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Fuses, Circuit Breakers, and Overloads

Fuses, Circuit Breakers, and Overloads

Yogyakarta | 30 April-03 May 2012 | IDR 7.000,000.00 per participant
Yogyakarta | 03-06 September 2012 | IDR 7.000,000.00 per participant
Yogyakarta | 17-20 December 2012 | IDR 7.000,000.00 per participant

DESCRIPTION

Fires and equipment damage due to electrical faults or overload can be prevented by proper electrical device application. Protective devices, such as fuses and circuit breakers, must be sized to both isolate and limit short circuit faults. Improperly applied protective devices can explode under these same conditions. Overload protective devices are required in almost every motor circuit, yet one of the most common causes of motor failure is overload. The student will be equipped to make decisions that are prudent, yet still assure plant protection.

WHO SHOULD ATTEND

  • Engineering and design personnel
  • Maintenance and technical services personnel
  • Process and operations personnel
  • Technical and process managers
  • Engineering and design personnel
  • Electrical consulting engineers
  • Electrical contractors

SUMMARY OUTLINE

1.    Short Circuits vs. Overloads

  • Limiting the Effects of Short Circuits
  • Equipment Fault Current Ratings
  • The X/R Ratio as stated in the National Electrical Code?
  • “Back-of-envelope” Short Circuit Calculations

2.    Low Voltage (less than 1000 volts) Fuses

  •  Fuse Construction and Fuse Types
  • UL Fuse Classes and Voltage Ratings
  • Sizing Fuses for Industrial Circuits
  • Time Vs. Current Characteristics for Fuses
  •  Device Selectivity
  •   Classroom Exercise

3.    Molded Case Circuit Breakers

  • Circuit Breakers vs. Fuses
  • Circuit Breaker Components
  • Molded Case Breaker Trip Types
  • The Reasons for Fused Breakers
  • Key Requirements when Replacing a Breaker
  • Testing Breakers – Overcurrent and Megohm Tests
  • Classroom and Exercises
  • Breaker Ratings
  •  Symmetrical and Asymmetrical Fault Current

4.    Motor Overload Protection

  • Motor Losses and Heating
  • Insulation Class and the Insulation Life Formula
  • The Motor Destruction Curve
  • Thermal Overload Protection in a Motor Circuit.
  • Three Types of Protection
  • Overload Protection Types
  • Internal Protection
  • Bimetallic, Solder-Ratchet, and Electronic Overload Relays
  • Ambient Compensation
  • Sizing Motor Overload Heater Elements
  • Classroom Exercise and Field Demonstrations
  • Protective Device Coordination

METHODE

  • Discuss
  • Case Study
  • Evaluation
  • Simulation

INSTRUKTUR

Teguh Santoso, Ir
Teguh Santoso experienced more than 26 years in Electrical.

TIME & VENUE

  • Yogyakarta
  • 30 April-03 May 2012
  • 03-06 September 2012
  • 17-20 December 2012
  • 4 days – 08 am – 04 pm

COURSE FEE

IDR 7.000,000.00 per participant non residential

FACILITY

  • Module / Handout
  • Certificate
  • Souvenir
  • Training Kit

 

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Posted in: Electrical, Yogyakarta

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