Antes que nada te advierto que no soy electricista, pero me gustaría ayudar en la medida de lo posible. Esta sería mi traducción:
In a generator system, varistors are placed between the positive, negative and ground plates to protect it against excesive tension that may be induced by atmospheric discharge.
The insulation of all components of the installation must be type II.
The modules frames and the supporting structure should be grounded to the building structure by using naked copper cables according to current rules and regulations.