ABB OEM Vacuum Recloser for Distribution Networks

The ABB OEM is a pole-mounted three-phase vacuum recloser for medium-voltage overhead distribution automation, designed to reduce customer outage duration by automatically isolating permanent faults from transient faults and restoring supply to the healthy portions of the feeder without dispatcher intervention. Rated at 15 kV and 27 kV system voltages with continuous current ratings of 400 A and 630 A and interrupting capabilities from 8 kA to 12 kA, the OEM recloser handles the fault levels and load currents encountered in Saudi Arabia's secondary distribution networks fed from 33/11 kV substations. The vacuum interrupter technology eliminates the SF6 gas, oil, or air blast media used in older recloser designs, requiring no periodic refill or maintenance of the interrupting medium — a significant operational advantage for Saudi Electricity Company (SEC) distribution maintenance teams managing thousands of line kilometres across the Kingdom.

The automation intelligence of the OEM recloser resides in its integrated control unit, which supports adaptive protection schemes including instantaneous trip followed by time-delayed reclose cycles (typically 3 reclose attempts), directional overcurrent and earth fault protection, and under/over voltage/frequency protection. Communication via DNP3 and IEC 61850 GOOSE messaging enables the control unit to participate in substation automation architectures and feeder automation schemes, allowing a SCADA-controlled sectionalising strategy where multiple reclosers and line switches coordinate to automatically restore supply to the maximum feeder section after a permanent fault is isolated. This automation reduces SAIDI (System Average Interruption Duration Index) and SAIFI (System Average Interruption Frequency Index) metrics — the key performance indicators against which SEC measures distribution reliability under the ECRA (Electricity and Cogeneration Regulatory Authority) regulatory framework.

Saudi Arabia's distribution network modernisation program, driven by SEC's Vision 2030 grid reliability targets and ECRA's distribution reliability benchmarks, has created significant demand for modern reclosers to replace aging electromechanical sectionalising equipment on 11 kV and 33 kV feeders across all five SEC regions. Rural and semi-urban feeders in the Central, Western, and Southern regions experience higher-than-average fault rates due to vegetation encroachment and lightning exposure, making automated reclosing and sectionalising essential for maintaining acceptable reliability levels without prohibitive inspection and repair costs. NEOM's primary distribution network specifies IEC 61850-compatible reclosers for its fault-tolerant loop distribution architecture, and the PIF (Public Investment Fund) infrastructure projects include distribution automation as a key component of their utility infrastructure specifications.

Razz Middle East works with ABB to coordinate OEM recloser supply for SEC distribution projects, private utility infrastructure, and industrial network automation across Saudi Arabia. We provide technical assistance for protection coordination studies, DNP3/IEC 61850 communication configuration, and integration with existing SCADA platforms, with project-specific pricing in SAR and in-kingdom technical support for commissioning and testing.