Danfoss VLT 8000 AQUA Istruzioni per gli Interventi Scaricare il pdf (Pagina 59)

VLT

8000 AQUA

Installation

■ Extra protection with regard to indirect contact

ELCB relays, multiple protective earthing or earthing can

be used as extra protection, provided that local safety

regulations are complied with. In the case of an earth

fault, a DC content may develop in the faulty current.

Never use ELCB relays, type A, since such relays

are not suitable for DC fault currents.

If ELCB relays are used, this must be:

• Suitable for protecting equipment with a direct

current content (DC) in the faulty current

(3-phase bridge rectifier)

• Suitable for power-up with short charging

current to earth

• Suitable for a high leakage current

MG.83.A2.02 - VLT is a registered Danfoss trademark

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Danfoss VLT 8000 AQUA Istruzioni per gli Interventi Pagina 59