SPB 0,500/10/DT - Surge arrester - 90210/DT

SPB */10 DT ** - surge arrester for flat busbars for distribution cabinets compliant with ČSN EN 61643‑11 ed.2: 2013 with a rated discharge current of 10 kA and the highest continuous operating voltage Uc = 280 V, 440 V, 500 V and 660 V. It provides protection against low-voltage overvoltages; in low-voltage overhead distribution networks, it protects electrical devices, instruments, distribution transformer cabinets, and reduces the risk of damage to home networks and connected devices due to atmospheric and switching overvoltages, in AC networks with a frequency of 48 to 62 Hz. SPB surge arresters protect against the destructive effects of electrical discharges and switching overvoltages. They are recommended for use in locations protected against direct contact, e.g., by location or barrier protection. SPBs require no maintenance; a visual inspection after lightning storms is sufficient. Damage to the arrester due to a large overvoltage is indicated by the opening of a red cover at the bottom of the housing. Because excessive overloading of the arrester, exceeding guaranteed limits and resulting in thermal breakdown, will not result in its destruction, this arrester can be mounted in distribution boards, directly on the busbars of the power switch.