Description
1. Product Overview
ABB REC650 (Full Order Code: 1MRK008514-CB) is a new-generation high-performance integrated bay control and protection IED within the ABB Relion® 650 series. Custom-designed for 110kV/220kV high-voltage substations, renewable energy step-up substations and large industrial captive power plants, it focuses on precise measurement & control, safety interlocking, high-precision synchronisation, equipment condition monitoring and coordinated automation control for high-voltage bays.
As a general high-spec finalized variant in the industry, the CB version features optimised compatibility with LPCT low-power current transformers, wider power supply adaptability, redundant I/O logic configuration and upgraded hardware electromagnetic interference resistance compared with the AA variant of the same series. It is better suited to complex high-voltage power grids in China, power grids with high penetration of renewable energy and harsh industrial environments with strong electromagnetic fields.
The IED integrates all-in-one functions including comprehensive electrical quantity measurement & control for high-voltage bays, intelligent management of circuit breakers, disconnectors and earthing switches, high-precision synchronisation paralleling, five-prevention logic interlocking, auxiliary abnormal protection, full-range equipment self-supervision and high-speed substation-wide data exchange. It independently fulfils all secondary measurement, control and supervision tasks for high-voltage incoming, outgoing, bus coupler, bus section, PT and station service transformer bays.
Its hardware architecture fully complies with technical specifications for high-voltage intelligent substations issued by State Grid and China Southern Power Grid. Supporting a hierarchical distributed automation architecture, it seamlessly connects with various SCADA systems, dispatch master stations, protection information sub-stations and intelligent terminals. It fits engineering scenarios including new-build high-voltage substation deployment, intelligent retrofits of legacy high-voltage bays and substation automation system upgrading.
Adopting ABB industrial modular pluggable hardware architecture, the device is equipped with high-precision synchronous sampling chips, independent synchronisation operation units and redundant logic processing modules. It complies strictly with international IEC and EN power standards and holds IEC 61508 SIL 3 functional safety certification, full IEC 61850 Ed2 protocol certification and top-grade industrial EMC certification. It delivers outstanding advantages including high computation accuracy, flexible logic configuration, zero long-term parameter drift, robust power supply tolerance and maintenance-free stable operation. It can withstand long-term harsh operating conditions in high-voltage substations characterised by intensive electromagnetic radiation, transient grid disturbances and frequent load fluctuations, meeting requirements for long-term reliable operation of unattended intelligent substations.
2. Technical Features
2.1 Integrated Comprehensive Control for High-Voltage Bays Adaptable to All Primary Connection Schemes
Developed specifically for high-voltage bay applications, the IED integrates a full chain of functions: electrical quantity measurement, sequential operation of switchgear, fault and anomaly monitoring, auxiliary protection, safety interlocking, synchronisation grid connection, event tracing and equipment self-supervision. It supports one-stop single-step operation and sequential automatic control of high-voltage circuit breakers, disconnectors and earthing switches.
Embedded dedicated control logic fits mainstream high-voltage primary connection schemes such as single busbar, double busbar, double busbar with section and bridge connection. It effectively avoids safety hazards including false closing, incorrect interlocking and misoperation under load within high-voltage bays, and fully covers operation, maintenance, grid connection and switching conditions of high-voltage substations.
2.2 Dual Transformer Mode with Excellent Sampling Compatibility
The sampling circuit is specially optimised for the 1MRK008514-CB variant, supporting both conventional electromagnetic CT/PT and LPCT low-power instrument transformers. It adapts to process bus sampling architectures of new-generation intelligent substations as well as retrofit projects of traditional conventional substations.
Equipped with multi-stage adaptive anti-interference filtering algorithms, it effectively eliminates sampling errors caused by high-voltage grid harmonics, transient surges and electromagnetic disturbances, ensuring accurate and stable electrical sampling under all operating conditions and resolving sampling distortion induced by renewable energy grid connection and industrial impact loads.
