*HVDC CIRCUIT BREAKER*


~A.C.  The value of current in the circuit is twice zero in the cycle so the A.C. 

 ~The circuit is opened when the cut in the circuit breaker passes through zero and the main question is whether the arm does not strike again. 

~ When the current in DC does not pass through zero hence DC.  

~In a rocket breaker it is necessary to somehow bring the current short circuit value to zero. 

~ In addition, D.C.  The circuit breaker aims to decipher the electromagnetic energy stored at a very high value.

~  Thus the HVDC circuit breaker has to overcome three pitfalls below ten.  

1Creating a state of current zero.  

2Preventing Restriking

3Desiccating the accumulated NG.


HVDC CIRCUIT BREAKER 



 *CREATING A STATE OF CURRENT      ZERO*


 ~The resonance circuits are connected as shown in 

~ (a).  M is circuit love.  The circuit of an oscillator is used to bring the position of S, current to zero. 

~ It is in a normal state, open, M and S) being closed, capacitors M, L, C, SJ, R nei, sy1 hat-6. 

~ (NO) is contact while s, is normally closed (NC) contact is charged. 

~ This voltage is in the cross of contact S. 

~ D.C.  Contact d is opened and s is closed, a to make the current interesting.  

~Thus the capacitor, L, M and s, is discharged along the way.

~  This produces the oscillatory difficulty of Dashville Wavecom in Figure 2.44. 

~ Circuit breaker »is concealed when current passes through zero, then contact S is opened, s is closed.

~  Another way to interrupt the main circuit direct current is to divert the main current through the capacitor thus reducing the cost of the interrupt through the circuit breaker.  

~This  Capacitor: Not initially charged.  

~When the main contact is opened, the main cut C is counted free.

~ Eat of Rise of Recovery Voltage (RRRY dVc la) is the value of. Non-Senior Steister de C absorbs energy