Mastering Medium Voltage Schematics Episode 03

Mastering Medium Voltage Schematics: Advanced Training

This comprehensive online course, Part 03 of the Mastering Medium Voltage Switchgear Drawings series, provides in-depth knowledge of medium voltage schematics, progressing from fundamental concepts to advanced applications. Gain practical, hands-on skills essential for professionals working with electrical infrastructure.

About Your Trainer:

Benefit from over 21 years of experience from a seasoned expert in power systems. Your trainer has extensive expertise in operation & maintenance, erection, testing, project management, consultancy, supervision, substation automation, SCADA, and commissioning. With a background encompassing power plants, high voltage substations, and HVDC installations, he has collaborated with leading organizations like Siemens Saudi Arabia. He has successfully managed over 20 high-voltage substation projects across Pakistan and Saudi Arabia.

His specialized knowledge includes:

• Protection Systems: Deep understanding of various protection schemes.
• Substation Automation Systems: Expertise in designing and implementing automated substation solutions.
• Power Generation Systems: Design, testing, and commissioning of power generation systems.
• High Voltage Switchgear: Comprehensive knowledge of HV switchgear design, testing, and commissioning.
• Protection Relays: Expertise in the application and configuration of protection relays.
• Control Schemes: Development and implementation of robust control schemes.

He has a proven track record of leading testing and commissioning teams for industrial clients, including steel and petrochemical industries.

Course Topics:

This course delves into critical aspects of medium voltage switchgear schematics, including:

• Trip Circuits:
  • Trip Command and Logic Tables: Understanding and interpreting trip logic.
  • Trip Coil Save Scheme: Implementing reliable trip coil saving mechanisms.
  • Anti-Slam Scheme: Preventing unnecessary circuit breaker arcing.
  • Trip Free Scheme: Ensuring reliable trip operation.
  • CB Trip Control: Local, Remote, Emergency, and OFF control schemes.
  • Tripping from Local/Remote/Emergency: Understanding various trip initiation methods.
  • Trip Coil 1 & 2 Circuit: Configuration and operation of dual trip circuits.
  • Tripping from OC Relay: Utilizing overcurrent relays for trip signals.
  • Tripping from BB Relay: Employing backup-backup relays for enhanced reliability.
  • Tripping from UV/UF Relay: Using undervoltage/overvoltage relays for protection.
  • Trip Circuit Supervision Relay: Monitoring the health and status of trip circuits.
• DC Power Supplies:
  • Sold DC, Ghost DC, Return DC: Understanding different DC power supply configurations.
  • Concept of Ghost/Fake DC, Solid DC & Return Negative/Positive Supplies: Troubleshooting DC power issues.
  • What is Solid DC? Understanding solid DC power.
  • What is Return Negative or Positive? Understanding DC return paths.
  • Use of Test Lamp: Effective troubleshooting with test lamps.
• Relay Technology:
  • ABB TCS Relay: Understanding ABB's Time Delay Relay (TDR) technology.
  • MVAX 11, 12, 13 TCS Relays: Detailed analysis of MVAX series protection relays.
• Circuit Breaker Interlocks & Supervision:
  • Indication Circuit: Understanding relay indication circuits.
  • Binary Input Circuit: Working with binary input signals.
  • Loop Supervision: Detecting faults in loop circuits.
  • DC Supply Supervision: Monitoring DC power supply health.
  • Interlocking of OG Feeder with Earth Switch: Ensuring safe grounding procedures.
  • Trip Circuit Supervision Alarm and Close Block Logics: Implementing safety interlocks.
  • Each TCS Create Alarm: Understanding alarm generation from TCS.
  • Concept of CB Close Block: Preventing circuit breaker closure when TCS fails.
  • When to Monitor Healthiness of TC: Determining when to check trip circuit integrity.
• TCS Supervision Relay SPER 1C1:
  • Continuous Monitoring: Real-time monitoring of circuit breaker trip circuits.
  • Preset Operate Time: Preventing nuisance alarms.
  • LED Indication: Visual indication of relay operation.
  • Fault Detection: Identifying bad contacts, contact welding, and auxiliary voltage failures.
• TCS Supervision Relay MVAX12: Advanced