Siemens SENTRON 3VA27 - Page 282

List of abbreviations
C.1 Table of abbreviations
3VA27 molded case circuit breakers & 3WL10 air circuit breakers
280 Manual, 10/2018, L1V30499596002-01
Abbreviation
Meaning
RCD
Residual Current Device
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
Sym-
bol/abbreviation
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-
circuit 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 ad-
justable overload protection (pickup value overload protection)