Siemens SENTRON 3WA1 - Page 574

List of abbreviations
3WA1 air circuit breaker
572 Equipment Manual, 02/2023, 92310000002-06
Abbreviation
Meaning
SIGUT
Siemens strain-relief clamp
ST
Shunt trip
ST2
Shunt trip 2 (2nd shunt trip)
TEST
Test position
t
g
Delay time of ground-fault tripping
t
r
Delay time of overload trip (defined as 6 x I
r
)
TRIP GF
Trip reason was ground fault
TRIP INST
Trip reason was short circuit (instantaneous)
TRIP LT
Trip reason was overload in a main conductor
TRIP ST
Trip reason was short circuit (delayed)
TRIP TEST
Test trip for circuit-breaker testing
t
sd
Delay time of short-circuit trip
U
c
Rated control circuit voltage
U
e
Rated operational voltage
U
i
Rated insulation voltage
U
imp
Rated impulse withstand voltage
U
THD
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.
(German Association for Electrical, Electronic and Information
Technologies)
V-TAP
Voltage tap (internal)
WBT
Web-based training
X
Terminal marking according to DIN
Z = …
Supplement to article number "Further options"
ZSI
Zone Selective Interlocking