Components; Truck Type 3Ah Vacuum Circuit Breaker - Siemens 8BT2 Installation And Operating Instructions Manual

2.4.

Components

2.4.1.

Truck type 3AH vacuum circuit breaker

Features of truck
with vacuum circuit • Mechanical position indicators for circuit-breaker
breaker
Additional equipment
for vacuum circuit
breaker
Spring charging motor
18
ATTENTION!
In the normal operation, be sure that the red flag shown in fig7 is inserted to the hole until
disappeared from the front of the panel.
The ventilation window should be open to be able to perform the natural air flow. If not,
the cooling will not be efficiently done. Accordingly, temperature rise value may exceed
the limit.
Openings on the outer enclosure are needed to perform the air circulation in the panel for
2500A and 3150A rated feeder currents. Although slots and meshed flaps are arranged at the
outer of enclosure, IP4X protection degree and the safety conditions in the case of hot gas
release because of an arc fault are still available.
• Integrated mechanical interlock for operating mechanism
• Truck firmly interlocked with panel
• Manual operation of the switching device truck mechanism
• The control cables of the truck are connected with the panel through a low-voltage plug
connector to be coupled manually when the circuit breaker truck is inserted in the panel
• Electromagnetic interlocks
• Second shunt release
• Under voltage release
• C.t.-operated release 0.1 s
• Design for higher insulation requirements
Note: For operating instruction, please see Page76, clause 6.9
Technical data
Operating voltage
Rated voltage
max. [V]
24 DC 26
48 DC 53
60 DC 66
110 DC 121
220 DC 242
110 AC 121
230 AC 244
Revision 04 * INSTALLATION AND OPERATING INSTRUCTIONS 8BT2 * 881-4027.9
Power consumption
min. [V] W [at DC] VA [at AC]
20 500
41 500
51 500
93 500
187 500
93 -
187 -
Rated current of miniature circuit
breaker (CB) with C-characteristic [A]
3AH3 type CB
- 16
- 8
- 6
- 4
- 2
650 4
650 2
3AH5 type CB
8
6
4
3
2
3
2