Siemens SENTRON 3VL System Manual page 343

● No characteristics/trips are listed for fuses. The fuse types have the following operating
classes:
● Explanation of the abbreviations:
3VL molded-case circuit breakers
System Manual, 03/2009, 110 0110 - 02 DS 01
Type
3NA
5SA1
5SA2
5SB1/3
5SB2/4
5SC1
5SC2
5SD4/5
5SD6
5SE2
Abbreviation
line
motor
starter
insulation circuit breaker
I
R
I
sd
t
sd
I
i
I
cn
TM
ETU
Settings of the LI and LSI releases of the upstream and downstream protective devices for
calculating the selectivity limits:
I
R
I
sd
t
sd
I
i
Operating class
gL / gG
"quick-response"
"time-lag"
"quick-response"
"time-lag"
"quick-response"
"time-lag"
gR
"quick-response"
gL / gG
Explanation
for line protection
for motor protection
for starter combinations
Switch disconnectors
Current value of the overload release
Current value of the short-time delayed short-circuit release
Delay time of the short-time delayed short-circuit release
Current value of the instantaneous short-circuit release
Rated short-circuit breaking capacity
Thermomagnetic trip unit
Electronic trip unit
1 x I
r
max.
³ 100 ms
max.
Appendix
B.1 Selectivity
343