Overview

RET615 is a dedicated transformer protection and control IED (Intelligent Electronic Device) designed for power transformers, unit and step-up transformers, including power generator-transformer blocks in utility and industrial power distribution systems. The RET615 is part of ABB’s Relion® product family, specifically within the 615 protection and control series. These IEDs are known for their compactness and withdrawable design.

Specifications

• Dimensions:
  • Width:
    • Frame: 177 mm
    • Case: 164 mm
  • Height:
    • Frame: 177 mm (4U)
    • Case: 160 mm
  • Depth:
    • 201 mm (153 + 48 mm)
  • Weight:
    • Complete IED: 4.1 kg
    • Plug-in unit only: 2.1 kg

• Power Supply:
  • Nominal Voltage:
    • 100, 110, 120, 220, 240 V AC (50 and 60 Hz)
    • 24, 30, 48, 60 V DC
    • 48, 60, 110, 125, 220, 250 V DC
  • Maximum Interruption Time (Auxiliary DC Voltage):
    • 50 ms at Unrated
  • Auxiliary Voltage Variation:
    • 38...110% of Un (38...264 V AC)
    • 50...120% of Un (12...72 V DC)
    • 80...120% of Un (38.4...300 V DC)
  • Start-up Threshold:
    • 19.2 V DC (24 V DC * 80%)
  • Burden of Auxiliary Voltage Supply (Under Quiescent/Operating Conditions):
    • DC: < 12.0 W (nominal) / < 18.0 W (max)
    • AC: < 16.0 W (nominal) / < 21.0 W (max)
    • DC: < 12.0 W (nominal) / < 18.0 W (max)
  • Ripple in the DC Auxiliary Voltage:
    • Max 15% of the DC value (at a frequency of 100 Hz)
  • Fuse Type:
    • T4A/250 V

• Energizing Inputs:
  • Rated Frequency: 50/60 Hz
  • Current Inputs:
    • Rated Current (In):
      • 0.2/1 A
      • 1/5 A
    • Thermal Withstand Capability:
      • Continuously: 4 A (1) / 20 A (2)
      • For 1 s: 100 A (1) / 500 A (2)
    • Dynamic Current Withstand:
      • Half-wave value: 250 A (1) / 1250 A (2)
    • Input Impedance:
      • <100 mΩ (1) / <20 mΩ (2)
  • Voltage Inputs:
    • Rated Voltage: 60...210 V AC
    • Voltage Withstand:
      • Continuously: 240 V AC
      • For 10 s: 360 V AC
    • Burden at Rated Voltage: <0.05 VA