Siemens UL 489 - Page 344

28 – 2
I
2
t
sd
Delay time for S tripping based on formula I
2
t
sd
= constant
I
4
t Delay time-current relationship based on formula I
4
t = constant
I-tripping Instantaneous tripping (short-circuit)
I
ab
Operating value for load shedding
I
an
Operating value for load restore
I
cs
Rated operational short-circuit breaking capacity
I
cu
Rated ultimate short-circuit breaking capacity
I
cw
Rated short-time withstand current
ID Identification number
IEC International Electrotechnical Commission
I
g
Current setting value for G-tripping
I
i
Current setting value for I-tripping
I
IT
Single-pole short-circuit test current (IT systems)
I
N
Current setting value for N-tripping
I
n
Rated current (value of Rating Plug)
I
n max
Max. possible rated current
I
R
Current setting value for L-tripping
I
sd
Current setting value for S-tripping
L1 Phase 1
L2 Phase 2
L3 Phase 3
L-tripping Long-time delayed tripping (overload)
LED Light emitting diode
M Motor
MOC Mechanism Operated Auxiliary Conntacts
N Neutral pole
NC Normally closed contact
NO Normally open contact
N-tripping Neutral (overload) tripping
PIDG Ring lug style (Trademark of AMP)
PZ 3...6 Crimping tool (Weidmüller GmbH)
S
1/2/3
Circuit breaker
1/2/3
(mutual mechanical interlocking module)
S1 Contact position-driven auxiliary switch
S10 Switch Electrical Closed
S11 Motor cut-off switch
S12 Motor disconnect switch
S13 Cut-off switch for remote reset
S14 Cut-off switch for shunt trip F1 (fast operation)
S15 Cut-off switch for closing coil CC (fast operation)
S2 Contact position-driven auxiliary switch
S20 Signaling switch for "ready-to-close"
S22 Signaling switch for 1st shunt trip