Umair Khan

•Name of assignment or project & Location: Up-gradation of Tarbela existing switchyard(500/220/24kV substation), Tarbela dam, Pakistan
Cost of Project: $. 25 Million
Date of Start: August 2016 Date of Completion: To-date
Actual Time Spent on the Project: 8 months
Employing Organization: Associated Consulting Engineers - ACE (Pvt) Ltd.
Client: WAPDA
Client Information: Mr.Sohail Khan, CE/PD, T4thHP, Old HPD Building, Project Office Tarbela, Tarbela Dam Project, Contact #: 0938-281175.
Main project features: After the completion of Tarbela 4th extension, 1410MW will be added to the system, due to which the short current rating of system will jump from 43kA to 50kA. For that purpose all the equipment in switchyard including will be upgraded to 63kA i.e
o 500kV Bus bars and its supports
o 500kV Current transformer
o 500kV Circuit breaker
o 500kV Disconnect Switches
o 3x150MVA Auto-Transformer
o Surge arrestors
o Auto transformer protection
o Circuit breakers protection
o Bus Bar protection
o SCADA system
o Sergi system
Positions held: Junior Engineer Electrical
Activities performed:
• Review for approval of 500kV circuit breaker(Outline, design calculation, technical data sheet, layout).
• Review for approval of 500kV Disconnect switch (Outline, design calculation, technical data sheet, layout).
• Review for approval of 500kV Current transformer(Outline, design calculation, technical data sheet, layout).
• Review for approval of 500kV Post Insulator(Outline, design calculation, technical data sheet, layout).
• Review for approval of Surge Arrestor(Outline, design calculation, technical data sheet, layout).
• Review for approval of 450MVA Auto-transformer(Outline, design calculation, technical data sheet, layout).
• Review for approval of 500kV and 220kV protection and metering single line diagram.
• Review for approval of 500kV breaker failure protection system.
• Review for approval of 500kV Bus Bar failure protection system.
• Review for approval of 450MVA Auto transformer protection system.
• Review for approval of 450MVA Auto transformer fire protection system.
• Review for approval of Short circuit calculation and load losses of 450MVA Auto transformer.
• Attending co-ordination meeting with contractor and client.
• Prepare daily, weekly fortnightly, monthly and per-yearly report writhing.
• Drafting of letters to the Client and Contractor.
Protection systems(500/220kV switchyard):-
• Review for approval of 500kV breaker failures protection schematic drawings of ½ Bus Bar scheme.
• Review for approval of 500kV Bus Bar protection schematic drawings of ½ Bus Bar scheme.
• Review for approval of Transformer protection schematic drawings of ½ Bus Bar scheme.
500/220kV switchyard Site Activity:-
• Supervision of dismantling of auto-transformer structure.
• Supervision of dismantling of 500kV current transformer structure.
• Supervision of dismantling of 500kV Disconnect Switch structure.
• Supervision of dismantling of 500kV post insulator structure.
• Supervision of dismantling of 500kV surge arrestor structure.
• Supervision of dismantling of 500kV Bus Bar structure.
• Supervision of dismantling of 500kV breaker Failure protection panels, relays and structure.
• Supervision of dismantling of 500kV Bus Bar Failure protection panels, relays and structure.
• Supervision of dismantling of 500kV Transformer protection panels, relays and structure.

-Name of assignment or project & Location: Tarbela 4th Extension(1410MW) Hydro power project, Tarbela Dam.
-Cost of Project: $.910 Million
-Date of Start: March 2015 Date of -Completion: July 2016
-Actual Time Spent on the Project: 4 year
-Employing Organization: Mott MacDonald Pakistan .
Client: Wapda
Client Information: Mr.Sohail Khan, CE/PD, T4thHP, Old HPD Building, Project Office Tarbela, Tarbela Dam Project, Contact #: 0938-281175
-Main project features: Tarbela dam have 5 number of tunnels, in which 3 numbers are already used for the generation of max. 3478 MW. Now on tunnel 4th 1410MW power plant has been installing which have 3 units, and also construction of 500kV switchyard interface with existing 500/220kV switchyard.

-Position held: Junior Engineer Electrical

-Responsibilities And Achevments:
Tarbela 4th extention HPP, Power house and Switchyard(Site activities):
• Reviews of Electrical design/Quality documents.
• Daily site visit and inspection of ongoing earthing system installation.
• Electrical equipment installation inspection.
• Participate in daily Electro-Mechanical meeting.
• Inspection of Contractors 11kV construction power supply installation.
• Communicating with client and contractors.
• Provides engineering information by answering questions and requests.
• Preparing daily E&M site progress report, fortnightly E&M progress report, Weekly E&M
progress report.
• Visual inspection of Electrical equipment’s in E&M contractor ware house.
TESTS:
Following test has been conducted for 600/50 ton Powerhouse overhead crane:
• Supervision of IR test for 4kW, 11kW, 55kW and 132kW motors.
• No load test has been conducted for Main and auxiliary hoist system.
• Frequency, current and voltage test for ABB frequency drives.
• Load test has been conducted for load of 50%, 75%, 100%, 125% and 140% on main hoist
system.
• Load test has been conducted for load of 50%, 75%, 100%, 125% and 140% on auxiliary hoist
system.
• Insulation Resistance Test and Winding Resistance test have been conducted for all motors
rating i.e. (18.5kW, 3kW and 0.8KW) of 10tone Electrical hoist system of Powerhouse
overhead cranes.
Upgradation of Tarbela exsisting switchyard(500/220/24kV substation):
• Bid elevation of upgradation of existing Switchyard project
• Reviews of Electrical design/Quality documents
Tool (AUTOCAD-2013)
• Drawn the SLD of 500/220kVA Auto Transformer Metering/Protection.
• Drawn Main SLD of 500kV Substation.
• Drawn the Bus Bar and breaker failure protection of 500kV Substation.
5
Tarbela 5th
Extension HPP, Tarbela Dam:
• Specification document and drawings for construction power supply (i:)11 kV switch gear and
Cables (ii:) 500 kV transformer
• Tool (AUTOCAD-2013)
• Drawn the Main Single Line Diagram.
• Drawn the Auxiliary power System single line Diagram.
• Drawn the Main Single Line Diagram of protection and metering.
• Drawn the Power house 400V UNIT Auxiliary Board.
• Drawn the Control Building UPS Board.
• Drawn the Powerhouse 48V and 220V DC Battery Board.
• Drawn the Control building 48V DC telecom PTCL PABX battery board.
• Drawn the 48V