2.3 High-Precision Intelligent Synchronisation for Safe Grid Connection
Fitted with an independent hardware synchronisation operation unit, it supports multiple logic modes: automatic exact synchronisation, manual synchronisation, dead-line closing, synchronism-check paralleling and no-voltage & no-current closing. It accurately discriminates voltage amplitude difference, frequency difference and phase angle difference within millisecond timescale, with phase control error for closing ≤0.5°.
Multi-stage interlock logic is configured for high-risk scenarios including high-voltage busbar paralleling, tie-line grid connection, captive power plant grid connection, standby power transfer and renewable energy step-up substation grid connection. It thoroughly prevents grid surges, equipment damage and system oscillation caused by non-synchronous paralleling and fully satisfies safety specifications for high-voltage grid connection.
2.4 Multi-Level Five-Prevention Interlocking to Eliminate High-Voltage Electrical Misoperation
A three-tier interlock protection system covering equipment level, bay level and substation-wide level is implemented. It supports dual interlocking comprising hard-wired electrical interlocks and software logic interlocks among circuit breakers, disconnectors and earthing switches. Customisable cross-bay linkage logic, maintenance-state interlock, fault lockout and local/remote authority interlock are available.
It strictly complies with industrial five-prevention safety standards for high-voltage systems. Hardware and software safeguards eliminate typical high-voltage misoperations such as switching disconnectors under load, earthing live circuits, closing with earthing switches closed and incorrect circuit breaker operation. It supports safe operation of both manned and unattended substations.
2.5 Wide-Range Industrial Power Supply with Superior Condition Tolerance
The CB version adopts a dedicated wide-range adaptive power module, supporting universal AC/DC supply: DC 88–265 V / AC 100–240 V. It withstands ±20% rated voltage fluctuation and features capacity for bridging power outages shorter than 50 ms to resist transient surges, voltage dips and instantaneous disturbances in high-voltage grids.
Built-in multi-protection circuits against overvoltage, overcurrent, electrostatic discharge and surges deliver low temperature rise, low power consumption and no operational parameter drift. The device maintains continuous operation without restart or data loss under extreme grid conditions, offering superior power supply stability compared with conventional measurement and control devices.
2.6 Expandable Large-Capacity I/O with Flexible Logic Configuration
Multiple high-withstand galvanically isolated digital input channels and high-power relay output channels are provided. Sufficient and expandable I/O resources fully satisfy requirements for equipment status acquisition, control output, cross-device linkage, alarm output and interlock blocking within high-voltage bays.
All I/O ports feature anti-false triggering design, strong anti-electromagnetic interference and surge resistance to adapt to intensive electromagnetic environments in high-voltage switchyards. Users can customise function block and ladder diagram logic configurations to flexibly accommodate complex primary connection schemes and customised operation logic.
2.7 High-Speed Redundant Communication with Full Protocol Support for Stable Substation Networking
Dual Gigabit Ethernet redundant communication interfaces are standard. The device fully supports mainstream power protocols: IEC 61850 Ed2 (MMS/GOOSE/SV), IEEE 1588 PTP precision time synchronisation, IEC 60870-5-101/103/104, Modbus RTU/TCP and DNP3.
It supports dual redundant networking, process bus SV sampling networking and substation-wide peer-to-peer GOOSE linkage networking with low communication latency and robust link self-recovery capability. It seamlessly integrates into intelligent substation architectures to realise millisecond-level upload of four-remote data, equipment status, synchronisation records, operation logs and fault events, as well as remote commissioning and diagnosis.
2.8 Full-Range Self-Supervision and Traceability for Excellent Compliance and Maintainability
Equipped with a high-resolution Chinese local HMI, it supports on-site parameter setting, real-time status monitoring, equipment status query, event browsing, loop commissioning and setting verification.
