Learn Line Protection Panel Schematics

Understanding Line Protection Panel Schematics: A Comprehensive Course

This course provides a deep dive into the schematics of line protection panels, specifically focusing on 132 kV systems. Gain practical knowledge essential for power system professionals.

About Your Trainer:

Learn from an expert with 21+ years of experience in power systems. Your trainer has extensive experience in:

• Operation & Maintenance of high-voltage equipment
• Erection & Testing of substation infrastructure
• Project Management and Consultancy
• Substation Automation and SCADA systems
• Commissioning of power generation and transmission projects

With a background working with organizations like Siemens Saudi Arabia and involvement in over 20 high-voltage substation projects across Pakistan and Saudi Arabia, you'll benefit from real-world insights. Expertise includes:

• Protection Systems design and implementation
• Substation Automation Systems (SAS)
• High Voltage Switchgear
• Protection Relays and control schemes
• Testing & Commissioning of electrical infrastructure

This training is designed with clear schematics and downloadable resources to enhance your understanding.

Course Topics:

• Schematic Fundamentals:
  • Understanding title page structure (rows, columns)
  • Inter-panel loop tracking
  • Drawing revision control
  • Drawing approval processes
  • Understanding drawing numbers
  • Bay number assignment
  • Object addressing
  • Decoding ordering codes, origin, and manufacturer information
• Graphical Arrangement (GA) Drawings:
  • Interpreting details provided in GA drawings
  • Color coding conventions (wire size, relay types, alarms, annunciation)
  • Importance of GA drawings during design, commissioning, and maintenance. (e.g., Generally, control wiring is grey, CT VT wiring RYB, trip ferrule in red color etc.)
• Symbols & Legends:
  • Decoding symbols for: CT, VT, Relays, Auxiliaries, push buttons, load break switches, power contacts of circuit breakers (CB), and limit switches.
• Relay and Metering Diagrams:
  • Understanding relay representation on Relay & Metering (R&M) diagrams.
  • Comprehensive overview of protection schemes.
  • Core principles of Current Transformers (CTs)
  • Tripping circuits and trip/lockout mechanisms.
  • CT and its cores: Primary and secondary side polarity, star point explanations (towards line and bus).
  • Impact of incorrect star point settings in distance protection.
  • Metering core circuits.
• Protection Philosophy:
  • Detailed explanation of protection system philosophy.
  • Relay functions:
    • 86 Relay: Function and application
    • 94 Relay: Function and application
  • Battery fault current and current transformer (CT) operation.
  • Lock Relay 86 and Tripping Relay 94 usage scenarios.
• Auto Reclosing & Tripping:
  • Auto reclosing and tripping circuit operation.
  • Permissive trip signals.
  • Distance protection current transformer connections.
  • Backup overcurrent protection connections.
  • Tripping schemes for line protection panels.
• AC & DC Power Systems:
  • AC Supply circuit components (AC Socket, AC light, AC lighting and heating, annunciation).
  • External and internal panel drawings symbols.
  • MCB connections (ODD & EVEN terminals, arrow and square symbol meanings).
  • AC Loop failure indication and annunciator circuits.
  • DC Supply Circuit: DC supply changeover circuit and redundancy.
  • Understanding dash-dot lines in drawings.
  • DC supply changeover circuit operation during supply failure.
  • Loop concepts in drawings and loop naming conventions.
  • DC supply and loop supervision – differences and tracking methods.
  • Shorting facility of CT circuits and its importance.
• Test Block Procedures:
  • Understanding and utilizing test blocks.
  • Injecting current through testers.
  • Relay power supply connection and watchdog contacts.
  • Test block contact 13-14 for relay powering up.
  • Relay power-off procedure upon test plug removal.
• Trip & Lockout Relays:
  • Distinction between tripping and lockout relays.
  • Resetting lockout relays (mechanical & electrical).
  • Binary input circuits of relays.
  • Operation of lockout relays.