Job Overview :

We are seeking an experienced Manager - Substation Design (EHT - Extra Hight Tension Systems) Design to Lead end-to-end design, conceptualization, engineering, develop layouts, SLDs, DC Campus load estimations, technical specification / scope for SITC of equipment / build items support site team Construction and commissioning for 110 kV, 220 kV, and 400 kV AIS & GIS substations, Power Transformers, SCADA and

Medium Voltage (MV) systems. The ideal candidate will be proficient in sound EHV experiences in Design, system studies using ETAP, tech-

nical RPF documents vetting and bid evaluations, regulatory compliance in line with CEA & CEIG regulations, state Utilities norms, protection schemes, Root cause analysis and troubleshooting.

Main Responsibilities:

Key Responsibilities & Technical Aspects,

- EHT Substation Design & Engineering:
- Optimized AIS & GIS Substation Layout Design:

o Selection of Single Bus, Double Bus, Main & Transfer Bus, One and Half Breaker, or Ring Bus configurations based on reliability requirements.

o GIS substation compact design requiring optimized SF6 gas compartments for isolators and circuit breakers.

o Logical placement of control & protection panels for effective relay coordination.

- Busbar Configuration Optimization:

o AIS: Rigid Copper/Aluminum tubular busbars with insulation strength optimization and short-circuit withstand capability.

o GIS: Fully enclosed SF6-insulated bus ducts, ensuring minimal footprint and arc containment capability.

- Insulation Coordination & Surge Protection:

o Implementation of metal oxide surge arresters (ZnO type) across busbars and transformer terminals.





o Shielding & grounding of control cables to minimize electromagnetic interference (EMI).

- Electrical Clearance Optimization:

o AIS: Phase-to-phase, phase-to-earth, and live equipment clearances adhering to IEC 60071 standards.

o GIS: Optimized compact SF6-encased bays reducing clearance requirements significantly.

- Large Power Transformers (110 kV, 220 kV, 400 kV) Design:
- Define voltage ratings, BIL (Basic Insulation Level), and dielectric strength.
- Specify vector groups (Dyn11, YNd1) for system harmonics mitigation.
- Configure cooling systems (ONAN, ONAF, OFWF, OFAF) for optimal thermal management.
- Adherence to unit protections system for large power transformers like sudden pressure, NIFPS.
- Develop tap changer strategies (OLTC, AVR integration) for voltage regulation.
- Implement Digital Monitoring Systems (SCADA, IoT) for predictive maintenance.
- System Studies & Protection Coordination:
- Conduct load flow analysis, short circuit studies, and relay coordination, arc flash study using ETAP.
- Implement differential, REF, overcurrent, differential and bus bar protection schemes.
- Evaluate transient stability, ferro resonance mitigation, insulation coordination and reactive power compensation.
- Regulatory Compliance & Adherence to CEA/CEIG Norms:




- Ensure full compliance with Indian electrical norms.
- Liaise with certification bodies and inspectors to secure approvals.
- Define risk mitigation strategies for regulatory deviations.
- Vendor Technical Bid Evaluations & Procurement:
- Develop , evaluate Project RFP documents and Assess vendor technical bids for EHT equipment, ensuring functional & commercial viability.
- Optimize material specifications, BOQ, and procurement strategies.
- Troubleshooting & Root Cause Analysis (RCA):
- Diagnose operational faults using thermal imaging, insulation resistance testing, and DGA.
- Implement failure analysis methodologies and corrective actions.
- Develop predictive maintenance strategies using digital diagnostics.
- Concept-to-Commissioning Leadership:
- Oversee design, engineering, installation, testing & support site level commissioning activities.
- Conduct Factory Acceptance Tests (FAT) & Site Acceptance Tests (SAT) for quality validation.
- Ensure multi-disciplinary coordination between stakeholders.

Skills & Competencies Required:
- Expertise in AIS & GIS technologies, Power Transformers, SCADA, Daignostics and MV panels.
- Advanced proficiency in ETAP for system modelling and protection analysis.
- Deep understanding of India's electrical regulatory framework (CEA, CEIG).
- Strong troubleshooting skills with hands-on RCA methodologies.
- Exceptional leadership and stakeholder collaboration abilities.

Preferred Certifications

- ETAP Advanced User Certification
- Power System Protection & Design Certification
- Substation Equipment Testing & Commissioning Certification

📌 Manager - Substation Design (Navi Mumbai)
🏢 Rainbow HR Consulting
📍 Navi Mumbai