An integrated 24/7 hardware & software self-supervision system continuously monitors power modules, sampling circuits, I/O ports, communication links and program operation. Local and remote dual alarms are triggered upon abnormalities. Long-term non-volatile storage retains full-lifecycle data including SOE records, operation logs, status change records, fault alarms and synchronisation records, fully meeting standard requirements for substation acceptance, compliance filing, fault tracing and condition-based maintenance.
3. Technical Specifications
3.1 Basic Specifications
Model: REC650 Full Order Code: 1MRK008514-CB Brand: ABB Series: Relion® 650 Series High-Spec Bay Control & Protection IED for High-Voltage Applications Device Type: Bay-level integrated measurement, control and protection IED for high-voltage substations Core Positioning: Comprehensive electrical measurement & control of high-voltage bays, sequential control of switchgear, high-precision synchronisation, substation-wide five-prevention interlocking, redundant high-speed communication, full-process status and fault tracing Application Scope: All bays, bus coupler and section bays in 110kV/220kV substations; renewable energy step-up substations; industrial captive high-voltage power plants; railway high-voltage power supply systems; intelligent retrofits of legacy high-voltage bays Hardware Characteristics: Dual sampling support for LPCT and conventional CT, wide-range AC/DC power supply, redundant logic processing, expandable large-capacity I/O, dual redundant communication, high-grade EMC immunity Core Advantages: Wide operating condition adaptability, high sampling accuracy, stable and safe grid connection, rigorous interlock logic, robust power supply tolerance, convenient maintenance, zero long-term drift
3.2 Control and Auxiliary Protection Specifications
Core Control Functions: Local and remote control of high-voltage circuit breakers/disconnectors/earthing switches, sequential automatic operation, automatic exact synchronisation, dead-line closing, synchronism-check paralleling, automatic standby power transfer, hierarchical authority interlock, cross-bay coordinated control Auxiliary Protection Functions: Overvoltage/undervoltage protection, overfrequency/underfrequency protection, overload alarm, three-phase unbalance monitoring, trip circuit supervision, abnormal switch position alarm, equipment fault lockout, circuit anomaly supervision Operation Logic: Single-step manual operation, batch sequential operation, mandatory interlock under maintenance mode, fault lockout, illegal operation blocking Synchronisation Accuracy: Precise discrimination of voltage, frequency and phase angle differences; phase error for closing ≤0.5°, shock-free and oscillation-free paralleling Fault Tolerance: Adaptive to high-voltage grid disturbances, abrupt load changes and renewable energy fluctuation to prevent misoperation, false synchronisation and incorrect linkage
3.3 Measurement Accuracy Specifications
Measured Quantities: Three-phase phase voltages, three-phase line voltages, three-phase currents, active/reactive/apparent power, power factor, system frequency, phase angles, three-phase unbalance factor, bidirectional energy accumulation, operating extreme value statistics, load trend recording Measurement Accuracy: Current and voltage ≤±1.0%; power and energy ≤±1.5%; frequency ≤±0.005 Hz; phase angle ≤0.1° Sampling Mode: Adaptive dual-mode sampling supporting conventional electromagnetic transformers and LPCT low-power transformers, equipped with multi-stage anti-harmonic and anti-interference filtering algorithms Data Statistics: Time-of-use energy accumulation, load curve storage, persistent recording of abnormal data, automatic analysis of operating trends
3.4 Communication and Interface Specifications
Communication Protocols: IEC 61850 Ed2 (MMS/GOOSE/SV), IEEE 1588 PTP precision time synchronisation, IEC 60870-5-101/103/104, Modbus RTU/TCP, DNP3 Hardware Interfaces: Dual Gigabit Ethernet redundant ports, extended RS485/RS232 serial interfaces, dedicated local service debugging port Network Topologies: Dual redundant network, process bus SV networking, substation-wide peer-to-peer GOOSE networking, bus networking, compatible with new and legacy intelligent substation architectures Data Transmission: Real-time upload of four-remote data, equipment status, synchronisation records, operation logs and alarms; remote reception of remote control, remote adjustment and parameter setting commands; millisecond-level push of fault event messages Commissioning Functions: Online logic configuration, parameter modification, setting verification, waveform data export, remote fault diagnosis
