Siemens NXPLUS C User Manual

802-9081.9 • INSTALLATION AND OPERATING INSTRUCTIONS • NXPLUS C • Revision 11 73/293
Description
Operating cycles 3AH25
Fig. 39: Permissible number of operating cycles n as a function of the breaking current I
a
(r.m.s. value) in kA
Rated operating sequences:
Rapid transfer (U): O-t-CO-t'-CO (t = 0.3 s, t'= 3 min)
Auto-reclosing (K): O-t-CO-t'-CO (t= 0.3 s, t'= 3 min)
Auto-reclosing (K): O-t-CO-t'-CO (t= 0.3 s, t'= 15 s)
Operating times
Rated voltage kV 7.2 12 15
Rated current A ≥ 1000/1250
Rated short-time withstand
current
kA 31.5
Rated normal current Operating cycles 30,000
Short-circuit breaking current Operating cycles 50
O = OPEN operation
C = CLOSE operation
CO = CLOSE operation with subsequent OPEN operation at the internal close-open time of the vacuum circuit-
breaker
Operating times Component Item designation Duration Unit
3AH55 3AH25
Closing time 75 75 ms
Charging time <15 <15 s
Opening time Shunt release (-Y1) <65 <65 ms
Additional release 3AX
11
(-Y2), (-Y4), (-Y6), (-Y7) <50 <50 ms
Arcing time <15 <15 ms
Break time Shunt release (-Y1) <80 <80 ms
Additional release 3AX
11
(-Y2), (-Y4), (-Y6), (-Y7) <65 <65 ms
Dead time 300 300 ms
Close-open contact time Shunt release (-Y1) <75 <80 ms
Additional release 3AX
11
(-Y2), (-Y4), (-Y6), (-Y7) <60 <65 ms
Minimum command duration
CLOSE Closing solenoid (-Y9) 45 45 ms
OPEN Shunt release (-Y1) 40 40 ms
OPEN Additional release 3AX
11
(-Y2), (-Y4), (-Y6), (-Y7) 20 20 ms
Shortest impulse duration of the c.b. tripping signal 10 10 ms

Siemens NXPLUS C Specifications

General

Brand	Siemens
Model	NXPLUS C
Category	Circuit breakers
Language	English