Brochure/Catalogue

for EMR for SSR
Z
Zero-voltage switching ,
zero-cross switching
Solid-state relays with AC outputs such as triacs or thyristors which switch on at
the zero crossing of the switching voltage and switch off at the zero crossing of
the switching current. For this reason, the switching procedure may be delayed
depending on the phase position at the time of switching and on the mains
frequency of the switching voltage.
t
on
t
off
t
on
≤10 ms t
off
≤10 ms
Signal characteristics of zero cross switching PSSR
U
input
t
t
U, I
shown at an example with resistive load
U
Load
I
Load
x
EMR = Electromechanical relay
SSR = Solid-state relay
W
Technical appendix/Glossary
W.412737920000
Glossary: Relay modules and Solid-state relays