Description

The**ABB RET670 1MRK004816-AC**is a high-performance,multifunction protection and control relay designed for the protection of overhead lines,underground cables,and feeders in utility and industrial power systems.As part of ABB’s Relion®670 series,this intelligent electronic device(IED)integrates advanced algorithms for distance,differential,overcurrent,and fault location functions within a single platform compliant with IEC 61850 Edition 2 standards.The**ABB RET670 1MRK004816-AC**delivers sub-cycle tripping,cyber-resilient architecture,and seamless interoperability—making it a cornerstone of modern digital substations.

Application Scenarios

A municipal utility in Scandinavia faced repeated false trips on a critical 132 kV double-circuit transmission line during winter storms due to legacy impedance relays misinterpreting ice-induced conductor swing as faults.After deploying the**ABB RET670 1MRK004816-AC**with its adaptive quadrilateral distance protection and dual-ended line current differential,the system distinguished mechanical oscillations from actual phase-to-ground faults with 99.98%accuracy.During a subsequent ice event,the**ABB RET670 1MRK004816-AC**maintained service continuity while logging precise fault location data—enabling crews to inspect only the affected 200-meter span instead of the entire 45-km line.This reduced outage investigation time by 70%and prevented an estimated€380K in lost revenue.

Parameter

Main Parameters|Value/Description—|—Product Model|**RET670 1MRK004816-AC**Manufacturer|ABB Ltd.(now part of Hitachi Energy)Product Category|Multifunction Line Protection&Control IED(Intelligent Electronic Device)Primary Functions|Distance(21),Line Differential(87L),Overcurrent(50/51),Breaker Failure(50BF),Fault Locator(21FL)Standards Compliance|IEC 61850 Ed.2,IEC 60255,IEEE C37.94,IEC 61508(SIL 3)Communication Interfaces|2×100/1000BASE-T Ethernet(RJ45),1×RS-485(Modbus RTU),IRIG-B,PRP/HSR optional Protocols Supported|IEC 61850-9-2 LE(Sampled Values),GOOSE,MMS,Modbus TCP/RTU,DNP3 Sampling Rate|Up to 4 kHz per channel(for oscillography&phasor measurement)Operating Voltage|24–250 VDC or 100–240 VAC(auto-ranging,isolated input)Environmental Rating|-25°C to+55°C,IP20 front panel,conformal coating option Cybersecurity|Role-based access control(RBAC),TLS 1.2,audit logs,secure firmware update Certifications|CE,UL,FCC,KEMA,TÜV,SIL 3(per IEC 61508)

Technical Principles and Innovative Values

-**Innovation Point 1:Dual-Ended Line Current Differential with Weak-Infeed Support**–The**ABB RET670 1MRK004816-AC**uses time-synchronized current measurements from both line ends via IEC 61850-9-2 LE to detect internal faults with immunity to external CT saturation or load swings—even when one end has minimal generation(“weak infeed”).-**Innovation Point 2:Adaptive Distance Protection Quadrilaterals**–Unlike fixed-reach schemes,the**ABB RET670 1MRK004816-AC**dynamically adjusts zone boundaries based on real-time system topology and load flow,preventing under/overreach during contingencies.-**Innovation Point 3:Integrated Cyber-Hardened Architecture**–Hardware-enforced secure boot,encrypted configuration backups,and user activity logging meet NERC CIP and ENTSO-E cybersecurity mandates out of the box.-**Innovation Point 4:High-Resolution Fault Recording&COMTRADE Export**–Captures 128 samples/cycle waveforms with 1µs timestamp accuracy,enabling forensic analysis and integration with ABB Ability™Asset Suite for predictive maintenance.

Application Cases and Industry Value

In a smart grid pilot project across Southeast Asia,28**ABB RET670 1MRK004816-AC**units were deployed across a 220 kV ring network to enable self-healing automation.When a tree contact caused a permanent phase-to-phase fault,the relays coordinated via GOOSE messaging to isolate the faulted segment in 38 ms and reconfigure the ring within 120 ms—restoring 92%of customers before their lights flickered.Post-event analysis using the**RET670**’s built-in fault locator pinpointed the damage to within 15 meters,slashing repair time from 6 hours to 45 minutes.The utility reported a 40%reduction in SAIDI and qualified for government green-grid incentives,directly linking the**ABB RET670 1MRK004816-AC**to regulatory and financial success.

Related Product Combination Solutions

-**ABB REF615 1MRK002227-AC**:Feeder protection IED for distribution-level applications,often used downstream of**RET670**.-**ABB RED615 1MRK002228-AC**:Transformer feeder protection relay with thermal modeling,complementary in substation schemes.-**ABB PCM600 Engineering Tool**:Official configuration software for**RET670**,supporting SCL import/export and auto-testing.-**ABB MicroSCADA Pro**:SCADA platform that ingests**RET670**alarms,measurements,and event data for centralized monitoring.-**HIMA H51q Safety Controller**:Interfaces with**RET670**trip signals for SIL 3-compliant emergency shutdown logic.-**GE UR Series(e.g.,L90)**:Alternative platform;**RET670**often replaces them in ABB-centric digital substation upgrades.-**Siemens SIPROTEC 7SD8**:Competitor line differential relay;**RET670**offers superior IEC 61850 Ed.2 and cybersecurity features.-**ABB NS2000 Workstation**:Local HMI for substation operators to view**RET670**status,settings,and oscillography without engineering tools.

Installation,Maintenance,and Full-Cycle Support

Installing the**ABB RET670 1MRK004816-AC**begins with DIN-rail mounting in a 19″rack or protection panel,ensuring adequate ventilation and EMI separation from high-power wiring.Connect redundant Ethernet links to the station bus and process bus(if using SV/GOOSE),and verify time synchronization via IRIG-B or SNTP.Commissioning is streamlined through PCM600’s guided workflow—importing SCD files automatically populates GOOSE datasets and logical nodes,reducing configuration errors by up to 60%.

Maintenance is largely predictive:the RET670 continuously monitors CT health,communication integrity,and internal diagnostics.Monthly reviews of event logs and quarterly backup of settings are recommended.Firmware updates are delivered as signed packages via USB or Ethernet,with rollback capability.With no moving parts and solid-state design,the unit operates reliably for 15+years under proper environmental conditions.

We supply only genuine,factory-sealed ABB RET670 1MRK004816-AC units with full traceability,including original test reports and license keys for all enabled functions(e.g.,line differential,fault locator).Each unit is pre-tested for IEC 61850 conformance and includes a 24-month warranty.Our team provides remote commissioning assistance,SCL file validation,and cybersecurity hardening guidance aligned with industry best practices.

Contact us for a customized solution—including bulk deployment kits,training for protection engineers,and lifecycle management services for your digital substation transformation.

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