Profile: Keystone Electrical Mfg. Co. is a manufacturer of electrical control panels, custom medium voltage systems including switchgear and power equipment. We provide protection & control panels, turnkey substation control centers, medium voltage systems, and low voltage control panels. We offer indoor and outdoor enclosures, custom fabricated, or off-the-shelf. We offer line, distribution, transformer protection, bus differential, and metering panels. We cater to needs in wind turbine and solar energy systems.