Learn Line Protection Panel Schematics
What you'll learn
- Line Protection Panel Schematics
- AC,DC Loop
- Supply Changeover circuit
- CT & VT circuit
- Trip Circuit, Close Block, Lockout circuit
- Basics of electrical
Welcome to the course of understanding schematics of "Line Protection Panel Schematics". This course covers complete schematics of 132 kV Line protection panel.
Trainer have over 18 years of field experience and has worked at 11/132/220/500kV Substation, 1263MW power plant, 660kV HVDC system. worked with several companies, SIEMENS, ABB, GE, SEC, KE, WAPDA, NTDC, ARAMCO, SABIC, MARAFIQ. Trainer has given hundreds of trainings online and offline, so it will be great to join this training and take advantage of field experience.
This training is designed over as schematics, that will also be available to download.
Topics covered in this training are as follows,
Introduction to title page
How page is divided in rows and columns
How to track inter panel loops
Drawing Revision No, Philosophy
Drawing approval stages
Why two ratings of transformer are mentioned on drawings
Understanding Drawing number
How Bay numbers are assigned
How to define address of object at the page
How to read list of content
Ordering code , Origin, Make of items
Details provided in GA drawings
Color coding, wire size, relay types, alarm, annunciation details, why GA drawing are important during design and commissioning stage / Maintenace stage
Generally, control wiring is grey, CT VT wiring RYB, trip ferrule in red color etc.
Understand symbols & legends
Symbol of CT, VT, Relays, Aux, push button, Load break switch, power contact of CB, limit switch etc
Relay and metering diagram
How relays are shown on R&M diagram, all protection schemes, core of CT's, tripping circuit, trip & lockout
CT and its cores
CT Polarity at primary and secondary sides
CT star point explanation
Towards line and towards bus star point
What is effect of wrong star point settings in distance protection
Protection and metering cores
Metering core circuit
Protection core circuit
Explained Philosophy of Protection system
Lock Relay 86
Tripping Relay 94
When to use 86 and where to use 94 relay in scheme.
Auto Re-closing and tripping circuit
Permissive trip siganl
Distance protection current transformer connection
Backup over current protection connections
Tripping scheme of line protection panel
List of Apparatus
AC Supply circuit, AC Socket, AC light, AC lighting and heating, annunciation
External and internal panel drawings symbols
MCB connections, where to connect ODD & EVEN terminals
What mean by arrow signs & square shows for MCB symbol
AC Loop failure indication
AC annunciator circuit
DC Supply Circuit
DC supply change over circuit
Redundancy of DC supply explained & why it is provided
What mean of dash dot lines in drawings
How dc supply change over circuit works if one supply fail.
What is loop in drawings and naming of loop
Understand DC supply supervision & loop supervision, what is difference between them
Tracking loop across drawings and check till end
Shorting facility of CT circuit
Why CT circuit should be short circuited all the time & must never be open circuited
Explained Test Block, Use of test block
How to inject current through tester
Relay power supply connection
Relay watch dog contact
Test block contact 13-14 for relay powering up.
test plug cover when removed relay is powered off.
Difference between tripping and lockout relays
How to reset lockout relays, mechanical & electrical reset
Binary input circuit of relays
Operation of lockout relays
Circuit of Tripping and lockout relays
Complete details of contacts of lockout relays
Trip Coil 1 & 2 circuit
Breaker Failure initiation
Trip circuit supervision relay
Supervision relay working when circuit breaker is in open / close position
Close Block feature, why its is required, circuit of close block
Alarm and SCADA circuit
Device detail & panel layout.
Who this course is for:
- students, technicians, engineers
Elite Engineering is an engineering academy that is formed by professional with experience in the field of electrical, substation, power transformers, power plants, transmission lines, project management, errection, installation & testing & commissioning.
Trainers have up to 20 years of field experience at various voltage levels starting from low voltage, 11kV, 33kV, 66kV, 132kV, 220kV, 380kV, 500kV AC system & 660kV HVDC voltage level.
Experienced gain while serving in Middle East, EU, South Asia while serving several companies like Saudi Electricity, Saudi Aramco, SABIC, Marafiq, Siemens, ABB, Alstom, AREVA.
Excellent knowledge and delivering the theory and practical concept with such an ease.
Trainer possesses strong competency in power plant and substation secondary system, scheme like busbar protection, breaker failure protection, substation automation, transformer differential, substation schemes lines/transformer/reactor/busbar, testing & commissioning of relays, scheme testing, testing of GIS/AIS substation equipment, testing of generator protection, on site trainings.