Isolator switch 3P 250A HA354

Isolating switch – reliable power disconnection

This three-pole isolating switch with a rated current of 250A is a robust solution for safely disconnecting electrical circuits. It is suitable for both industrial installations and public buildings where high reliability and operational certainty are required. The device's design, intended for permanent mounting, ensures stability and long-term operation.

Functionality and application

The HA354 switch is designed to operate in 380-415V AC systems and offers a wide range of applications. As a safety, main and maintenance switch, it allows for safe performance of maintenance work and isolation of damaged parts of the installation. Thanks to its high short-circuit breaking capacity (9 kA) and rated continuous current (250A), it provides effective protection against overloads and short circuits. The possibility of mounting on a plate or in distribution boards increases installation flexibility.

Key features and benefits

• High switching capacity: Rated operating power at 400V AC is as high as 164 kW, allowing it to handle demanding loads.
• Safe operation: It has a locking mechanism that prevents accidental switching on during maintenance work.
• Durable construction: The device is made of high-quality materials, guaranteeing long life and resistance to environmental conditions.
• Easy installation: Designed for connection of cables up to 150 mm² in cross-section, which facilitates integration with existing electrical infrastructure.
• Versatility: Can be used as a main, safety or maintenance switch – one device performs many functions.
• Long rotating lever: Enables convenient and reliable operation of the switch even in difficult conditions.
• Compliance with standards: Ensures safe and compliant operation of the electrical installation.

Technical parameters in practice

Rated continuous current of 250A means that the switch will easily handle most standard loads in commercial and industrial buildings. Short-circuit breaking capacity at 9 kA guarantees effective protection against the effects of sudden voltage surges. The high rated impulse withstand voltage (8000 V) ensures resistance to disturbances in the electrical network. This ensures stable and reliable operation of the device for a long time. Additionally, the lack of need for additional auxiliary contacts (number of auxiliary contacts normally open/closed/changeover is 0) simplifies installation and reduces costs.