3.5 Power Supply Specifications
Operating Power Supply: Wide-range universal industrial AC/DC power supply Input Range: DC 88–265 V / AC 100–240 V, withstand ±20% rated voltage fluctuation Power Failure Ride-Through: Bridge capacity for power outages shorter than 50 ms; no restart or data loss during instantaneous power interruptions Power Circuit Features: Built-in surge, ESD, overvoltage, overcurrent and transient disturbance suppression circuits, suitable for complex electrical environments in high-voltage substations Typical Power Consumption: 32 W; low temperature rise without performance drift during long-term operation Supply Stability: Continuous stable operation of device functions, communication and logic under voltage dips, surge impacts and short-term grid disturbances
3.6 I/O and Interlock Control Specifications
Digital Inputs: Multiple passive galvanically isolated high-withstand DI channels collecting circuit breaker position, disconnector position, earthing switch position, spring charged status, local/remote selector, maintenance switch, equipment alarms, interlock status and other bay signals Digital Outputs: Multiple high-power relay DO channels for circuit breaker trip/close driving, interlock linkage output, alarm output and automatic control logic output Interlock Mechanisms: Equipment electrical interlock, software logic interlock, cross-bay linkage interlock, mandatory five-prevention interlock, hierarchical operation authority interlock I/O Characteristics: Galvanic isolation on all ports, anti-false triggering, strong anti-electromagnetic interference and surge resistance, adapted to severe electromagnetic environments of high-voltage switchyards Logic Expansion: User-configurable function block and ladder diagram logic, flexible for various high-voltage primary connection schemes and custom operation logic
3.7 Environmental Specifications
Operating Temperature: -25℃ ~ +55℃ Storage Temperature: -40℃ ~ +85℃ Operating Humidity: 5%～95%RH (non-condensing, no corrosive gas) Electromagnetic Compatibility: Complies with top-grade IEC 61000 industrial EMC standards; resistant to intensive electromagnetic radiation, high-frequency harmonics, electrostatic discharge and surge disturbances Mounting Type: Standard embedded mounting for 19-inch cubicles Device Weight: Approx. 3.0 kg Operation Mode: Unattended continuous stable 7×24-hour operation all year round Compliance Standards: Fully meets technical specifications and acceptance criteria for secondary equipment of high-voltage substations issued by State Grid and China Southern Power Grid
4. Operating Principle
The ABB REC650 (1MRK008514-CB) high-voltage bay control and protection IED adopts an industrial high-performance main controller as its core. It integrates dual-mode sampling units, independent high-precision synchronisation operation modules, multi-level interlock logic processing units and dual-redundancy high-speed communication units. Leveraging dedicated high-voltage control algorithms, five-prevention interlock mechanisms, adaptive sampling filtering technology and substation-wide high-speed data interaction architecture, it achieves fully automatic integrated functions including measurement & control, intelligent control, synchronisation grid connection, safety interlocking, status monitoring and fault tracing for high-voltage bays.
Upon power-on, the device automatically executes comprehensive hardware self-test, sampling circuit calibration, I/O initialisation, communication protocol matching and loading of interlock and synchronisation logic. It rapidly enters standby status to guarantee fault-free startup and coordinated stable operation of all functional modules.
During normal operation, it adaptively switches between conventional CT and LPCT sampling modes. High-speed synchronous sampling continuously captures core electrical parameters such as three-phase voltages, currents, frequency and phase angles of the high-voltage bay. Multi-stage anti-interference filtering algorithms accurately calculate operating parameters including power, energy and unbalance factor to complete full-range electrical monitoring and energy statistics. Meanwhile, the device continuously acquires all bay signals including switch positions, spring charging status, operation authority, maintenance status and equipment alarms, and updates bay operating conditions in real time.
