LORENZO A. TAGANAS JR.
Dubai
Summary
Experienced Power Supply Team Leader with over 20 years in railway power systems and electrical maintenance. Expertise in operation, maintenance, and troubleshooting of 33kV, 750V DC, 400V AC, and 110V DC systems within the Dubai Metro. Proficient in fault analysis, relay testing, and managing multidisciplinary teams to uphold safety and operational standards.
Overview
29
29
years of professional experience
1
1
Certification
Work History
Power Supply Team Leader
KEOLIS MHI Rail Management and Operation
Dubai
09.2021 - Current
- Lead and supervise Power Distribution System (PDS) maintenance teams across Dubai Metro Red and Green Lines.
- Manage preventive and corrective maintenance activities for all traction power and auxiliary power assets.
- Perform fault investigation and rectification of: 33kV GIS Switchgear, 750V DC High-Speed Circuit Breakers (HSCB), MV and DC Power Cables, Transformers, Positive and Negative Isolators, LV Distribution Systems, OVPD Protection Systems.
- Conduct protection relay setting upgrades and functional testing.
- Carry out current and voltage simulation tests for protection verification.
- Download, analyze, and trend rail potential and stray current monitoring data.
- Support engineering teams in technical investigations and system improvements.
- Ensure compliance with safety procedures, operational requirements, and maintenance standards.
- Successfully led numerous fault investigations and restoration activities, minimizing service disruption to metro operations.
- Managed major cable replacement, cable laying, and commissioning activities throughout the Dubai Metro network.
- Supported system reliability improvements through detailed fault analysis and protection system testing.
Promoted Power Supply Senior Technician
Serco Middle East
Dubai
07.2018 - 09.2021
- Manage preventive and corrective maintenance activities for all traction power and auxiliary power assets.
- Conducted preventive maintenance of 33kV switchgear and transformers.
- Performed maintenance and testing of 750V DC HSCB systems.
- Maintained UPS systems and auxiliary power supplies.
- Conducted insulation resistance testing and condition monitoring.
- Calibrated and commissioned protection relays and transducers.
- Performed corrective maintenance and fault rectification of traction power equipment.
- Executed testing and maintenance of BRU Chopper Units and rectifier systems.
Power Supply Technician
Serco Middle East
Dubai
11.2011 - 07.2018
- Conducted preventive maintenance of 33kV switchgear and transformers.
- Performed maintenance and testing of 750V DC HSCB systems.
- Maintained UPS systems and auxiliary power supplies.
- Conducted insulation resistance testing and condition monitoring.
- Calibrated and commissioned protection relays and transducers.
- Performed corrective maintenance and fault rectification of traction power equipment.
- Executed testing and maintenance of BRU Chopper Units and rectifier systems.
Substation Operator (SSO)
MHI Heavy Industries Dubai Metro Project
Dubai
03.2009 - 10.2011
- Operated and monitored Main Power Substations (MPS).
- Coordinated with Power Controllers during testing and train trial operations.
- Performed testing and commissioning of: 33kV GIS Switchgear, 750V DC Traction Systems, Transformer and Rectifier Systems, 110V DC Control Systems.
- Conducted switching operations and equipment inspections.
- Served as First Line Response Team (FLRT) Power Technician.
Industrial Electrician Leadman
Concord Elect Corporation
Dubai
11.2008 - 03.2009
- Supervised electrical installation activities.
- Managed cable tray installation and cable pulling works.
- Performed power and control cable termination.
- Conducted loop checking and insulation resistance testing.
Industrial Electrician Leadman
RNS Power System
Cebu
11.2004 - 10.2007
- Led installation of cable trays, conduits, and electrical wiring systems.
- Performed LV cable termination and electrical equipment installation.
- Supervised electrical workforce and project activities.
Assistant Heavy Equipment Operator
Government of Iligan City
Iligan City
07.2001 - 06.2004
- Operated equipment such as Bulldozer (D65, D75), Backhoe, Power Shovel, Dump Truck, Bomb Truck, and various light vehicles.
