At Purna we bring deep expertise in E&I built on decades of experience working with complex industrial processing facilities. Our specialist teams understand the demanding nature of power systems, automation and instrumentation in modern plants and work closely with clients to design, optimize and enhance facilities with precision and safety.
We deliver end-to-end E&I engineering services from Concept, Basic design and Detailed Engineering to procurement support and commissioning documentation, ensuring seamless integration across all plant systems.
Electrical Engineering capabilities
Design & Engineering
- Electrical system design and detailed engineering
- Basic engineering, feasibility studies, DPRs and pre-tender engineering
- Equipment sizing & selection
- Earthing system design, lightning protection and illumination engineering
- HV/EHV substations, transmission line design and substation automation
Instrumentation Engineering Capabilities
Design & Documentation
- Instrumentation control system block diagrams
- Loop diagrams
- Electrical GA drawings
- Hook-up drawings
- Instrument specifications and datasheets
- IO lists and junction box schedules
- Cable routing & cable schedules
- Control system architecture design
- 3D modelling of cable trays, instrument panels & layouts
Documentation & Drawings
- Single Line Diagrams (SLDs)
- Cable schedules & cable routing
- Electrical GA drawings
- 3D modelling for electrical layouts
- Hazardous area classification drawings
- Wire harness design and wiring diagrams
- Bill of Materials (BOM/MTO)
- BOQ preparation and cost estimation
Engineering & Project Support
- Basic & detailed engineering for instrumentation systems
- Pre-feasibility, feasibility & DPR development
- BOQ preparation & cost estimation
- Tender preparation, evaluation & procurement assistance
Instrumentation Engineering Services
Our Instrumentation Engineering team provides complete design and documentation support for automation, control systems, and instrumentation hardware across industries:
Design & Documentation
- Instrumentation control system block diagrams
- Loop diagrams
- Hook-up drawings
- Instrument specifications and datasheets
- IO lists and junction box schedules
- Cable routing & cable schedules
- Control system architecture design
- 3D modelling of cable trays, instrument panels & layouts
Engineering & Project Support
- Basic & detailed engineering for instrumentation systems
- Pre-feasibility, feasibility & DPR development
- BOQ preparation & cost estimation
- Tender preparation, evaluation & procurement assistance
Procurement & Support
- Purchase specifications, tendering & vendor evaluation
- Vendor drawing review
- Procurement assistance
- Retrofit, modernization and renovation studies
Engineering Studies
- Load flow studies
- Short circuit & motor starting studies
- Relay coordination
- Arc-flash studies
- Failure analysis
- Advanced protection system design
