NOARK Ex9UE 230V Type 2 Surge Protection Device

The NOARK Ex9UE 230V Type 2 Surge Protection Device (model 131201) is an IEC 61643-11 and EN 61643-11 compliant surge arrester providing Type 2 transient overvoltage protection for 230/400 V TT and TN-S distribution systems. Engineered at NOARK's R&D facility in Brno, Czech Republic, the Ex9UE is rated at a maximum continuous operating voltage (Uc) of 275 V AC and provides an impulse current (Iimp) capability of 40 kA (8/20 µs waveform), with a voltage protection level (Up) of ≤1.5 kV — values that position it for installation in main distribution boards and sub-distribution panels as the second line of surge defence downstream of Type 1 or Type 1+2 lightning current arresters at the building's main service entry. The DIN-rail mounted design occupies 2 module (36 mm) widths per phase and integrates a thermal disconnector that disconnects a failed MOV element safely without operating the upstream fuse or circuit breaker, maintaining supply continuity to the load while indicating device end-of-life through a red window flag.

Saudi Arabia's electrical infrastructure faces significant surge overvoltage threats from multiple sources: direct lightning strikes to the exposed overhead SEC distribution networks that supply many industrial and commercial facilities outside urban centres; switching transients generated by the capacitor bank switching, transformer energisation, and large motor starting operations that are frequent in ARAMCO, SABIC, and SWCC facilities; and the increasing prevalence of photovoltaic systems — driven by Saudi Arabia's Vision 2030 renewable energy targets — which introduce additional surge injection paths through the inverter DC bus and AC output circuits. The NOARK Ex9UE Type 2 addresses the switching transient and induced lightning surge threat at the distribution panel level, protecting sensitive electronic equipment including variable-speed drives, PLC control panels, server infrastructure, building management systems, and modern LED driver supplies that are vulnerable to even sub-kilovolt overvoltage spikes that do not trigger a circuit breaker but progressively degrade semiconductor junctions.

The Saudi Vision 2030 smart infrastructure programme — including the smart city platforms for NEOM's Sindalah Island, the King Abdulaziz City for Science and Technology (KACST) technology campus expansions, the expanding NWC SCADA infrastructure for water distribution network monitoring, and Qiddiya's entertainment city building management systems — creates substantial demand for reliable surge protection in the distribution panels serving sensitive electronic systems. ARAMCO's process control infrastructure across the Eastern Province uses distributed PLC and DCS systems that are highly vulnerable to surge events propagated from outdoor field cabling, and SEC's ongoing programme of installing electronic smart meters and remote monitoring equipment on its distribution network requires surge protection in the distribution panels housing these devices. The NOARK Ex9UE's Czech R&D design heritage ensures the MOV element specification, thermal disconnector design, and enclosure construction meet the European quality standards that ARAMCO and SABIC instrument engineers specify for electronic system protection components. Razz Middle East offers the Ex9UE as part of a coordinated surge protection package with Type 1 devices for the service entry and Type 3 devices for sensitive equipment panels.

Razz Middle East maintains local stock of Ex9UE surge protection devices in Saudi Arabia and provides surge co-ordination design services — selecting the correct protection level, energy co-ordination between Type 1, Type 2, and Type 3 devices, and cable separation requirements — in accordance with IEC 62305 and Saudi SEC distribution network specifications. We supply Arabic-language installation guides and conformity documentation for SEC and SASO building electrical approval submissions, and our engineers can conduct on-site surge protection audits at ARAMCO, SABIC, and NWC facilities to identify unprotected panels in existing installations.