Description
44 Revision 03 * INSTALLATION AND OPERATING INSTRUCTIONS 8DJH * 500-8067.9
8.4 Vacuum circuit-breaker
Switching capacity and classification of switching devices
Vacuum circuit-breaker with switching capacity according to IEC/EN 62 271-100 /
VDE 0671-100.
Operating times
Closing time The interval of time between the initiation (command) of the closing operation and
the instant when the contacts touch in all poles.
Opening time The interval of time between the initiation (command) of the opening operation and
the instant when the contacts separate in all poles.
Type 2 for individual switchgear panels and panel blocks
Rated voltage U
r
kV7.2121517.524
Rated normal current of feeders I
r
A250, 630
Rated short-time withstand current I
k
for switchgear with
t
k
= 1 s
I
k
(
th
)kA 20 16
for switchgear with
t
k
= 3 s
I
k
(
th
)kA 20 16
Rated peak withstand current I
p
up to kA 50 40
Rated short-circuit breaking current I
sc
up to kA 20 *
16
2)
Rated short-circuit making current I
ma
up to kA 50 40
Number of mechanical operating cycles for
disconnector / earthing switch
Classification n 1,000 / M0
Number of mechanical operating cycles for circuit-
breaker
Classification n 2,000 / M1
Classification, electrical E2, C1
Rated operating sequence O-3min-CO-3min-CO
Number of short-circuit breaking operations n 6 or 20
* 21 kA at 60 Hz
2)
20 kA in preparation
Operating times Component Duration
for type 2
Unit
Closing time 25 ms
Charging time < 15 s
Opening time Shunt release (Y1) < 30 ms
Additional release
3AX 11
(Y2), (Y4),(Y7) < 50 ms
Arcing time < 15 ms
Break time Shunt release (Y1) < 50 ms
Additional release
3AX 11
(Y2), (Y4),(Y7) < 50 ms
Dead time 3 min ms
Close-open contact time Shunt release (Y1) < 80 ms
Additional release
3AX 11
(Y2), (Y4),(Y7) < 80 ms
Minimum command duration
CLOSED Closing solenoid (Y9) 60 ms
OPEN Shunt release (Y1) 30 ms
OPEN Additional release
3AX 11
(Y2), (Y4),(Y7) < 40 ms
Shortest impulse duration of
the c.b. tripping signal
10 ms
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