Surge Arrester Apator ASA 500-5BO+K with Disconnector, model 63-823219-021

Apator ASA 500-5BO+K with integrated disconnector (model 63-823219-021) is a surge arrester designed to protect low-voltage electrical installations from transient overvoltages. It is intended for installation in distribution boards and electrical panels in industrial, commercial and residential environments. The device combines multi-stage overvoltage suppression with a mechanical disconnector that isolates the unit after a severe surge event to allow safe inspection and replacement.

Advantages

The unit provides reliable transient overvoltage protection for TN and TT system configurations and reduces the risk of damage to sensitive equipment. Its integrated mechanical disconnector offers a visible and secure way to remove the device from the circuit after operation, improving maintenance safety. Compact dimensions and DIN-rail compatibility simplify installation in standard distribution boards, while the device’s construction is suited for continuous operation in low-voltage networks.

Suitable for

• Protection of distribution boards in residential buildings
• Surge protection in commercial and light industrial electrical panels
• Safeguarding sensitive electronic equipment and control circuits
• Use in TN and TT earthing systems within low-voltage networks

Key specifications

• Type: Surge arrester with integrated mechanical disconnector
• Application: Transient overvoltage suppression for low-voltage networks
• Mounting: DIN-rail compatible for installation in distribution panels
• Operation: Multi-stage surge protection elements with automatic response to overvoltage
• Disconnector: Mechanical isolation after operation for safe removal and replacement
• Environment: Suitable for residential, commercial and light industrial installations

How to use

Install the surge arrester in the distribution board on a standard DIN rail according to local wiring regulations and the panel layout. Connect the device in the appropriate phase and neutral/earth points as required for the system configuration. After a significant surge event, the integrated disconnector will operate and visibly indicate the device has been taken out of service; at that point, isolate the distribution board supply before removing or replacing the arrester. Commissioning and maintenance should be carried out by a qualified electrician.

Usage recommendations

Verify compatibility with the building earthing system (TN/TT) and ensure coordination with upstream and downstream protective devices. Regularly inspect the visual status indicator and replace the unit after disconnector activation or if any signs of damage are present.