ABB RET670 1MRK002816-AB Transformer Main Protection IED

ABB RET670 1MRK002816-AB Transformer Main Protection IED

I. Basic Definition of Model
Complete Model: RET670, Material Number for Order: 1MRK002816-AB
Product Series: ABB Relion 670 Series Specialized Protection Device for Digital Transformers (Mainstream Model in Smart Substations)
Code Explanation
RET670: Transformer Protection – Main Transformer Differential Protection Dedicated Model
1MRK002816: Basic Material Code for RET670 Complete Machine
AB: Standard Single Ethernet Hardware Standard Version
Core Distinction
RET670: Transformer Differential Protection; REL650/REF650: Line / Feeder Protection; REC650: Interval Controller; The programs and hardware of these three cannot be interchanged;
The 1VCF750090 series (REF542plus/SUE3000) you previously queried belong to two different platforms and are completely not interchangeable.

 Complete Machine Hardware Structure (Integrated Embedded Screen Mount)
1. Front HMI Human-Machine Interface
Graphical LCD Display, supports custom transformer primary wiring diagram;
Physical local closing / opening buttons, navigation function knobs, 15-color status LED (operation, differential action, fault, alarm, communication);
Front RJ45 Local Debugging Port, computer direct connection to PCM600 for setting values and reading waveforms.
2. Modular Terminal Partition on the Back
CT/PT Analog Input Terminal: Suitable for double-winding / triple-winding transformers on multiple CT sides (1A/5A adaptive), PT 100V voltage;
DI Digital Input: Circuit breaker position, spring energy storage, remote / local, protection action, disconnect switch / ground knife position, cabinet door interlock;
DO Trip Output: High and low voltage side three-phase trip, failure remote trip, energy storage motor, fault alarm relay;
Communication Terminals: Single Ethernet, RS485/SPA Optical Fiber Bus, IRIG-B/PTP Time Synchronization;
Auxiliary Power Supply: Wide-range AC/DC Operating Power Supply Terminal.

Core Complete Protection Functions (Mainly Transformer Differential Protection)
1. Main Protection: Transformer Differential Protection (Core)
Suitable for double-winding, triple-winding, autotransformer, generator main transformer, phase-shift transformer;
Built-in secondary harmonic braking (excitation surge current locking), fifth harmonic braking (overexcitation locking), CT saturation waveform recognition braking;
Sensitive Ground Differential, distinguishes internal / external ground faults, rapid tripping for low-impedance winding grounding;
Up to 6 channels of constraint CT access, meeting the multi-breaker sectional transformer architecture; Fault action time within the zone is less than 20ms.
2. Backup Protection Complete Configuration
Three-stage phase-to-phase distance protection, two-stage directional overcurrent, inverse-time overcurrent, negative-sequence overcurrent;
Two-stage zero-sequence grounding, zero-sequence overvoltage, winding thermal overload, overexcitation protection;
Circuit breaker failure BFP, CT disconnection, PT disconnection, tripping circuit disconnection full monitoring;
Extended Functions: Automatic Reclosing, Bus Section BFT Backup Switching, Loss-of-sync Oscillation Lockout.
3. Measurement, SOE and Fault Recording
Three-phase voltage, current, active / reactive power, energy 0.5-class high-precision measurement;
SOE Event Resolution 1ms, complete recording of switch position change, protection action;
Large-capacity fault disturbance recording, records voltage and current waveforms before and after the fault, supports remote transmission to the upper level.

Communication and Timing (Hardware Configuration of 1MRK002816-AB)
Ethernet: Single RJ45, native support for IEC61850 MMS/GOOSE Smart Station Standard; Serial bus: SPA optical fiber, Modbus RTU, IEC 60870-5-103;
Remote transmission expansion: IEC 60870-5-104, DNP3.0;
Time synchronization: IRIG-B direct code, PTP network precise time synchronization, full station time sequence synchronization.