Vacuum circuit breaker
Left & Right Side Fix Vacuum Circuit Breaker
Basically, the charged carriers or ions are factors guiding electric current and arc when contacts are separated from each other. As there are no charged carriers or ions in perfect vacuum, separating contacts should have no arc theoretically. Of course, in practice, there is created an appropriate environment for the charged ions due to brief evaporation of contacts. By passing current from point of zero, the suspended metal particles will be quickly cooled and sit on the contacts; as a result, the spark will be shut off.
According to Paschen Curves, high values of dielectric strength of medium can be obtained at very low or very high pressure levels.
The characteristics of insulation at very low pressure values provide very low distance between contacts. Ths distance varies from 10mm to 20 mm considering the voltage level.
Advantages of Vacuum Circuit Breakers
• Very long lifetime of the contacts (this provides longer breaker life)
• Less maintenance in mechanism
• Less force needed to separate the contacts (since the distance between contacts is shorter)
• Environment friendly. Since interruption takes place in vacuum medium, VCBs do not require gas or liquid addition. This reduces the possibly of leakage of gas (or any material) that can be harmful for environment.
• Ability to 10,000 making and breaking in the rated current and 100 making and breaking in short circuit current
• Motorized with remote control (automation)
• Italian CESI and Romanian ICMET type test
• Approved by Power Research Institute
• Two years unconditional Guaranty and twenty years after-sales services
• Free education for MV panel-makers
Operating Mechanism
The operation mechanism is a mechanical system based on stored energy within a spring.
Storing Energy
• With geared DC motor (electrically)
• With operating handle (manually)
Releasing Energy
• With Shunt releases (electrically)
• With open/close button placed on mechanism (manually)
Spring charging motor
Used to charge closing spring.
Auxiliary contact group
This contact takes initial force from the drive shaft of breaker. So changes its position with open/close operations of breaker. If not specified, the default components are 6 normal open (No) and normal close (NC) contacts, these are used in the open/close control circuit of breaker.
Open/Close Releases
All mechanisms based on stored energy principle must have opening and closing releases.
The opening/closing circuits, respectively. The Opreating voltages of release must be specified at order by client.
Under voltage relay with installation ability
Routine Tests
• Power frequency withstand test on main circuit
• Power frequency withstand test on auxiliary and control circuits
• Measurement of opening and closing items
• Mechanical tests
• Tightness test (valid for EGK type breakers)
Technical characteristics for fix vacuum circuit breaker
