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ABB REB615 Busbar and Feeder Protection IED
Model: REB615
4-hour response · Pricing in SAR · Delivery across all KSA regions
REB615 — ABB REB615 Busbar and Feeder Protection IED
The ABB REB615 is a compact multi-feeder protection intelligent electronic device (IED) from the ABB Relion 615 series, providing overcurrent and earth-fault protection for LV and MV busbar systems and distribution feeders within a single 1U 19-inch rack-mount chassis. The REB615 replaces up to four individual single-function overcurrent relays with a single device, dramatically reducing panel space, wiring complexity, and CT secondary circuit connection count in new secondary substation protection panels. Each of the REB615's four protection zones provides independent three-phase overcurrent (51P), single-phase earth fault (51N/51G), and optional directional overcurrent protection (67P/67N), with independent time-current characteristic settings (definite time or IDMT inverse curves to IEC 60255-151) for each zone.
The REB615 is natively IEC 61850 compliant, supporting GOOSE messaging for inter-IED communication and MMS for substation automation system (SAS) integration with ABB MicroSCADA and third-party SCADA platforms. This allows the REB615 to participate in a full IEC 61850 process bus architecture where circuit breaker trip commands are issued via GOOSE rather than physical wiring, and protection events are automatically logged in the substation event sequence recorder. The IED also supports IEC 60870-5-103 and Modbus RTU for backward compatibility with legacy SCADA systems — a common requirement in Saudi Arabia where many existing distribution SCADA systems use Modbus or IEC 60870 protocols.
In Saudi Arabia's power distribution infrastructure, the REB615 is deployed at secondary substations serving urban residential areas, MODON industrial estates, NEOM utility network nodes, and ARAMCO compound distribution substations. The Saudi Electricity Company (SEC) engineering standard for 13.8 kV secondary substations specifies multi-function protection IEDs supporting IEC 61850 for all new substations under the Smart Grid programme — making the REB615 a compliant choice for SEC-approved protection panel designs. MARAFIQ and SWCC also specify IEC 61850 compliant protection IEDs for new utility substations at their industrial facilities in Jubail and Ras Al-Khair to integrate with their central SCADA and grid management systems.
Razz Middle East supplies and commissions ABB REB615 IEDs for secondary substation protection panels, providing protection setting calculation, IEC 61850 configuration, and SCADA integration services. Our protection engineers carry ABB Relion commissioning certification and provide site acceptance testing documentation for SEC, ARAMCO, and SABIC substation commissioning packages.
Technical Specifications
Full specifications for the REB615
- Protection Zones
- Up to 4 independent feeder zones
- Protection Functions
- 3P OC (51P), EF (51N), directional OC (67P/67N) per zone
- Time-Current Characteristic
- Definite time; IDMT (IEC/IEEE inverse curves per IEC 60255-151)
- Current Inputs
- 4 × 3-phase CT sets (12 current inputs total)
- Voltage Inputs
- 3-phase VT input (for directional function)
- Communication
- IEC 61850 (GOOSE, MMS); IEC 60870-5-103; Modbus RTU
- Mounting
- 19" 1U rack (flush or rear mounting)
- Display
- Local LED fault indication per zone
- HMI
- Front mini-HMI with push buttons
- Auxiliary Supply
- 24–250 V DC / 100–240 V AC
- Operating Temperature
- −25 to +55°C
- Standard
- IEC 60255-151 / IEC 61850 Ed.2
Key Features & Benefits
- Four independent protection zones in a single 1U 19-inch IED replace four individual single-function overcurrent relays, reducing secondary substation protection panel height, CT secondary circuit wiring, and relay test point connections by up to 75% — a significant cost saving on new secondary substation panel builds.
- Native IEC 61850 compliance (Edition 2) with GOOSE messaging for inter-IED communication and MMS for SAS integration enables the REB615 to participate in a full digital substation architecture — meeting Saudi Electricity Company (SEC) Smart Grid programme requirements for new 13.8 kV secondary substations.
- Independent IDMT time-current characteristic selection per zone (IEC Standard Inverse, Very Inverse, Extremely Inverse, and Definite Time options) allows precise grading with upstream 33 kV or 13.8 kV protection relays and downstream LV fuses, achieving full IEC 60909 selectivity at every distribution level.
- Directional overcurrent protection option (67P/67N) enables use in ring-fed distribution networks, where fault direction discrimination is required to identify which feeder segment contains the fault — a requirement for ring main unit (RMU) feeder protection in SEC urban distribution networks.
- Backward-compatible Modbus RTU and IEC 60870-5-103 communication protocols allow integration with legacy SCADA systems at existing Saudi Electricity Company, ARAMCO, and SABIC facilities that predate IEC 61850 migration, enabling REB615 installation in existing SCADA-integrated substations without SCADA system upgrade.
- Integrated event recorder and fault record storage with millisecond time-stamped event log provides the sequence-of-events data needed for post-fault analysis and SEC incident reporting — replacing the need for a separate digital fault recorder in secondary distribution substations.
- ABB SAB relay test tool compatibility and IEC 61850 COMTRADE format fault record export enables secondary injection testing and protection coordination verification using standard test equipment without requiring an ABB proprietary test interface — reducing substation commissioning test equipment cost.
Industrial Applications in Saudi Arabia
- New SEC-approved 13.8 kV secondary substation protection panels under the Saudi Electricity Company Smart Grid expansion programme, where IEC 61850 native protection IEDs are specified for all new substations feeding residential developments, NEOM utility nodes, and commercial district distribution networks.
- Industrial MCC incomer and feeder protection at MODON and SIDF industrial estates, where the REB615 four-zone architecture provides both main incomer and up to three feeder protection functions in a single panel-mounted IED — replacing multiple single-function relays in the MCC protection panel.
- MARAFIQ and SWCC secondary substation protection at industrial utility facilities in Jubail Industrial City, where IEC 61850 GOOSE communication between protection IEDs enables automatic bus coupler operation following incomer protection trip — maintaining supply to healthy bus sections.
- Ring main unit feeder protection at SEC urban distribution network RMUs, where the REB615 directional overcurrent option (67P/67N) enables the protection system to identify which ring segment contains the fault and isolate it, automatically restoring supply to healthy ring segments within the SAIDI improvement targets set by ECRA.
- ARAMCO compound distribution substation protection at residential, administrative, and industrial compound substations, where ABB Relion IEDs are specified for IEC 61850 integration with the ARAMCO Distribution Automation System (DAS) central control system in Dhahran.
- Secondary protection IED retrofit for aging electromechanical relay protection panels at existing SEC substations under the SCADA Upgrade Programme, where the REB615 IEC 61850 interface enables integration with the new MicroSCADA-based substation control system while the IED's physical current transformer connections remain unchanged.
- Protection relay for NEOM utility infrastructure secondary substations, where the project's commitment to a fully digitalised power system requires IEC 61850 Edition 2 GOOSE and Sampled Values capability from all protection IEDs — a capability the REB615 provides natively with no additional hardware.
Industrial Supplier in Saudi Arabia
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Frequently Asked Questions — REB615
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