Experts in
Engineering Design
KUSUMA M M, B.A , M.B.A
MANAGING DIRECTOR
About us
We provide competency-driven solutions for substation Protection & Control (P&C) systems, delivering designs that are technically robust, compliant with industry standards, and aligned with client and utility requirements. Our engineering approach is founded on proven protection philosophies, sound system integration, and a deep understanding of secondary system behaviour.
Our expertise ensures reliable, safe, and efficient secondary systems by applying best-practice design principles across protection schemes, control logic, interlocking, and signal integrity. Each design is developed with careful consideration of operability, maintainability, and future expandability, ensuring seamless interaction between protection relays, control equipment, and primary plant.
We place strong emphasis on clarity, accuracy, and engineering excellence, producing high-quality documentation and designs that reduce commissioning risk and enhance operational confidence. By combining technical competence with practical site experience, we support long-term system performance, asset reliability, and compliance throughout the project lifecycle—from concept and detailed design through to implementation and operation.
Our Vision
To be a recognised and trusted provider of Protection & Control engineering solutions, delivering high-quality, industry-aligned secondary system designs that enhance power-system safety, reliability, and long-term operational performance.
Our Mission
Our mission is to deliver technically sound, compliant, and practical Protection & Control designs through a competency-driven engineering approach. We are committed to applying best practices, maintaining clarity and accuracy in all deliverables, and supporting our clients with reliable secondary systems that are safe, maintainable, and fit for purpose throughout the asset lifecycle.
Our Services
SLD (Single Line Diagrams)
We provide clear and accurate single line diagrams that represent the complete power system configuration. Our SLDs support effective design coordination, protection philosophy, and safe operation of substations and electrical networks.
KLD (Key Line Diagrams)
We provide detailed and standardized key line diagrams that clearly illustrate primary equipment layout and system interconnections. Our KLDs support protection philosophy development, operational clarity, and effective substation design coordination.
Wiring Diagrams
We provide detailed and accurate wiring diagrams showing point-to-point connections for protection, control, and auxiliary circuits. Our diagrams ensure correct installation, easy commissioning, and reliable long-term maintenance.
Cable Schedule
We provide comprehensive cable schedules detailing cable types, cores, routing, and termination points. Our schedules support accurate installation, testing, and efficient cable management across protection and control systems.
Protection Diagrams
We provide clear and well-structured protection diagrams that illustrate relay functions, CT/VT inputs, and tripping logic. Our diagrams support correct protection philosophy implementation, fault analysis, and safe system operation.
Battery Sizing
We provide accurate DC battery sizing calculations to ensure reliable power supply for protection, control, and tripping systems during normal and emergency conditions. Our designs comply with industry standards and ensure adequate autonomy, safety, and system availability.
Contact
support@secondarydesign.com
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