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EW32EAG
Technical information
Fuji Electric EW32EAG Technical Information
Molded case circuit breakers & earth leakage circuit breakers
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Contents
Table of Contents
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Table of Contents
Environment and Usage Precautions
Table of Contents
Chapter 1 Protecting Low-Voltage Circuits
Description
Overcurrent Protection
Overcurrent Fault
Phase-Loss Protection
Phase-Loss Fault
Phase-Loss Burnout Protection (Three-Phase Circuit)
Operating Characteristics 2 and Performance Chapter
Chapter 2
Overcurrent Tripping Characteristics
Types of Tripping
Factors Affecting Overcurrent Trip Characteristics
Breaking Performance
Short-Circuit Current Breaking
Breaking Characteristics
Arc Space
Reset Time
Operating Characteristics and Performance
Overload Switching Performance
Performance with Current at 100
Performance with Current at
Temperature Rise
Internal Resistance and Power Consumption
Durability
Switching Durability
Trip Switching Durability
Rated Ultimate Short-Circuit Breaking Performance
Switching Durability of Accessories
Withstand Voltage Performance
Rated Power Frequency Withstand Voltage (IEC 60947-1, 2)
Rated Impulse Withstand Voltage (IEC 60947-1, 2)
Handle Operating Force and Angle
Selection and Application 3
Chapter 3
Selection Check Points
MCCB Selection Check Points
Selecting and MCCB Ratings
Overcurrent Protection Principle
Protective Coordination
Cascade Trip Applications
Conditions for Cascade (Backup) Trip Coordination
Criteria for Cascade (Backup) Trip Coordination
Selective Trip Applications
Selective Trip Coordination of Breakers
Selective Trip Coordination between Mccbs and High-Voltage Side Protective Devices
Selective Trip Coordination with a High-Voltage Fuse
Wiring Protection
Description
Thermal Characteristics of Wire
Application of Protective Devices
Motor Circuit Applications
Description
Applications on the Primary Side of Transformers
Inrush Current for Transformer Excitation
Selecting an MCCB for Transformer Primary Circuit
Transformer Primary-Side Circuit Selection
Welder Circuit Applications
Arc Welders
Resistance Welders
Selecting an MCCB for Capacitor Circuit
Characteristics Specific to Capacitor Circuits
Mccbs for Semiconductor Circuit
Faults and Overcurrents in Thyristor Converters
MCCB Rated Current
Protecting Thyristors from Overcurrent
Protecting Sscs Using Mccbs or Mmss
For Heater (Resistive Load) Circuits
Motor Circuits
Protecting Inverter Circuits Using Mccbs
Inverter Circuits
Mccbs for High Frequency Circuits
Mccbs for DC Circuit Applications
Mccbs for UPS Applications
Mccbs for Servo Amplifier Applications
Ground Fault Protection in System Applications
Grounding Methods and Ground Fault Protection in System Applications
Environment and Usage 4 Precautions Chapter
Standard Conditions
Application to Special Environments
High-Temperature, High-Humidity Applications
Cold Climate Applications
High Altitude Applications
Application to Special Atmospheres
Environment and Usage Precautions
Connection Precautions
Reversed Connection
Tightening Torque
Malfunction Due to Transient Inrush Current
Maintenance Inspections 5
Chapter 5
Faults and Causes
Periodic Inspections
Initial Inspection
Inspection Following Overcurrent Tripping
Replacement Recommendations
Recommendations for MCCB Deterioration Diagnosis and Replacement
Recommended Replacement Guidelines Based on Switching Durability
Calculating Short-Circuit Current
Chapter 6 Short-Circuit Current Calculation
Glossary
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Table of Contents
2
Description
3
Overcurrent Protection
4
Overcurrent Tripping Characteristics
5
Types of Tripping
6
Faults and Causes
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DISTRIBUTION
Molded Case Circuit Breakers & Earth Leakage Circuit Breakers
Technical information
62D4-E-0058
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Chapters
Environment and Usage Precautions
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Operating Characteristics 2 and Performance Chapter
9
Selection and Application 3
35
Environment and Usage 4 Precautions Chapter
91
Maintenance Inspections 5
97
Table of Contents
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