CHICAGO–(BUSINESS WIRE)–Exelon has secured more than $1 billion in customer protections through pioneering Transmission Security Agreements (TSAs), a major milestone in advancing the Exelon Promise to protect families and small businesses and keep bills as low as possible by ensuring large new power users cover their fair share of the costs of the transmission system used to serve customers.As artificial intelligence, electrification, advanced manufacturing and economic development accelerate