GE 469-P5-LO-A20-E
GE 469-P5-LO-A20-E - Image 2

GE 469-P5-LO-A20-E

Product Overview: The GE 469-P5-LO-A20-E is a specialized variant of the 469 series motor management relay. The “LO” designation indicates a Low-range control power supply. Combined with the “P5” 5 A CT compatibility, this relay is optimized for facilities where low-voltage DC control power (typically 24V DC or 48V DC) is utilized, while still protecting motors with standard 5 A CTs.

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Category: SKU: GE 469-P5-LO-A20-E

Description

GE 469-P5-LO-A20-E Technical Specifications:

  • CT Compatibility: 5 A secondary phase CTs.
  • Control Power: Low-range (LO) power supply (typically 24-48 VDC or 24-125 VDC, depending on exact sub-revision).
  • Communication: RS232 and RS485 ports.
  • Display: Standard 469 series 40-character LCD.

Functional Features:

  • Low-Voltage Operation: Safely operates on low-voltage DC control buses common in modern, compact MCCs.
  • Full Protection Suite: Retains all standard 469 protection features including overload, phase unbalance, and ground fault.
  • Space Efficient: Ideal for high-density motor control panels.

Application Scenarios:

  • Modern MCCs utilizing 24V DC or 48V DC control power.
  • Battery-backed emergency motor protection systems.
  • Retrofit projects replacing legacy low-voltage relays.

Material Composition & Structural Characteristics:

  • Power Supply Module: Integrated low-voltage DC-DC converter with high efficiency.
  • Protection: Internal overvoltage and reverse polarity protection on the control power input.
  • Chassis: Standard GE Multilin 469 form factor.

Working Principle: The relay draws power from the low-voltage DC control bus. It steps this voltage up internally to power the microprocessor and output relays. The 5 A CT inputs are processed identically to the high-voltage variants, providing identical motor protection regardless of the control power source.

Installation Requirements:

  • Polarity Check: Low-voltage DC supplies are polarity sensitive. Verify positive and negative connections before applying power.
  • Wire Sizing: Use adequately sized control wiring to prevent voltage drop, as low-voltage systems are more susceptible to line losses.
  • CT Grounding: Ground the secondary side of all 5 A CTs at a single point to prevent dangerous floating voltages.

Usage Precautions:

  • Power Supply Capacity: Ensure the 24V/48V DC power supply has sufficient amperage capacity to handle the relay’s inrush current during startup.
  • Do Not Mix: Never apply high-voltage AC/DC power to the “LO” control power terminals; this will instantly destroy the relay.
  • Diagnostics: Monitor the control power LED; a flickering LED may indicate an undersized power supply or loose connections.

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