Balancing Isolation and Conduction: Technical Analysis of REPSUN Equipotential Connector with Isolating Spark Gap Technology (REP-ISG100)

1.The Hidden Risk of “High-Potential Back strike” in Multi-Grounding Systems

  In lightning protection engineering, the moment which a lightning current dissipates into the ground, intense transient potential differences arise between various grounding systems. Modern buildings and industrial facilities often equipped with multiple independent grounding systems—including power protection grounds, direct lightning grounds, and equipment signal grounds. Under lightning impulse conditions, potential imbalance readily occurs between these mutually isolated metal components and busbars.

  Once a high-potential back flashover occurs, the consequences can range from the breakdown of sensitive electronic equipment to the ignition of flammable or explosive substances, potentially leading to system failures or even major safety incidents.、

  Compliant with IEC 62561-3:2023— Part 3: Requirements for Isolated Spark Gaps (ISG), electrically separated metal objects must be bonded to the lightning protection system via conductors or surge protective devices to mitigate potential differences. However, traditional permanent conductive connections keep these grounding systems interconnected year-round, inevitably introducing power-frequency interference that disrupts normal equipment operation.

2. The Innovative Solution: REPSUN Equipotential Connector(REP-ISG100)
  Developed specifically to address these challenges, REPSUN Equipotential Connector with isolating spark gap technology (REP-ISG100) is a professional protective device. It employs high-quality switching components with rapid response and leverages mature isolated spark gap technology to perfectly balance the dual requirements of “normal isolation” and “lightning-induced conduction.”

  The ISG equipotential connector(REP-ISG100) can be flexibly installed between two grounding busbars or two grounding equipment, making it suitable for both indoor and outdoor applications. Under normal conditions, REPSUN ISG equipotential connector maintains electrical isolation, effectively blocking power-frequency interference between different grounding systems (e.g., power ground, signal ground, lightning protection ground). When a lightning overvoltage strikes, REPSUN equipotential connector will conduct within nanoseconds, instantly achieving equipotential equalization and precisely meeting the stringent requirements for LEB (Local Equipotential Bonding).

  Fully compliant with the technical requirements for isolated spark gaps specified in IEC 62561-3:2023, REPSUN equipotential connector with isolating spark gap technology provides a reliable equipotential equalization solution for scenarios involving multiple coexisting grounding grids. It effectively mitigates the risk of high-potential backstrike and stands as a preferred component for lightning protection projects in critical facilities such as communication hubs, oil and gas stations, data centers, and power installations.