881-4027.9 * INSTALLATION AND OPERATING INSTRUCTIONS 8BT2 * Revision 04
19
Shunt release coils
Release
Power consumption
Tripping ranges
DC [approx. W]
AC [approx. W]
voltage [at DC]
voltage or current [at AC]
Closing solenoid
140
140
85 to 110% U
85 to 110% U
1
st
shunt release
140
140
70 to 110% U
85 to 110% U
2
nd
shunt release
70
50
70 to 110% U
85 to 110% U
Under voltage release
20
20
35 to 0% U
35 to 0% U
Operating times
Operating times at rated voltage at secondary
circuit
Equipment of circuit
breaker
Duration
3AH3 type CB
3AH5 type CB
Closing time
-
<75 ms
<65 ms
Opening time
1
st
shunt release
<60 ms
<55 ms
2
nd
and 3
rd
release
<55 ms
<45 ms
Arcing time
-
<15 ms
<15 ms
Break time
1
st
shunt release
<80 ms
<70 ms
2
nd
and 3
rd
release
<60 ms
<60 ms
Dead time
-
300 ms
300 ms
CLOSE/OPEN contact time
1
st
shunt release
<90 ms
<75 ms
2
nd
and 3
rd
release
<70 ms
<60 ms
Minimum command duration
Closing solenoid
45 ms
45 ms
1
st
shunt release
40 ms
40 ms
2
nd
and 3
rd
release
20 ms
20 ms
Pulse time for CB tripping signal
1
st
shunt release
>15 ms
>15 ms
2
nd
and 3
rd
release
>10 ms
>10 ms
Spring charging time for electrical operation
-
<15 s
<15 s
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.
Arcing time: The interval of time from the first initiation of an arc and the instant of final arc
extinction in all poles.
Break time: The interval of time between the initiation (command) of the opening operation
and the instant of final arc extinction in the last-pole-to-pole (= opening time and arcing time).
Close/open contact time: The interval of time (in a make-break operating cycle) between the
instant when the contacts touch in the first pole in the closing process, and the instant when
the contacts separate in all poles in the subsequent opening process.
NOTE!
For the detailed information about 3AH series circuit breaker (CB), please consult to the
below catalogues:
3AH3 vacuum CB……3AH3_Catalogue HG11_03_2010
3AH5 vacuum CB……3AH5_Catalogue HG11_05_2010
2.4.2. Disconnector truck
Features of
• Truck firmly interlocked with panel
Disconnector truck
• The control cables of the truck are connected with the panel through a low voltage plug
connector to be coupled manually when the truck is inserted in the panel
2.4.3. Metering truck
Basic equipment of
• Voltage transformers for all three phases
metering truck
Additional equipment
for vacuum circuit
• Electromagnetic interlocks
breaker
