SMA WB 5000A-11 - Manual (Page 19)

SMA Solar Technology AG Glossary
User Manual WB5A-6A-BA-BEN114530 19
8 Glossary
AC
Abbreviation for "alternating current".
DC
Abbreviation for "direct current".
Derating
A controlled reduction in performance, usually dependent on component temperatures.
SMA Power Balancer
The SMA Power Balancer is a serial feature of the inverter. The SMA Power Balancer prevents the
formation of an unbalanced load > 4.6 kVA (in Italy > 6 kVA) during three-phase feed-in. To this effect,
3 Windy Boys are connected via a control line to a 3-phase feed-in unit.
Varistor
The varistors protect the electronics in the inverter from atmospherically coupled energy peaks, such
as may occur when lightning strikes nearby.