Industrial Electrician / Low Voltage Terminator
Communication Technology Philippines Inc.
02.1997 - 09.1998
- Completed termination of power and control cables, enhancing equipment functionality and reliability.
- Carried out termination of instrumentation cables for precise measurement systems.
- Executed electrical installations in residential and commercial settings, ensuring compliance with safety regulations.
- Installed panel boards for efficient electrical distribution in buildings, supporting operational needs.
- Installed street lighting and aviation warning lights for improved safety and visibility.
Education
Electrical Engineering Technology -
Mindanao State University
Marawi City, Philippines01-1991
Skills
- Railway Power Supply Systems
- 750V DC Traction Power Systems
- 750V DC Traction Power Supply System
- High-Speed Circuit Breakers (HSCB)
- Transformer Maintenance and Testing
- Rectifier Transformers
- Protection Relay Testing and Calibration
- Protection and Testing
- Secondary Injection Testing
- Insulation Resistance Testing
- Contact Resistance Testing
- Earth Resistance Testing
- Functional and Operational Testing
- Fault investigation
- Fault diagnostics
- MV/LV Cable Installation and Termination
- Switching Operations and Substation Control
- Preventive maintenance
- Stray current monitoring
- Power Systems
- Auxiliary Power Supply Systems
- UPS Systems
- LV Distribution Panels
- MV and DC Cable Systems
- PDS maintenance
- Omicron CMC 356
- Megger S1 Studio
- Insulation Resistance Tester (Megger)
- Digital Multimeter
- Clamp Meter
- Earth Resistance Tester
- Contact Resistance Tester
- Current and Voltage Injection Test Sets
- Safety assessment
- Technical reporting
- Team leadership
Languages
English
Tagalog
Cebuano
Visayan
Technical Skill / Expertise:
33kV GIS Switchgear, 750V DC Traction Power Supply System, Rectifier Transformers, Auxiliary Power Supply Systems, UPS Systems, LV Distribution Panels, 110V DC Battery Chargers, Positive and Negative Isolators, BRU Chopper Units, MV and DC Cable Systems, Protection Relay Testing and Calibration, Current and Voltage Injection Testing, Secondary Injection Testing, Insulation Resistance Testing, Contact Resistance Testing, Earth Resistance Testing, Functional and Operational Testing, Fault Diagnostics and Root Cause Analysis, Omicron CMC 356, Megger S1 Studio, Insulation Resistance Tester (Megger), Digital Multimeter, Clamp Meter, Earth Resistance Tester, Contact Resistance Tester, Portable Appliance Tester (PAT), Live Line Voltage Tester, Current and Voltage Injection Test Sets
References
- Engr. Roberto Sarmiento HV Power System Manger Mobile No. +971504574519
- Engr. Muhammad Ans Keolis PDS Engr. Mobile No. +971569922455
- Engr. Salvador Bibar Keolis PDS Engr. Mobile No. +971545839250
Certification
- Certificate of Competence Keolis MHI On-Call
- Certificate of Completion SEL BCU for RTA 33kv Substation
- Certificate ABB ELSE Protection Relay
- Certificate Microelectrica Scientifica UMLEs Protection Relay MHCO transducer
- Certificate NAJMA Consultancy Hot Work Awareness
Timeline
Power Supply Team Leader
KEOLIS MHI Rail Management and Operation
09.2021 - Current
Promoted Power Supply Senior Technician
Serco Middle East
07.2018 - 09.2021
Power Supply Technician
Serco Middle East
11.2011 - 07.2018
Substation Operator (SSO)
MHI Heavy Industries Dubai Metro Project
03.2009 - 10.2011
Industrial Electrician Leadman
Concord Elect Corporation
11.2008 - 03.2009
Industrial Electrician Leadman
RNS Power System
11.2004 - 10.2007
Assistant Heavy Equipment Operator
Government of Iligan City
07.2001 - 06.2004
Industrial Electrician / Low Voltage Terminator
Communication Technology Philippines Inc.
02.1997 - 09.1998
Electrical Engineering Technology -
Mindanao State University