Eltek Valere UNV-F 2.5 Manual de usuario descargar pdf (Pagina 7)

Static Transfer Switch

UNB

User Manual

Page 7 (28)

2.2 Operating modes

The static transfer switch UNB is designed for the operating modes “inverter priority” and “mains priority” alterna-

tively.

Source 1 is defined as priority source, source 2 is defined as substitute source. Source 1 feeds the load as long as

source 1 works faultlessly.

2.2.1 "Inverter priority" (default setting)

REMARK: The unit's default setting is "Inverter priority". In this case the inverters are source 1, mains is source 2.

The UNB switches to source 2 if source 1 fails or is overloaded (i.e. distortions by short circuit behaviour or over-

load).

REMARK: The priority source is programmable using service menu 2.

2.2.2 "Mains priority"

At operating mode “mains priority” AC mains works as source 1 and the inverter(s) as source 2.

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Eltek Valere UNV-F 2.5 Manual de usuario Pagina 7