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GE 246B2323AAG02

Product Name:​ GE Multilin 246B Digital Feeder Protection Relay
Product Introduction:​ The GE 246B2323AAG02 is a digital feeder protection relay in the GE Multilin 246B series (under GE Grid Solutions). It is primarily deployed for the protection of medium-voltage feeders and distribution transformers, integrating overcurrent, differential, and earth-fault protection functions. It serves as a core protection device in distribution automation systems.
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Detailed content

Technical Specifications:
  • Rated current: 5 A / 1 A (selectable)
  • Rated voltage: 110 V / 220 V AC or DC (optional)
  • Input channels: 8 binary inputs + 4 analogue inputs (expandable)
  • Output contacts: 8 programmable output relays (4 NO + 4 NC)
  • Communication interfaces: RS-485 / RS-232 / Ethernet (IEC 61850 / Modbus / DNP3.0)
  • Power consumption: < 8 W
  • Accuracy: Current measurement ±0.5%; time accuracy ±1 ms
  • Ambient temperature: -20 °C to +70 °C
Functional Features:
  • Three-stage overcurrent protection (50/51): Definite-time and inverse-time curves, IEC standard curves supported
  • Residual overcurrent protection (50N/51N): Earth-fault detection and protection
  • Overvoltage / undervoltage protection
  • Integrated fault recording function
Application Scenarios:​ Medium-voltage distribution feeders, distribution transformer protection, and distribution automation systems.
Installation Requirements:
  • Mount in a standard relay cabinet / switchgear panel
  • CT secondary circuits must be reliably grounded (grounding resistance ≤ 4 Ω)
  • Auxiliary power wiring must observe correct L/N polarity
  • Communication cabling shall use shielded twisted pair; maximum communication distance 1200 m
Usage Precautions:
  • CT ratio must be accurately configured in the relay settings, otherwise protection pick-up values will be incorrect
  • Never connect voltage signals to current input terminals
  • Verify all wiring is tight and secure before energising the relay
  • Recommended calibration interval: once every 2 years to ensure protection accuracy

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