Description
1. Product Overview
Part Number: 1MRK005904-GB, fully hardware compatible with FC, KB and HB variants on the same baseboard. They share identical backplane terminal definition, mechanical dimension and mainboard hardware, differing only in factory preloaded protection program, communication configuration and disturbance recording capacity.
Manufacturer: ABBProduct Line: Standard feeder protection and control IED under ABB Relion 670 Series, designed for 10kV~35kV distribution feeders, auxiliary power outgoing circuits and switchgear bay protection. widely applied in substation integrated automation systems, power plant auxiliary control systems and secondary protection loops of captive power stations in chemical and metallurgical industries.
Model Coding Definition
- 1MRK: Unified part number prefix for ABB relay protection IED equipment;
- 005904: Base hardware platform code, defining sampling circuits, processor architecture, backplane terminal layout and overall mechanical structure;
- GB: Standard commercial configuration suffix with standard feeder protection logic, single Ethernet basic communication and standard-capacity fault recording, tailored for standardized projects of conventional distribution switching stations, ring main units and ordinary auxiliary power feeders.
Product Definition: All-in-one intelligent relay protection terminal integrating fault protection, electrical quantity measurement, binary signal acquisition, remote switching control, sequence of events recording, fault disturbance recording and telecontrol communication. It locally identifies and issues trip commands for phase-to-phase short circuit, overload, single-phase earth fault, over/undervoltage, frequency deviation and three-phase unbalance faults. Real-time collection of three-phase current, voltage, power and energy metering data enables connection to SCADA background, distribution automation master station and plant DCS system for unattended automatic operation of distribution circuits. It directly replaces multiple discrete electromagnetic relay protection loops and simplifies secondary wiring and cabinet components.
2. Six Core Hardware Functional Units
2.1 Fault Protection Logic Calculation Unit
Equipped with 32-bit industrial real-time processor with editable protection settings, supporting definite/inverse-time overcurrent protection, residual earth fault protection, negative sequence three-phase unbalance protection, undervoltage blocking overcurrent, over/undervoltage protection, under-frequency load shedding, three-phase auto-reclosing and circuit breaker failure protection. Parameters and time delays can be modified via front panel keys or PC configuration software. Trip command is issued within milliseconds upon fault detection with fault type, timestamp and electrical magnitude latched, plus anti-overstep tripping logic for radial distribution lines, transformer feeders and ordinary motor outgoing circuits.
2.2 High-Precision Analog Sampling & Metering Unit
Multi-channel anti-interference transformer sampling circuits accept standard CT 1A/5A and PT 100V secondary signals. Current measurement accuracy reaches Class 0.2 and protection sampling Class 0.5. It calculates active/reactive power, power factor, four-quadrant bidirectional energy and harmonic distortion rate with built-in metering function, eliminating external energy meters and meeting line energy statistics and power assessment requirements.
2.3 Binary Input Acquisition & Remote Control Output Interlock Unit
16 passive DI binary input channels collect circuit breaker position, disconnector auxiliary contact, spring charging status, device alarm and protection setting switch status. 8 independent SPDT relay DO outputs with rated capacity 5A/250VAC directly drive breaker switching, audible/visual alarm and auxiliary interlock loops. Hardware anti-maloperation interlock is added to each output channel to suppress electromagnetic surge and interference voltage and prevent unintended tripping.
2.4 SOE Event Storage & Fault Disturbance Recording Unit
Non-volatile memory stores minimum 1000 SOE records with time resolution ≤1ms. Fault trigger generates COMTRADE-format disturbance waveforms including 4 pre-fault cycles and 8 post-fault cycles, with data retained after power loss. A local USB port supports log and waveform export via U disk for fault tracing and accident analysis.
2.5 Multi-Protocol Communication Networking Unit
One standard 100Mbps Ethernet port natively supporting IEC 60870-5-104 and Modbus TCP. A reserved RS485 serial port is compatible with IEC 60870-5-101 and Modbus RTU. Remote setting download, online firmware upgrade and parameter modification are supported to realize four-remote interaction (telemetry, telesignalisation, remote control, remote adjustment) with distribution automation systems, substation integrated automation background and plant auxiliary DCS platforms.
