The Benefits Of Using Supercapacitors For Recloser Back-Up Power

Reclosers are high-voltage circuit breakers that protect electrical grids by isolating faults and restoring power once issues are cleared. These intelligent devices can automatically test lines and reset themselves, minimizing downtime and preventing widespread outages. To function during outages, reclosers require backup power—typically supplied by batteries.

While batteries are effective, they present notable challenges. Over time, their performance degrades due to charge/discharge cycle limits and sensitivity to temperature extremes. In remote or rugged environments, replacing batteries every five years—as many manufacturers recommend—can be both costly and logistically difficult. Battery management systems are often required to monitor health and performance, adding further complexity and maintenance costs.

Supercapacitors have emerged as a compelling alternative to traditional battery backup in reclosers. Unlike batteries, supercapacitors store energy electrostatically, enabling rapid charge and discharge cycles. Their mechanical and chemical stability ensures a significantly longer lifespan, even under repeated use. Supercapacitors can also operate effectively across a broad temperature range, from -40°C to 70°C, making them ideal for harsh environments where batteries might fail.

Additional advantages include high efficiency with minimal energy loss during charging, eco-friendly disposal due to biodegradable materials, and reduced need for maintenance or replacement over time. These characteristics make supercapacitors a superior solution for utility companies seeking to enhance recloser performance and reduce operational costs.

By transitioning to supercapacitor-based backup systems, power grids can achieve greater reliability, improved safety, and lower long-term expenses. To explore available solutions, consult our supercapacitor technical guide for more details.