There are many aspects that must be considered in designing and specifying capacitor banks. The equipment electrical ratings, physical arrangement, and relay protection scheme are intimately intertwined. The bank must be designed to accommodate all applicable devices such as instrument transformers, capacitor switches, protective relays, fuses, and bus-work, along with other devices specific to the application. Capacitor bank protective schemes must be designed and applied to provide the signals required for protective relaying to perform as expected.

• Capacitor Bank Purchasing Specifications Guidance | Podcast
  Guidance to help engineers draft comprehensive and clear purchasing specifications for capacitor banks by Roy W. Alexander a fellow of IEEE and Distinguished member of CIGRE.
  
• Capacitor Bank Purchasing Specifications Guidance | NEMA US G 112-2021
  This document provides guidance to help engineers draft comprehensive and clear purchasing specifications for capacitor banks. After providing an overview of the relevant Standards, and sections within those Standards, we provide helpful information to assist with cost-impact analysis and considerations for product ratings, rack designs, and bank configurations.