For Suppression of Voltage Surges& Switching Transients
Steep fronted waves (lightning or switching)
on transmission as well as distribution
networks, can cause inter turn insulation
failure of rotary machines and transformers.
Surge Capacitors provide surge protection to
high voltage motors, transformers and
generators by limiting the voltage rise.
Hence Surge Capacitors are used as
protective devices for protection of power
system equipments. Surge Capacitors are
designed taking into consideration its
application to operate under severe stringent
power system conditions.
Connecting surge Capacitors between line
and ground at the motor / transformer /
generator terminals in shunt, prevent the
equipments from damage due to voltage
surges. For a more comprehensive protection
scheme, Surge Capacitors may be used in
conjunction with surge arrester. This surge
pack modifies both the wave shape and
Lightning arrester takes no current from the
line during normal operation. When a surge
occurs, the arrester turns on to provide a
discharge path. When the surge disappears,
the arrester turns off.
The main advantage of a Capacitor is that
there is no time delay in turning on as it
always conducts. The disadvantage is that the
amount of current it can handle is limited to a
few amps, depending on the Surge Voltage.
For this reason, an arrester should always be
installed with a Capacitor to protect
Capacitor from intense surges.
These Capacitors are virtually maintenance
free, needing only occasional cleaning of
bushings and painted surface and ensuring
adequate tightening of electrical
connections. Temperature rise of surge
Capacitor is to be monitored continuously.
Surge Capacitors are never protected with
any type of fuse or any protection as itself is a
• Low losses < 0.8 watts per kVAr
• World Class Raw Materials
• Manufactured in state of art infrastructure
• Volume Optimized and highly Reliable
• Trouble free Long life performance
• Low noise level
• Environmentally friendly.
Single Phase Capacitors units
• 0.125 to 0.5 uF
• Up to 40 kV
• 50 Hz or 60 Hz
• Indoor or outdoor use.
Capacitors are designed for working
temperature between -10°C to +55°C
Surge Capacitors may be mounted vertically
or horizontally as required by the customer.