Description
1. Overview
ABB 1MRK002311-AAr02 is an original isolated internal power supply board dedicated for the ABB Relion 670 series, fully compatible with REC670, RET670 and REG670 substation protection and measurement IEDs. As the core power supply unit of power secondary protection equipment, it supports wide-range DC110V/DC220V substation standard DC input. Through high-frequency isolation and voltage stabilization conversion, it provides multiple channels of pure and stable isolated working power for the device main CPU, signal sampling circuit, backplane I/O modules, communication units and HMI panels.
Equipped with multi-level hardware protection, real-time operation self-diagnosis and fault alarm upload functions, the board effectively resists grid voltage fluctuation, transient surge, electromagnetic interference and abnormal load conditions, avoiding common device faults such as black screen, repeated restart, sampling abnormality, communication interruption and protection mal-operation/refusal. Adopting industrial conformal coating and rugged design, it adapts to 24/7 continuous operation in harsh substation environments. It is widely used for new substation equipment matching, faulty power board replacement, power secondary system upgrading and spare part reservation for power grid and industrial enterprises.
2. Technical Features
1. Original Exclusive Compatibility
Fully matched with the hardware architecture of ABB Relion 670 series IEDs in slot definition, power supply timing, backplane bus protocol and installation dimensions. Exclusively applicable to REC670 line protection, RET670 transformer protection and REG670 integrated protection devices. Different suffix versions of the same series are not universal. The 1MRK002311-AAr02 model supports plug-and-play in-situ replacement without program upgrading, configuration modification or wiring adjustment, ensuring zero adaptation conflicts and zero debugging costs.
2. Fully Isolated Stabilized Power Supply with High Anti-Interference Performance
Adopting a high-frequency isolated switching power supply structure, it realizes complete electrical isolation between input and output sides, thoroughly filtering substation DC system noise, voltage drift, transient surge and electromagnetic crosstalk. The output multi-channel low-voltage DC power features ultra-low ripple and high precision, providing pure power for high-precision sampling circuits, CPU logic operation and protection trip output loops. It eliminates protection misjudgment, sampling deviation and communication jitter caused by power disturbance, ensuring accurate and stable operation of relay protection systems.
3. Multi-Dimensional Hardware Protection for High Operational Safety
Integrated multi-layer hardware protection mechanisms including reverse connection prevention, overvoltage/undervoltage protection, output overcurrent protection, load short-circuit protection and overheating protection. In case of abnormal power supply, short circuit, overload or overheating, the board automatically limits current and cuts off output to protect the mainboard, I/O boards and communication boards from burnout and prevent fault propagation, greatly improving the fault tolerance and operational safety of secondary protection equipment.
4. Intelligent Self-Diagnosis and Accurate Fault Tracing
Built-in independent monitoring circuit realizes 24/7 real-time monitoring of input voltage, output load, board temperature and operating status. It accurately identifies power loss, voltage abnormality, load short circuit, overheating and module failure. Fault signals are uploaded to the main CPU and background monitoring system via the GD backplane bus, generating time-stamped fault logs for rapid fault location, reducing maintenance difficulty and power outage time.
5. Industrial Rugged Design for Harsh Power Conditions
Made of high-quality industrial PCB with full-board conformal coating (moisture-proof, dust-proof, anti-corrosion). It has passed standard EMC, high/low temperature cycle, vibration and impact aging tests, featuring excellent humidity resistance, aging resistance, vibration resistance and EMI resistance. It supports long-term 24/7 continuous operation in substation protection panels and high-voltage switchgears, meeting the long-term maintenance-free operation requirements of power equipment.
6. Modular Plug-in Design for Efficient Maintenance
Standard compact modular board structure matches the dedicated internal slots of 670-series devices. It supports fast plug-and-play replacement after device power-off without modifying cabinet power circuits, secondary wiring and protection logic. The device can be put into operation normally after power-on, greatly shortening the construction period of fault maintenance, system expansion and technical renovation, adapting to short-time overhaul and non-stop upgrading requirements of substations.
3. Technical Specifications
3.1 Basic Parameters
Model: 1MRK002311-AAr02; Brand: ABB; Product Type: Relay Protection IED Built-in Power Supply Board; Compatible Devices: ABB Relion 670 Series (REC670 / RET670 / REG670) Protection & Measurement Devices; Bus Protocol: GD Backplane Dedicated Bus; Core Functions: Isolated stabilized power supply, electrical interference isolation, multi-level fault protection, real-time self-diagnosis, fault alarm upload; Application Scenarios: Substation secondary protection equipment matching, faulty power board replacement, power system technical upgrading and expansion, relay protection spare parts.
