LLC-302 | Maintenance Troubleshooting Int. LLC

Ladder Logic Circuitry: Including Ladder Drawing, Schematics and Controls

Electrical

Course Number: LLC-302

Course Description:

Class members learn how to read and troubleshoot complex electrical circuits using ladder diagrams and ladder logic. Before you open that control cabinet and don personal protective equipment, it makes better sense to review the ladder logic of the circuit and figure out what remote component is probably the offender keeping production or your facility down. This two-day course delivers an essential skill in the field of equipment maintenance, installation or modification: the ability to read and understand electrical ladder drawings, schematics and diagrams. The course covers several types of industrial control prints for a variety of different motor-driven processes, with an emphasis on the differences between type and the purposes and flow of each. Students will participate in exercises to create schematic diagrams based on circuit descriptions and will learn to interpret schematic drawings in order to provide verbal or written circuit descriptions.

Each student will receive class books, work activity sheets, self-test progress evaluations, as well as questions from the instructor to make sure they understand the material presented. It is expected that an attendee will leave the class with the basic knowledge of the subject and possess new found skills to better equip them when they return to their job. A certificate suitable for framing will be issued to each attendee who successfully completes the course.

Hands-on activities:
30% hands-on activities

Free Materials included:
Motor Circuits ($30)

2-day course: $1095 per person

Course Syllabus

GENERAL REQUIREMENT FOR ELECTRICAL SAFETY-RELATED WORK PRACTICES

Introduction, Types of Drawings and Symbols
Importance and Relevance of Dwgs.
Categories of Electrical Drawing and their Characteristics
Purposes served by Different Type of Electrical Drawings
International Electrical Symbols and Drawings
Component Symbols
- Wiring & Connections
- Power Source
- Breakers
- Disconnects
- Fuses
- Fuse Block
- Contactors
- Overloads
- Loads
- Grounds
- Others
Applications and Functions of Numerical Relays
Importance of CTs and VTs Information in Electrical Drawings

INTERPRETATION AND SIGNIFICANCE OF SINGLE LINE DIAGRAMS

Onset of a Single Line Diagram
Importance of Single Line Diagrams
Standardized Drawing Symbols
Protective Devices Coordination in Single Line Diagrams
Fault Current Calculations with Information from the Single Line Diagram
Troubleshooting and Electrical Installation with the Relevant Diagrams

LADDER DIAGRAMS INTERPRETATION

Types of Ladder Diagram
Generic Electrical Equipment Ladder Diagrams
Designing Control Circuits
Interlock Control Circuits
Protective Relays and Timers Ladder
Diagrams
Fail Safe Designs

SCHEMATIC AND CONTROL CIRCUITS

VFD Schematics and its Operation related to Controlling Circuits
UPS Power Supply Schematic Diagram Components Functionalities
Reading and Tracing AC Input Diagrams and its Significance
Identify Components in the Rectifier, Inverter and AC Outputs Schematic Diagrams
Types of Protection Relays Schematics, Wiring, Operation and Functional Diagrams
Motor Installation and Control Circuits