Valve Regulated Lead Acid Battery Design Life. Battery Life or “design life” of a battery is based on average use at room temperature (20-25°C) operation. For a modest UPS System, the design life is typically 5 years. Since, UPS applications are standby applications, the batteries are float charged, and the life is also referred to […]
BS7671:2018 18th Edition Wiring Regulations now makes mandatory RCD protection on circuits up to 32A. Isolation transformers will negate the effectiveness of RCD protection. Is this a problem? Tony Bell explains.