ABB RET670 1MRK004816-AC – Detailed Information

Description

1. Technical Specifications

• Rated auxiliary supply: 24 V DC or 230 V AC, 50/60 Hz
• Rated current: 10 A continuous per relay contact set
• Inputs
  – Current: 1 A / 5 A programmable
  – Voltage: 100–120 V AC or 110 V DC nominal
• Analog measurement accuracy: ±0.05 % of reading
• Binary inputs & outputs: configurable 8-contact relay card
• Communication
  – Protocols: IEC 61850-8-1, Modbus TCP/RTU, DNP3
  – Media: dual-fiber Ethernet (multimode/single-mode), RJ-45 (copper)
  – Redundancy: PRP/HSR and RSTP supported
• Environmental
  – Operating temperature: –20 °C … +55 °C
  – Humidity: 5 % … 95 % non-condensing
  – Vibration & shock: IEC 60255-21-1 class 2

3. Functional Features

• Multifunction protection: transformer differential, restricted earth fault, overcurrent, overvoltage, undervoltage, overload, frequency and thermal protection in one device
• Interval control: circuit-breaker close/open, interlocking, synchronism check and bay-level automation
• Programmable logic: 20 ms cycle time, 256 function blocks, graphical configuration tool
• Self-supervision: automatic health monitoring, event buffer (1000 entries), fault recording (up to 10 s)
• Hot-swap capability: withdrawable module design simplifies maintenance without shutting down the switchgear
• Security: role-based access, encrypted firmware, audit log

4. Typical Applications

• Power generation: step-up transformer protection in coal, gas, hydro and wind plants
• Transmission & distribution: feeder and busbar protection in 33 kV–220 kV substations
• Industrial plants: MV motor and transformer protection with bay control in refineries, steel mills and mining sites
• Commercial & infrastructure: integrated protection and control for ring-main units and data-center switchgear