Siemens SINOVA - Glossary; Glossary of Circuit Breaker Terms

List of abbreviations
3WJ Air Circuit breakers
214 Operating Instructions, 12/2022, L1V30828903001-01
Abbreviation
Meaning
TRIP LT
Cause for last trip was an overload in a main conductor
TRIP ST
Cause for last trip was a short-circuit (delayed)
TRIP TEST
Test trip for circuit-breaker testing
tsd
Delay time of short-circuit trip
Uc
Rated control circuit voltage
Ue
Rated operational voltage
Ui
Rated insulation voltage
Uimp
Rated impulse withstand voltage
UTHD
Setting for total harmonic distortion (THD) voltage
UVR
UnderVoltage Release (undervoltage release, instantaneous)
UVR-t
UnderVoltage Release - time delay (undervoltage release, delayed)
VDE
Verband der Elektrotechnik Elektronik und Informationstechnik e. V. (Ger-
man Association for Electrical, Electronic and Information Technologies)
V-TAP
Internal voltage tap
WBT
Web-based training
X
Terminal marking according to DIN
Y1
Closing coil
Z = …
Supplement to article number "Further options"