The local HMI intuitively displays real-time data, equipment status, operation records and alarms to facilitate on-site commissioning, setting verification and field operation. Via dual redundant high-speed communication links, four-remote data, synchronisation records, operation logs and equipment status are uploaded to the substation automation SCADA and dispatch master stations in real time, enabling comprehensive digitalised, visualised and intelligent management of high-voltage bays.
Under operating conditions such as busbar paralleling, line grid connection, standby power transfer and sequential switch operation, the device automatically activates high-precision synchronisation logic. It accurately compares voltage, frequency and phase angle differences on both sides. Closing commands are issued automatically when grid connection conditions are satisfied; operations are strictly blocked if conditions are not met, completely eliminating risks of non-synchronous paralleling.
At the same time, three-tier five-prevention interlock logic runs continuously to verify operation authority, equipment status and operating modes. Mandatory blocking is triggered against illegal operations, equipment anomalies and fault conditions to fundamentally prevent high-voltage electrical misoperation accidents. When anomalies such as voltage/frequency out-of-limits, overload and abnormal equipment status occur in the bay, the device automatically activates alarm and lockout logic and persistently stores SOE events, fault records and status change information, providing accurate reference for fault review, hidden danger investigation and setting optimisation.
During daily operation and maintenance, the device supports local manual operation, remote circuit breaker control, sequential automatic operation, online parameter setting and logic commissioning. Relying on 24/7 full-range hardware and software self-supervision, it monitors the operating status of hardware modules, sampling circuits, I/O ports and communication links, actively reporting various hidden anomalies to comprehensively ensure safe, standardised, stable and long-term unattended operation of high-voltage substation bay equipment.
5. Application Scenarios
5.1 Comprehensive Measurement & Control for All Bays in 110kV/220kV High-Voltage Substations
Widely applied to incoming, outgoing, bus coupler, bus section, PT and station service transformer bays in high-voltage substations. It undertakes core functions including full electrical quantity measurement, intelligent switchgear control, status monitoring, abnormal alarm, data upload and logic interlocking. As standard core bay-level equipment for high-voltage intelligent substations, it satisfies refined, intelligent and compliant operation requirements of high-voltage power grids.
5.2 High-Voltage Grid Connection for Renewable Energy Step-Up Substations
Aiming at characteristics of photovoltaic and wind power step-up substations including large power flow fluctuation, strong harmonic interference and complex grid connection conditions, it delivers precise dual-mode sampling, adaptive condition discrimination, high-precision synchronisation and stable interlock logic. It ensures safe grid connection, smooth switching and disturbance-free paralleling on the high-voltage side of renewable energy plants and effectively resolves grid disturbances, sampling distortion and unstable grid connection caused by renewable integration.
5.3 High-Voltage Busbar Paralleling and Power Transfer Scenarios
Suitable for high-reliability applications including high-voltage bus coupler paralleling, tie-line grid connection, captive power plant grid connection and dual-power automatic transfer. With millisecond-level high-precision synchronisation discrimination and rigorous interlock logic, it enables shock-free and oscillation-free safe paralleling of high-voltage systems and significantly improves grid stability and power supply reliability.
5.4 Five-Prevention Safety Management in High-Voltage Substations
Based on a three-tier hardware and software interlock system, it implements full-process five-prevention control for high-voltage switchgear operations and eliminates all types of high-voltage electrical misoperations. Fully compliant with power industry five-prevention safety specifications, it applies to safety operation of unattended, manned and centralised control high-voltage substations.
5.5 Premium High-Voltage Power Distribution for Industrial Projects
Suitable for captive high-voltage power plants in petrochemical, metallurgical, large manufacturing, railway and other industries. Targeting characteristics of industrial systems including abundant impact loads, complex electromagnetic environments and high continuity-of-supply requirements, it delivers strong anti-interference, wide power supply tolerance and stable interlock control to guarantee continuous safe operation of industrial high-voltage systems and avoid outages and production losses.
