What is the designation for a designed 200 kW plant that must be at least?

The designation for a designed 200 kW plant is commonly referred to as PME, which stands for Power Management Equipment. This designation is critical because it denotes that the power generation system has been specifically designed and rated to manage or deliver power at a certain capacity, in this case, 200 kW.

Plants must meet various standards and designations to ensure they operate efficiently and safely, and PME signifies the necessary governmental and industry recognition for systems capable of handling specified power outputs. This designation provides assurance that the system is constructed with the appropriate specifications for power generation and management, often covering aspects such as energy efficiency, safety regulations, and operational capabilities.

The other choices do not correctly represent the designation for this scenario; thus, PME is the accurate answer.