Description
1. Product Overview
Part Number: 1MRK005904-KB, sharing identical hardware baseboard with variants 1MRK005904-FC, 1MRK005904-GB, 1MRK005904-HB; differences lie only in factory preloaded software logic and interface configuration.
Manufacturer: ABBProduct Line: Digital protection and control IED within ABB Relion 670 Series, designed for 10kV~35kV distribution feeders, auxiliary power incoming & outgoing circuits and high-voltage switchgears. It serves as standard secondary protection equipment for substation integrated automation systems, power plant auxiliary control systems and captive power stations in chemical & metallurgical industries.
Model Coding Definition
- 1MRK: Unified part number prefix for ABB relay protection IED products;
- 005904: Base hardware platform ID, defining mainboard sampling circuit, backplane terminal definition and processor architecture;
KB: Custom configuration suffix, indicating standard basic feeder protection logic, reduced-capacity disturbance recording storage and basic single-Ethernet communication configuration, tailored for conventional distribution switching stations and ring main units with standard LCD & keypad HMI.
Product Definition: All-in-one intelligent relay protection terminal integrating fault protection, electrical quantity measurement, binary status 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. Meanwhile, it collects three-phase current, voltage, power and energy metering data to connect to substation SCADA, telecontrol master station and background monitoring system, realizing unattended automatic operation of distribution lines. It replaces multiple discrete electromagnetic relay protection loops and simplifies secondary wiring and cabinet layout.
2. Six Core Hardware Functional Units
2.1 Fault Protection Logic Calculation Unit
Equipped with 32-bit industrial real-time processor with editable multi-stage protection settings, supporting definite/inverse-time overcurrent protection, residual earth fault protection, negative sequence unbalance protection, undervoltage blocking overcurrent, over/undervoltage protection, under-frequency load shedding, three-phase auto-reclosing and circuit breaker failure protection. All parameters can be modified via front panel keys or PC configuration software. Trip commands are issued within milliseconds upon fault detection, with fault type, timestamp and electrical magnitude latched to prevent selective tripping, applicable to radial distribution lines, ring power supply circuits and transformer feeder protection for auxiliary power systems.
2.2 High-Precision Analog Sampling & Metering Unit
Multi-channel high-precision 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 total harmonic distortion with built-in basic metering function, eliminating the need for external energy meters and meeting fundamental 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 directly drive breaker closing/tripping, audible & visual alarm and auxiliary interlock loops. Each output channel is equipped with hardware anti-maloperation interlock to suppress EMI and surge voltage and avoid unintended tripping without commands.
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 of voltage & current data, retained permanently after power loss. A local USB port enables direct log and waveform export via U disk for post-fault location and root cause analysis.
2.5 Multi-Protocol Communication Networking Unit
One standard 100Mbps Ethernet port with optional dual-port redundant configuration. Natively supports IEC 60870-5-104 and Modbus TCP. A reserved RS485 serial port is compatible with IEC 60870-5-101 and Modbus RTU. It supports remote setting download, online firmware upgrade and parameter modification, seamlessly connecting to distribution automation master stations, substation integrated automation systems and power plant DCS auxiliary control 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 heat dissipation prevents dust and moisture ingress. Aging-prone electrolytic capacitors are eliminated to withstand temperature fluctuation, dust accumulation, EMI and low-frequency mechanical vibration inside switchgears for 24/7 maintenance-free continuous operation.
3. Technical Specifications
3.1 Basic Hardware Specifications
| Item | Specification |
|---|---|
| Part Number | 1MRK005904-KB |
| Product Series | ABB Relion 670 Feeder Protection & Control IED |
| Mounting | Standard 4U rack embedded cabinet 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 Sampling & Protection Electrical Parameters
- CT Current Input: 1A/5A auto-adaptive, measurement Class 0.2, protection Class 0.5
- PT Voltage Input: Standard 100V secondary voltage input
- DI Channels: 16 passive dry contacts, compatible with 110VDC/220VDC loop power supply
- DO Contacts: 8 SPDT relays, rated capacity 5A/250VAC
- Inherent Instantaneous Trip Time: ＜25ms
- SOE Time 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
- All-in-one integration of protection, control, remote signaling/control, energy metering and fault recording reduces secondary components inside switchgears, simplifies drawing design and field wiring, and minimizes 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, improving versatility and spare part management convenience.
- Full hardware backward compatibility with FC/GB/HB suffix variants with identical backplane pinout, enabling direct drop-in replacement requiring only configuration file re-download with minimal renovation workload.
- Optimized earth fault detection algorithm accurately locates single-phase earth faults on neutral ungrounded and arc suppression coil grounded distribution networks, solving the difficulty of fault line selection for traditional protection devices.
- Chinese LCD HMI allows on-site viewing of real-time electrical measurements, protection settings, fault alarms and communication status without background software for easy on-site inspection and parameter configuration.
- Modular split structure enables independent disassembly and replacement of the front panel without altering secondary wiring to the rear terminal base, improving maintenance efficiency.
5. Application Scenarios
1. Urban Power Grid 10kV Ring Main Units & Distribution Feeder Switchgears
Main protection for distribution overhead and cable feeders implementing short-circuit trip, earth fault isolation, three-phase auto-reclosing and ATS logic, connected to distribution automation master stations for remote line monitoring and fault 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, Data Center & Commercial Complex High-Voltage Power Distribution Rooms
Main incoming protection, bus section protection and ATS logic control for Class-I loads to minimize power outage scope upon fault occurrence.
