Fuji Electric BW100EAG Technical Information

Fuji Electric BW100EAG Technical Information

Molded case circuit breakers & earth leakage circuit breakers
Table of Contents

Advertisement

DISTRIBUTION
Molded Case Circuit Breakers & Earth Leakage Circuit Breakers
Technical information
62D4-E-0058

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the BW100EAG and is the answer not in the manual?

Questions and answers

Summarization of Contents

Protecting low-voltage circuits
Description
Overview of common low-voltage circuit faults like overcurrent and phase-loss.
Overcurrent protection
Explanation of how MCCBs protect against overload and short-circuit currents.
Phase-loss protection
Details on protecting motors from phase-loss faults to prevent winding burnout.
Operating characteristics and performance
Overcurrent tripping characteristics
Explains different types of overcurrent tripping mechanisms and factors affecting them.
Breaking performance
Covers short-circuit current breaking, let-through current, and arc space requirements.
Overload switching performance
Details on overload switching test conditions and performance criteria.
Performance with current at 100%
Discusses temperature rise and internal resistance/power consumption at rated current.
Durability
Covers switching durability, trip switching durability, and accessory durability.
Withstand voltage performance
Details on power frequency and impulse withstand voltage tests.
Handle operating force and angle
Provides data on handle operating force and angle for different breaker types.
Selection and application
Selection check points
Outlines key factors to consider when selecting MCCBs for various applications.
Cascade trip applications
Explains conditions and criteria for cascade (backup) trip coordination.
Selective trip applications
Discusses selective trip coordination between breakers and with high-voltage side devices.
Wiring protection
Covers protection of wiring against overcurrents and thermal effects.
Motor circuit applications
Details on protecting motors from overcurrents during starting and operation.
Applications on the primary side of transformers
Covers inrush current and MCCB selection for transformer primary circuits.
Welder circuit applications
Discusses characteristics of welder circuits and MCCB selection for arc and resistance welders.
Selecting an MCCB for capacitor circuit
Highlights capacitor circuit characteristics and MCCB selection criteria.
MCCBs for semiconductor circuit
Addresses faults, overcurrents, and MCCB selection for circuits with thyristors and diodes.
Protecting SSCs using MCCBs or MMSs
Recommends combinations of MCCBs/MMSs for protecting Solid State Contactors (SSCs).
Protecting inverter circuits using MCCBs
Explains how MCCBs protect inverter circuits from power supply overcurrents.
MCCBs for high frequency circuits
Notes limitations of MCCB types for 400Hz circuits and recommendations.
MCCBs for DC circuit applications
Details on MCCB application in DC circuits and operating characteristic changes.
MCCBs for UPS applications
Provides guidelines for selecting MCCBs for UPS systems, considering overload withstand.
MCCBs for servo amplifier applications
Lists MCCB types suitable for servo amplifier power supply switching and protection.
Ground fault protection in system applications
Discusses grounding systems and ground fault protection methods.
Environment and usage precautions
Standard conditions
Lists standard operating conditions for FUJI MCCB performance according to IEC 60947-1.
Application to special environments
Covers considerations for high-temperature, high-humidity, cold climate, and high altitude applications.
Connection precautions
Addresses reversed connection and proper tightening torque for conductors.
Malfunction due to transient inrush current
Explains how to prevent MCCB malfunction caused by transient inrush currents.
Maintenance inspections
Faults and causes
Details common faults during MCCB operation and their countermeasures.
Periodic inspections
Provides guidelines for initial, periodic, and post-overcurrent tripping inspections.
Replacement recommendations
Offers guidance on MCCB deterioration diagnosis and replacement based on durability.
Short-circuit current calculation
Calculating short-circuit current
Explains the objective and formulas for calculating short-circuit current in three-phase circuits.

Table of Contents

Save PDF