GE 869-E-P1-P1-B1-H-S-S-A-L-A-M-M-P-F-B-SE-N-N-B-N-1
GE 869-E-P1-P1-B1-H-S-S-A-L-A-M-M-P-F-B-SE-N-N-B-N-1 - Image 2

GE 869-E-P1-P1-B1-H-S-S-A-L-A-M-M-P-F-B-SE-N-N-B-N-1

Product Overview: The GE Multilin 869 is a comprehensive motor protection and management relay designed for medium-voltage and high-power motor applications. The catalog number 869-E-P1-P1-B1-H-S-S-A-L-A-M-M-P-F-B-SE-N-N-B-N-1 represents a fully configured unit with advanced protection, monitoring, and communication capabilities. This relay provides complete motor safeguarding against electrical and mechanical faults while offering predictive maintenance insights.

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Category: SKU: GE 869-E-P1-P1-B1-H-S-S-A-L-A-M-M-P-F-B-SE-N-N-B-N-1

Description

GE 869-E-P1-P1-B1-H-S-S-A-L-A-M-M-P-F-B-SE-N-N-B-N-1

Technical Specifications:

  • Current Inputs: Three-phase CT inputs (1A or 5A secondary) with 20 times overload capacity

  • Voltage Inputs: Three-phase VT inputs up to 690V line-to-line direct or 120V/240V via VT

  • Frequency: 50/60 Hz nominal; 20-70 Hz operating range

  • Power Supply: 85-265V AC or 100-250V DC (universal power supply)

  • Protection Elements: Thermal overload, short circuit, ground fault, phase unbalance, under/overvoltage, under/overfrequency, stall, jam, bearing temperature, vibration

  • Communication: Dual Ethernet ports, RS-485, USB front port, optional fiber optic

  • Housing: Draw-out case design for withdrawal without disconnecting wiring

  • Contact Outputs: 8 programmable Form C relays with 10A contact rating

Functional Features:

  • Motor Thermal Model: Real-time thermal capacity tracking with learned cooling time constants

  • Start Control: Configurable number of starts per hour with adjustable inter-start time

  • Load Jam Protection: Instantaneous and time-delayed overcurrent for mechanical jam detection

  • Vibration Monitoring: Integration with accelerometers for bearing fault detection

  • Power Quality: Harmonic analysis through 31st harmonic with THD calculation

  • Event Recording: 512 time-stamped events with 1-millisecond resolution

  • Waveform Capture: 64 cycles of pre-fault and post-fault oscillography at 16 samples per cycle

  • Motor Health Report: Automatic generation of insulation resistance trends and start characteristics

Application Scenarios:

  • Medium-voltage motor protection in petrochemical plants
  • Large pump and compressor motor monitoring in water treatment
  • Fan and blower motor protection in HVAC systems
  • Conveyor and crusher motor safeguarding in mining operations
  • Main propulsion motor monitoring in marine vessels
  • Chiller motor protection in commercial building complexes

Performance Parameters:

  • Current Accuracy: ±0.2% of nominal from 0.1 to 20 times CT rating

  • Voltage Accuracy: ±0.1% of nominal from 10% to 120% of VT rating

  • Protection Operating Time: Less than 20 milliseconds for instantaneous elements

  • Communication Latency: Less than 10 milliseconds for GOOSE messages

  • Temperature Drift: ±0.01% per degree Celsius

Structural Characteristics:

  • Draw-out mechanism with safety shutters for isolation during maintenance
  • Large graphical LCD display with 40-character by 16-line visibility
  • 24 LED indicators for status, alarm, and trip condition annunciation
  • Sealed front panel with IP54 protection rating
  • Rear terminal blocks with screw compression or ring lug connections

Working Principle: The 869 relay continuously samples three-phase currents and voltages at 16 times per power cycle. The digital signal processor calculates symmetrical components (positive, negative, zero sequence), true RMS values, and power quantities. The thermal model algorithm tracks motor heating based on current magnitude and previous thermal history, predicting insulation temperature rise. When any measured parameter exceeds the programmed threshold, the relay operates the appropriate output contacts to trip the circuit breaker or activate alarms. The relay also monitors motor start characteristics, comparing current and speed profiles against baseline data to detect mechanical degradation.

Installation Requirements:

  • Install in switchgear cubicle with proper CT and VT shorting facilities
  • Connect control power through a dedicated fuse or breaker
  • Configure CT ratios, motor full load amps, and service factor before energization
  • Program communication addresses and network parameters
  • Perform primary injection testing to verify protection element pickup

Usage Precautions:

  • Never open CT secondary circuits while the relay is energized
  • Verify all safety interlocks before withdrawing the relay from its case
  • Backup settings before making configuration changes
  • Test trip circuits quarterly to ensure output relay integrity
  • Review event logs after any motor trip to determine root cause

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