Is your surge protection device not working? 5 signs it needs replacement or upgrade
When a surge protection device SPD is working properly, it usually goes unnoticed. That is exactly how it should be. It quietly protects electrical systems by limiting transient overvoltage and reducing the impact of sudden voltage spikes. Over time, repeated surges, lightning activity, switching events, or ageing components can weaken that protection. When that happens, the system may no longer be as secure as it appears. The status window is showing a fault This is the clearest warning. Many SPDs use a visual status indicator, and industry sources note that green generally indicates protection is healthy, while red, fault, or end-of-life signalling indicates the unit needs attention or replacement. If the indicator changes from its normal healthy status, it is usually a sign that the protection module needs inspection or replacement. The device has taken a heavy hit A strong surge, especially after lightning activity or a serious switching event, can wea...