Disconnector Truck; Metering Truck - Siemens 8BT2 Installation And Operating Instructions Manual

Shunt release coils
Operating times
2.4.2.

Disconnector truck

Features of
Disconnector truck • The control cables of the truck are connected with the panel through a low voltage plug
2.4.3.

Metering truck

Basic equipment of • Voltage transformers for all three phases
metering truck
Additional equipment
for vacuum circuit
breaker
881-4027.9 * INSTALLATION AND OPERATING INSTRUCTIONS 8BT2 * Revision 04
Release
DC [approx. W]
Closing solenoid
st
1 shunt release
nd
2 shunt release
Under voltage release
Operating times at rated voltage at secondary
circuit
Closing time
Opening time
Arcing time
Break time
Dead time
CLOSE/OPEN contact time
Minimum command duration
Pulse time for CB tripping signal
Spring charging time for electrical operation
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
• Truck firmly interlocked with panel
connector to be coupled manually when the truck is inserted in the panel
• Electromagnetic interlocks
Power consumption
AC [approx. W]
140 140
140 140
70 50
20 20
Equipment of circuit
breaker
st
1 shunt release
nd
2 and 3
st
1 shunt release
nd
2 and 3
st
1 shunt release
nd
2 and 3
Closing solenoid
st
1 shunt release
nd
2 and 3
st
1 shunt release
nd
2 and 3
Tripping ranges
voltage [at DC] voltage or current [at AC]
85 to 110% U 85 to 110% U
70 to 110% U 85 to 110% U
70 to 110% U 85 to 110% U
35 to 0% U
Duration
3AH3 type CB
- <75 ms
<60 ms
rd
release <55 ms
- <15 ms
<80 ms
rd
release <60 ms
- 300 ms
<90 ms
rd
release <70 ms
45 ms
40 ms
rd
release 20 ms
>15 ms
rd
release >10 ms
- <15 s
35 to 0% U
3AH5 type CB
<65 ms
<55 ms
<45 ms
<15 ms
<70 ms
<60 ms
300 ms
<75 ms
<60 ms
45 ms
40 ms
20 ms
>15 ms
>10 ms
<15 s
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