TAVRIDA ELECTRIC ISM Shell_2 Series, Руководство по применению

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Compact design
Tavrida Electric develops and produces all vital parts of the circuit breakers themselves. The result of intensive
inhouse fundamental and material research are extremely compact vacuum interrupter and magnetic actuators.
Optimal selection of all components makes these the most compact and light weight vacuum circuit breaker in
the world.
Long life
Contact erosion is minimised by use of axial magnetic field. All the switching elements are assembled axially and
symmetrically in one straight line. This means that all the mechanical movements are exclusively direct and linear.
30 000 operating cycles can be achieved with rated current without replacing or adjusting any components.
Maintenance free
The ISM is maintenance-free over the expected life of at least 25 years.
Highest availability
In addition to minimising the number of failure-critical components, the Tavrida Electric circuit breaker monitors
its status continuously. In the unlikely event that a fault occurs it is indicated and can be rectified before an unsuc-
cessful switching attempt is made. This leads to higher availability of the electric power supply system.
Des ign and Method of Operation: ISM and CM
The ISM vacuum circuit breaker uses three single-coil magnetic actuators, one per pole. The three actuators are
mounted in a steel frame and mechanically linked by a synchronizing shaft (Figure 3).
1. Support insulator
2. Upper terminal
3. Vacuum interrupter
4. Movable contact with bellows
5. Lower terminal
6. Pulling insulator
7. Actuator stator
8. Opening and contact pressure springs
9. Actuator coil
10. Actuator armature
11. Synchronizing shaft
12. Auxiliary contacts
13. Interlocking shaft
14. Main contacts position indicator link
15. Frame
16. Fixing points
Figure 3
View into the ISM
Indoor Switching Module (ISM)
1
2
3
4
6
7
10
13
5
14
15
12
11
16
8
9
1
1. Terminals
2. LED indicators
3. Fastening holes
4. Grounding stud
Control Module (CM)
3
2
1
Figure 4
Control Module