Overcharged battery in non-ventilated box lead to explosion of remote terminal unit panel

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Alert ID: 
Description of Process: 

Explosion of a Remote Terminal Unit (RTU) panel.

Description of Incident: 

A Remote Terminal Unit (RTU) panel exploded. Projectiles from the components landed over 40 feet away. There were no injuries and no damage to nearby equipment.

Good Practice Guidance: 

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Causes and consequences of incident or accident: 
Fire or explosion