Analysis of air switch symbols The meaning of air switch symbols
Air switch symbols The role of air switches
I understand that automatic air The switch (QF) is mainly used for low-voltage power circuit to distribute electric energy and infrequently make and break the circuit, and has the function of automatic tripping when fault occurs.
Figure 1. Air Switch Symbols
Meaning of Air Switch Symbols
Ui Insulation Voltage
Uimp peak withstand voltage
Icu ultimate short-circuit breaking capacity
Ics operating short-circuit breaking capacity
Ir rated current
Ui:750v Uimp:8kv
Ve:220/240v lcu:85kA
lcs=100%lcu
Ir:63A*(1.0/0.9 /0.8) Im:500A
