Hong Kong's commercial buildings are packed with lifts, central air-conditioning, server rooms, fire services, and telecommunications systems — all highly sensitive to voltage fluctuations. When thunderstorm season hits, transient overvoltages caused by lightning strikes or switching operations can quietly travel through power lines and enter a building's electrical distribution system. The result? Equipment failure, data loss, or even a full-floor blackout. Installing a proper Surge Protection Device (SPD) at the main distribution board is the first line of defence.
Surge Protector SPD Type 2 SPD Transient Overvoltage Citel
Type 2 SPDs are typically installed at the main or sub-distribution board to discharge surge currents induced by lightning or switching operations. Take Citel's Type 2 range as an example — its total maximum discharge current reaches 160 kA, effectively clamping surge voltages to levels that downstream equipment can safely withstand. Think of it as a floodgate for your building's electrical system: it diverts dangerous energy away before it ever reaches your equipment.
Citel's Type 2 SPD series has been adopted across numerous commercial buildings, data centres, and public facilities in Hong Kong. Its high discharge capacity and consistent performance are well suited to the city's high-density built environment and frequent thunderstorms. Whether for new developments or building retrofits, adding a Type 2 SPD at the main distribution board is one of the most cost-effective ways to strengthen a building's electrical reliability.
