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Sym-
bol/abbreviation
t
b
t
d
t
g
t
i
T
p
t
r
t
sd
t
S
t
ZSI
U
U
e
U
Nn
3VA molded case circuit breakers with IEC certificate
Manual, 03/2019, A5E03603177010-03
Meaning
Delay time (delay of blocking time)
Response time
Delay time associated with the adjustable response current; trip time associated
with ground-fault current setting value
"Virtual" trip time of I protection; highest trip time associated with rated tripping
current of instantaneous trip
Trip time; delay time; time-lag class
Trip time associated with current setting value of adjustable overload protection
Trip time associated with short-time delayed tripping current; delay time of S pro-
tection
Fuse pre-arcing time
Delay time of all molded case circuit breakers which detect the short circuit but do
not receive a blocking signal when ZSI is activated.
Voltage across main contacts of the molded case circuit breaker
Maximum voltage; rated operational voltage
Nominal system voltage
List of abbreviations
C.1 List of abbreviations
655
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