The ABB REJ603BBB10NN3XC is a self-powered feeder protection relay that is used to protect secondary distribution networks in utilities and industries. It is a numerical relay, which means that it uses digital signal processing to perform its protection functions. This makes it more accurate and reliable than traditional electromechanical relays.

Features

• Three-phase overcurrent protection
• Earth-fault protection
• Transformer inrush protection
• Remote trip
• Low energy trip output
• Self-powered, does not require an external power supply
• Available with a variety of current transformer (CT) ratings
• Can be configured to use either internal or external earth-fault measurement
• Built-in self-supervision system
• Compatible with a variety of communication protocols

Technical Specifications

• Rated frequency: 50/60 Hz ± 5 Hz
• Phase inputs:
  • Nominal primary current range: 8 – 28 A
  • Thermal withstand capability:
    • Continuously: 2.5 x Ismax
    • For 1 s: 25 kA primary current
    • For 3 s: 20 kA primary current
  • Dynamic current withstand:
    • Half-wave value: 62.5 kA primary current
• Earth input:
  • Rated current, In: 1 A
  • Thermal withstand capability:
    • Continuously: 4 A
    • For 1 s: 100 A
    • Dynamic current withstand:
    • Half-wave value: 250 A
• Binary inputs:
  • Rated voltage: 24 – 240 V AC/DC
  • Operating range: -15%…+10% for AC, -30% … +20% for DC
  • Current drain: 2…15 mA
  • Power consumption: < 0.8 W
  • Threshold voltage: 13 V AC/17 V DC
• Impulse voltage trip output:
  • Rated output voltage: 12 V
  • Pulse time: 30 ms
  • Energy: 50 mJ

Applications

The ABB REJ603BBB10NN3XC can be used in a variety of applications, including:

Secondary distribution networks in utilities and industries

It can also be used to protect a variety of equipment, including:

• Substations
• Power plants
• Data centers
• Critical infrastructure
• Transformers
• Motors
• Generators
• Switchgear
• Cables