3.2 Electrical Performance Parameters
Input Voltage: DC 110V / DC 220V wide-range universal; Input Adaptability: Tolerates grid voltage fluctuation and transient surge impact; Output Characteristics: Multi-channel isolated low-voltage DC output, high precision, ultra-low ripple; Electrical Isolation: Complete input-output electrical isolation, compliant with power secondary insulation standards; Protection Mechanism: Reverse connection, overvoltage, undervoltage, overcurrent, short circuit and overheating full protection; Startup Mode: Soft-start design to suppress instantaneous inrush current and protect precision components; Stability: No voltage drop or overheating under long-term full-load operation with stable power timing.
3.3 Monitoring & Communication Parameters
Monitoring Items: Input voltage, output load current, board temperature, module operating status; Alarm Mode: Onboard indicator local prompt + backplane bus remote alarm upload; Log Function: High-precision time-stamped fault recording for fault review and tracing; System Linkage: Real-time status synchronization with main CPU to trigger device fault locking and alarm logic.
3.4 Mechanical & Mounting Parameters
Mounting Method: Embedded plug-in installation for dedicated slots of 670-series IEDs; Structure: Standard original modular board; Protection Process: Full-board conformal coating; Hardware Matching: Fully compatible with original slot pins, installation size and bus definition; Maintenance: Supports fast disassembly and replacement for on-site overhaul and expansion.
3.5 Environmental Parameters
Operating Temperature: -20℃～+70℃; Storage & Transport Temperature: -30℃～+80℃; Operating Humidity: 5%～95%RH (non-condensing, no corrosive gas); Environmental Resistance: High EMI resistance, vibration resistance, humidity & dust resistance, anti-aging; Operation Mode: 24/7 year-round unattended continuous operation.
4. Operating Principle
The ABB 1MRK002311-AAr02 power supply board follows the closed-loop working process: DC Input Filtering → Surge Suppression Protection → Electrical Isolation & Stabilization → Multi-Channel Voltage Conversion → Graded Power Supply → Real-Time Operation Monitoring → Fault Protection Locking & Alarm. After receiving standard substation DC power input, the board filters grid noise and transient interference through front-end filtering and surge suppression circuits, completes electrical isolation and precise voltage conversion via high-frequency isolated power circuits, and outputs multiple stable low-voltage DC power sources to independently supply power for the device main control system, signal sampling circuit, I/O output circuit, communication module and HMI panel.
In normal operation, the board dynamically adapts to load changes and maintains continuous stabilized output, while collecting real-time power supply parameters, load status and temperature data to synchronize with the main CPU via the backplane bus. In case of abnormal input voltage, loop short circuit, overload or overheating, the hardware protection circuit acts instantly to cut off output power, lock device operation and upload fault alarm logs to prevent fault propagation. After fault elimination, the board automatically resets and recovers power supply, ensuring stable power supply, closed-loop logic and accurate action of the entire relay protection system, and providing core power guarantee for the safe and stable operation of substation secondary protection systems.
5. Application Scenarios
1. Original Supporting Accessory for ABB 670-Series IEDs
As the exclusive core power component for Relion 670 series relay protection and measurement devices, it is widely matched with substation line protection, transformer protection, busbar protection, capacitor protection and automatic switching devices. It provides isolated, stable and safe working power for secondary protection equipment and serves as the basic core component for normal device operation.
2. Fault Replacement and Maintenance of Legacy Protection Equipment
Solves common power faults of existing 670-series devices, including black screen, power-on failure, repeated restart, power fault alarm, sampling abnormality and communication interruption. It can directly replace aging and damaged power boards in situ without modifying on-site wiring and system configuration, quickly restoring normal operation of protection equipment and reducing maintenance costs and power outage duration.
3. Technical Renovation and Expansion of Power Secondary Systems
Suitable for substation intelligent upgrading, secondary equipment expansion and protection system renovation projects. It provides original standard power boards for newly added and renovated ABB 670-series devices, ensuring consistent power supply, system compatibility and operational stability of expanded equipment and meeting the compliance acceptance requirements of power technical renovation projects.
4. Special Spare Parts for Power Industry
As a core vulnerable spare part for 670-series protection devices, it is widely stored in spare parts warehouses of power grids, industrial and mining enterprises, new energy stations and power operation and maintenance units. It can quickly respond to on-site emergency maintenance and temporary replacement demands, effectively avoiding potential safety hazards such as protection failure, power grid shutdown and equipment damage caused by power faults, and ensuring long-term stable and compliant operation of power systems.
