802-9081.9 • INSTALLATION AND OPERATING INSTRUCTIONS • NXPLUS C • Revision 11
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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
