Pandu Ranga Rao Marapakula
Hyderabad
Summary
Accomplished Senior Electrical Circuit Designer at TCMS Control Panel, specializing in TCMS architecture and safety-critical design. Enhanced reliability through innovative grounding techniques and effective mentoring of junior engineers. Proficient in load distribution calculations and adept at fostering continuous improvement, delivering designs with zero major safety deviations during testing.
Overview
15
15
years of professional experience
1
1
Certification
Work History
Senior Electrical Circuit Designer
TCMS Control Panel
- Current
- Lead the design and development of TCMS control panel electrical schematics based on system I/O lists, functional requirements, and safety classifications.
- Define power architecture including DC and AC load distribution, segregation of vital and non-vital circuits, and redundancy concepts to eliminate single-point failures.
- Perform detailed DC and AC load calculations, voltage-drop analysis, and derating to ensure reliable operation under worst-case conditions.
- Select and coordinate protection devices such as MCCB, MCB, MPCB, fuses, contactors, and relays ensuring selectivity and adequate breaking capacity.
- Implement fail-safe design using NC logic, line monitoring (EOL resistors), feedback supervision, and fault localization techniques.
- Define grounding, bonding, and DC return philosophies to meet EMC requirements and ensure personnel safety.
- Design DI, DO, AI, and AO interface circuits with isolation, surge suppression, and EMI protection.
- Integrate AC auxiliary systems including HVAC blowers, battery chargers, panel heaters, lighting, and service sockets.
- Prepare and maintain electrical documentation using E3.cable, including schematics, wiring diagrams, wire lists, and bills of material.
- Support design reviews, manufacturing, testing, commissioning, and troubleshooting activities.
- Mentor junior engineers and support continuous improvement in design practices.
- Delivered multiple TCMS control panel designs with zero major safety deviations during testing and commissioning.
- Improved reliability of safety-critical circuits through systematic voltage-drop validation and grounding improvements.
- Reduced field wiring and commissioning issues by implementing structured line monitoring and fault-localization practices.
Assistant Engineer
Medha servo drives(Manufacturing unit)
Hyderabad
02.2011 - 04.2018
- Participated in Final QC department to perform hardware functional validation on various train control and signalling system equipment.
- Hands on work experience with various electrical and electronic measuring equipment.
- Prepared manual test jigs for equipment validation.
- Conducted RITES inspection.
Education
DIPLOMA - Electrical / Electronics Engineering
Vijaya Sree Public School
Piduguralla, AP04-2010
Skills
- TCMS Control Panel Architecture & Design
- Vital / Non-Vital Circuit Segregation
- DI / DO / AI / AO Circuit Design
- DC (110V / 72V / 24V) & AC (230V / 415V) Systems
- Load Distribution & Voltage Drop Calculations
- Protection Coordination (MCCB, MCB, MPCB, Fuses)
- Fail-Safe & Safety-Critical Design Philosophy
- Grounding, Bonding & EMC / EMI Mitigation
- E3cable – Schematics, Wire Lists, BOM, Cross-Referencing
- Railway Standards Awareness (EN 50155, EN 50121, IEC 61373)
Accomplishments
• Developed VB scripts in view of time optimization and accurate output, to extract BOM content from the multiple wiring formats.
• Developed VB scripts in view of time optimization and accurate output, to compare two lists of data to get accurate material impact.
• Test procedure Template optimized to avoid non value added activity.
• I got Mandal first award in SSC annual results.
• Developed VB scripts in view of time optimization and accurate output, to compare two lists of data to get accurate material impact.
• Test procedure Template optimized to avoid non value added activity.
• I got Mandal first award in SSC annual results.
Professional Attributes
- Strong safety and reliability mindset
- Excellent cross-functional communication
- Design review and validation expertise
- Ability to work independently and lead design activities
Tools And Software
- E3.cable
- WPS Office / MS Excel
- AutoCAD (basic)
- Technical Documentation & Review Tools
Certification
Certified automation engineer
Projects involved
- Kolkata Metro
- Train-18 (Vande Bharat Trainset)
- Various types of AC EMUs(Under slung & On board)
- 3 phase AC loco Propulsion system (WAP & WAG variants)
- TCAS system (Kavach)
Timeline
Assistant Engineer
Medha servo drives(Manufacturing unit)
02.2011 - 04.2018
Senior Electrical Circuit Designer
TCMS Control Panel
- Current
DIPLOMA - Electrical / Electronics Engineering
Vijaya Sree Public School