2.6 Industrial Reinforced Environmental Adaptation Unit
Split modular structure of front HMI panel and rear terminal base. Double-sided conformal coating is applied against moisture, salt fog and corrosion. Fanless enclosed passive heat dissipation prevents dust and moisture ingress. Aging-prone electrolytic capacitors are eliminated to withstand temperature fluctuation, dust accumulation, mechanical vibration and EMI inside switchgears for 24/7 maintenance-free continuous operation.
3. Technical Specifications
3.1 Basic Hardware Specifications
| Item | Specification |
|---|---|
| Part Number | 1MRK005904-GB |
| Series | ABB Relion 670 Standard Feeder Protection & Control IED |
| Mounting | Standard 4U embedded rack installation |
| Dimension | 177mm(H) × 226mm(W) × 240mm(D) |
| Net Weight | Approx. 2.1kg |
| Power Supply | Universal AC/DC 88~264V wide-range input |
3.2 Core Electrical Parameters
- CT Input: 1A/5A adaptive, measurement Class 0.2, protection Class 0.5
- PT Input: Standard 100V secondary voltage input
- DI Channels: 16 passive dry contacts, compatible with 110VDC/220VDC loop power
- DO Contacts: 8 SPDT relay outputs, 5A/250VAC resistive load rating
- Inherent Instantaneous Trip Time: ＜25ms
- SOE Resolution: ≤1ms, minimum 1000 event logs
- Disturbance Recording: 4 pre-fault cycles + 8 post-fault cycles waveform storage
3.3 Environmental & Safety Compliance
- Operating Temperature: -25℃ ~ +65℃
- Storage & Transport Temperature: -40℃ ~ +85℃
- Humidity: 5%~95%RH non-condensing, free of corrosive gas and salt fog deposition
- Dielectric Withstand Voltage: 2kVAC 1min between channels and chassis without breakdown or flashover
4. Product Advantages
- Highly integrated protection, control, remote signaling/control, energy metering and fault recording reduce secondary components inside switchgears, simplify drawing design and field wiring, and minimize potential fault points.
- Universal 88~264V AC/DC power input adapts to substation 220V DC control power and plant auxiliary AC power without power type differentiation during project design and spare part management.
- Full hardware backward compatibility with FC, KB and HB suffix variants with identical terminal pinout, enabling direct drop-in replacement requiring only configuration file re-download with no secondary wiring modification.
- Optimized earth fault detection algorithm accurately identifies single-phase earth faults on neutral ungrounded and arc suppression coil grounded distribution networks to eliminate misjudgment and missed detection of traditional protection devices.
- Chinese LCD HMI enables on-site viewing of real-time electrical measurements, protection settings, fault alarms and communication status without background software for convenient on-site inspection and parameter configuration.
- Split front-rear structure allows independent disassembly and replacement of the front panel while the rear terminal base remains fixed, eliminating cable rewiring during HMI maintenance and reducing workload.
5. Application Scenarios
1. Urban Power Grid 10kV Ring Main Units & Distribution Feeder Switchgears
Main protection for overhead and cable distribution feeders implementing short-circuit trip, earth fault isolation, auto-reclosing and ATS logic, connected to distribution automation master station for remote monitoring and fault section isolation.
2. Thermal & Hydropower Plant 6kV/10kV Auxiliary Power Systems
Feeder protection for transformer low-voltage outgoing circuits and auxiliary motors such as induced draft fans, forced draft fans and condensate pumps, executing overload, short-circuit and phase-loss trip with data interconnection to plant DCS and auxiliary control systems.
3. Captive Power Plants & Main Step-Down Substations in Chemical & Metallurgical Industry
Incoming line protection for high-voltage distribution systems of chemical parks, adapting to heavy EMI environment caused by inverters and large motors to guarantee stable power supply for continuous production processes.
4. Rail Transit, Commercial Complex & Building High-Voltage Power Distribution Rooms
Main incoming protection, bus section protection and basic ATS logic control to quickly isolate fault circuits and minimize power outage scope upon faults for basic reliability of Class-I loads.
