3KC Power Switches
Switch-disconnectors and power switches are essential components in industrial electrical systems for safe isolation and load switching. The 3KD series of switch-disconnectors and the 3KC series of power switches are designed for applications requiring reliable disconnection under load or no-load conditions. These devices are available in variou...
Switch-disconnectors and power switches are essential components in industrial electrical systems for safe isolation and load switching. The 3KD series of switch-disconnectors and the 3KC series of power switches are designed for applications requiring reliable disconnection under load or no-load conditions. These devices are available in various configurations, including 3-pole (3P) and 4-pole (4P) versions, with rated operational currents ranging from 16 A to 3150 A, depending on the model. They feature high short-circuit withstand capacities, typically up to 50 kA, and are suitable for AC and DC applications with voltages up to 1000 V AC and 1500 V DC. The switches offer robust mechanical endurance, often exceeding 10,000 operations, and are equipped with optional accessories such as auxiliary contacts, shunt trips, and undervoltage releases. Their compact design allows for panel mounting or enclosure integration, with IP20 protection for the terminals and IP65 for the front plate in some variants. The 3KD and 3KC series comply with international standards like IEC 60947-3 and UL 98, ensuring global acceptance.
These switch-disconnectors and power switches are deployed in a wide range of industrial sectors, including manufacturing, energy distribution, and infrastructure. They are commonly installed in main distribution boards, motor control centers, and power supply units for machinery. In renewable energy systems, such as photovoltaic plants and wind turbines, they provide safe isolation for inverters and transformers. The devices are also used in commercial buildings for HVAC systems, elevators, and lighting control panels. Their ability to handle high inrush currents makes them ideal for transformer and capacitor bank switching. In process industries like chemical, petrochemical, and water treatment, they ensure safe maintenance and emergency shutdown procedures. The robust construction allows operation in harsh environments with ambient temperatures from -25°C to +55°C.
The main subcategories within this category include the 3KD switch-disconnectors and 3KC power switches. The 3KD series covers models like 3KD1, 3KD2, and 3KD3, with rated currents from 16 A to 3150 A. The 3KC series includes 3KC0, 3KC1, and 3KC2, designed for higher power applications up to 3150 A. Key article codes follow a pattern: for example, 3KD1 630-1 (630 A, 3P) or 3KC2 1600-1 (1600 A, 4P). The codes typically include the series prefix, current rating, number of poles, and optional accessories suffix. Other relevant articles include the 3KD1 250-1 (250 A) and 3KC1 800-1 (800 A). These switches are available with rotary handles, door interlocking mechanisms, and padlockable options for enhanced safety.
At Electric Automation Network, we offer the complete range of 3KD and 3KC switches with real-time pricing and stock availability. Our engineering team provides personalized technical support to help you select the right device for your application, including coordination studies and accessory recommendations. We ensure express worldwide shipping, with most orders dispatched within 24 hours. Each product listing includes detailed technical documentation, such as dimension drawings, wiring diagrams, and performance curves. Our multilingual portal allows you to access information in your preferred language, simplifying procurement across global operations.
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