Document Outline

• COVER
• INTRODUCTION
• REVISION HISTORY
• CONTENTS
• 1 • GENERAL INFORMATION
  • Introduction
  • Features
  • Specifications
    • Time Overcurrent (51) Element
      • BE1-50/51B-237 Pickup
      • BE1-50/51B-238 Pickup
      • Dropout
      • Characteristic Curves
      • Fixed Timing
      • Reset
    • Instantaneous Overcurrent A (50-A) Element
      • BE1-50/51B-237 Pickup
      • BE1-50/51B-238 Pickup
      • Dropout
      • Time Delay
    • Instantaneous Overcurrent B (50-B) Element
      • BE1-50/51B-237 Pickup
      • BE1-50/51B-238 Pickup
      • Dropout
      • Time Delay
      • Reset Characteristic
    • Current Sensing Input
      • BE1-50/51B-237
      • BE1-50/51B-238
      • BE1-50/51B-237 Burden
      • BE1-50/51B-238 Burden
    • Frequency Response
    • Transient Response
    • Harmonic Rejection
    • Target Indicators
      • Minimum Operating Current
    • Output Contacts
      • Resistive Ratings
      • Inductive Ratings
      • Terminal Assignments
    • Type Tests
    • Environment
    • GOST-R Certification
    • Physical
• 2 • CONTROLS AND INDICATORS
  • Introduction
  • Front Panel Controls and Indicators
  • Circuit Board Controls
• 3 • FUNCTIONAL DESCRIPTION
  • Introduction
  • Function Block Descriptions
    • Current Sensing Input
    • Power CT and Power Supply
    • Signal Conditioning
    • Microprocessor
    • Outputs
    • Target Indicators
• 4 • INSTALLATION
  • General
  • Factory Settings
  • Installation
  • Connections
  • Application Coordination
  • Maintenance
  • Storage
• 5 • TESTING
  • Introduction
  • Dielectric Test
  • Test Procedures
    • Model BE1-50/51B-237 (Five Ampere Sensing Input)
      • Time Overcurrent (51) Pickup
      • Time Dial
      • Integrating Reset
      • Instantaneous Overcurrent A (50-A) Pickup
      • Instantaneous Overcurrent B (50-B) Pickup
      • Target Indicators
      • Manual Trip
    • Model BE1-50/51B-238 (One Ampere Sensing Input)
      • Time Overcurrent (51) Pickup
      • Time Dial
      • Integrating Reset
      • Instantaneous Overcurrent A (50-A) Pickup
      • Instantaneous Overcurrent B (50-B) Pickup
      • Target Indicators
      • Manual Trip
• A • CHARACTERISTIC CURVES
  • Introduction
  • Instantaneous Overcurrent Characteristics
    • Timing
    • Pickup
  • Time Overcurrent Characteristics
    • Inverse Time Functions
    • Characteristic Curve Groups
      • Characteristic Curve Constants
      • Characteristic Curves
    • Timing Accuracy
    • Fixed Time Characteristic
  • Integrating Time Reset Characteristic
    • Instantaneous Reset