Siemens SENTRON 3WL10 - Page 269

Abbreviation Meaning
RR Remote reset magnet
RTC Ready to close signaling switch
S Short-time-delayed short-circuit protection (ST)
ST Short-time-delayed short-circuit protection
ST/CC Auxiliary solenoid
TCP Transmission Control Protocol
TD Test Device
USB Universal Serial Bus
UVR Undervoltage release
VDE Verein Deutscher Ingenieure (Association of German Electrical Engineers)
VDI Verein Deutscher Ingenieure (Association of German Engineers)
Table C-2 Meaning of symbols and abbreviations
Symbol/abbre‐
viation
Meaning
Δt Delay time
I
Δn
Residual current; rated residual current; response current
I
1
Inrush current
I"
KG
Initial balanced short-circuit current
I
2
t Let-through energy
I
cm
Making capacity; rated short-circuit making capacity
I
cn
Rated breaking capacity; rated short-circuit breaking capacity
I
cs
Maximum short-circuit breaking capacity (partial selectivity); rated service short-cir‐
cuit breaking capacity
I
cu
Maximum short-circuit breaking capacity (full selectivity); rated ultimate short-circuit
breaking capacity
I
cw
Rated short-time withstand current; rated short-time current
I
d
Prospective current; residual current; response residual current
I
D
Let-through current
I
g
Ground-fault protection; ground-fault release; ground-fault current setting value
I
i
Instantaneous tripping current; instantaneous short-circuit protection; instantaneous
magnetic protection; rated tripping current of instantaneous trip
I
k
Short-circuit current
I
KD
Uninterrupted short-circuit current
I
KMAX
Maximum short-circuit current
I
Kmaxline
Uninterrupted short-circuit current of system
I
n
Rated current
I
P
Rated peak withstand current, impulse short-circuit current
I
r
Thermal protection; setting current; response value; current setting value of adjusta‐
ble overload protection (pickup value overload protection)
I
s
Limit current with selectivity; maximum short-circuit current for selectivity limit
I
sc
Prospective current
List of abbreviations
C.1Table of abbreviations
3VA27 molded case circuit breakers & 3WL10 air circuit breakers
268 Equipment Manual, 10/2023, L1V30499596002-03