خازن فشار قوی ویشای High Voltage Power Vishay ESTA

Individual Power Factor Correction
The power factor correction capacitor is connected directly to 
the terminals of the consumer and will be switched together 
with it. The advantages of this method are: Relief of the 
conductor lines and switches, no capacitor switches or 
discharge resistors are needed, and the installation is simple 
and cheap. The individual compensation is the best solution 
for large consumers (e.g. motors), particularly if they are 
in continuous operation.
Individual Power Factor Correction of 3-Phase Motors
The motor and the capacitor are connected in parallel. 
They are both switched in and out by means of one and 
the same switchgear and also monitored by a common 
protective device. A discharge device is not required, because 
discharging takes place through the motor windings.
The switchgear must be rated to be capable of withstanding 
the inrush current of the capacitor and the connection lines 
must be capable of withstanding the full load current of the 
motor. The capacitor, in this case, has to be installed in close 
proximity to the motor. 
Individual Power Factor Correction of Power Transformers
The direct connection of the capacitor to a power transformer, 
which is jointly switched in and out, is feasible and permissible 
both at the H.V. side and the L.V. side.
In cases where harmonics exist in the line, the line should 
be checked to determine whether the capacitors and the 
power transformer are connected in series and create a 
resonance.
Care should be taken not to overcompensate the power 
transformer during low load operation in order to avoid an 
unacceptable rise in voltage.
Individual Power Factor Correction of Welding Machines
The output of capacitors for welding transformers and 
resistance welding machines only needs to be in the range of 
30% to 50% of the nominal transformer capacity. For welding 
rectifi ers, a capacitor output of about 10% of the nominal 
capacity of the transformer/rectifi er is suffi cient.
Group Power Factor Correction
The power factor correction capacitor is connected to the 
secondary distribution system which feeds a number of 
individual motors, operating either continuously or at intervals.
The motors and the capacitors are each switched in and 
out separately and are monitored by separate protective 
devices. The capacitors can be switched in or out individually 
or in groups