Benefits
of
Real time /
Dynamic / Thyristor
switched
Automatic Power Factor
Correction panels
>>> Very
fast / real time
response to changing loads.
Response time less than 1
sec. Due to very
fast capacitor bank
operation maintaining PF
close to unity is
possible. Customer can then
avail up to 5% incentive on
monthly
electricity bill offered by
most state electricity
boards.
Contractor operated/
std. APFC panel
respond to
changing loads in a sluggish
/ delayed manner. Typical
response time is
45 to 60 seconds. Due to
slow response these panels
are
unable to maintain PF close
to unity. Customer un able
to avail the
incentive.
>>> Soft / solid
state switching of the
capacitors by the
thyristor modules
eliminate the high inrush
currents and voltage sags
produced in std.
APFC panels. Elimination of
high inrush currents and
voltage sags is
beneficial for the
electrical equipment on the
premises. Due to this
soft switching the life of
power capacitors is 3 to 4
times more than
in std. APFC panels.
std.
APFC panels generate
unhealthy high inrush
currents and voltage sags
during electro mechanical
switching of the capacitor
banks. These put
severe stress on the
contractors and the
capacitor leading to their
frequent failures / reduced
service lives.
>>> Std. APFC
panels cannot be used when
the facility is
running on back up DG set.
So power factor is virtually
uncontrolled
when the plant is running on
DG set. Specially programmed
Real time
APFC panels can remain in
line even when the facility
is running on
back up DG set. Here PF is
maintained close to 1 even
when DG set is
running.
>>> Real time /
Dynamic / Thyristor switched
Automatic Power
Factor Correction panels are
low maintance and high up
time products.
Where as due to frequent
failures of contractors and
the
capacitors customer has to
suffer high maintance costs
and poor up time
when std. APFC panels are
used in locations with fast
changing
loads.
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Features of Hanut
India's Real Time APFC
panel
* The RT-APFC relay uses
intelligent switching
algorithm
to reduce the
number of capacitor bank
switching operations
required to attain the
required KVAR.
* The intelligent switching
algorithm of the power
factor control relay
also uses the capacitor
banks evenly thereby
allowing uniform aging of
the capacitors.
* The RT-APFC panel is
liberally sized. This allows
for systematic
placement of the components
and easy maintenance in
future. Panel is
designed for indoor use. It
is IP41 rated with forced
cooling.
* To prevent tampering with
the setting of the RT-APFC
relay a
secondary
glass door with sealing knob
is provided to cover the
relay.
* A system is as good as the
components it is made from.
Hanut India
uses only branded & high
quality components in its
APFC relay
panels. For example APFC
relay are from : EPCOS /
Schneider / Neptune
& power factor
correction capacitors
are: Heavy duty models
of
EPCOS /
Schneider / L&T make.
* Thermal management: High
temperature is detrimental
to the
performance
and service life of the
power factor correction
capacitors. To protect
power factor correction
capacitors from high
temperature they are
optimally placed at the
bottom of the cabinet with
liberal spacing
between the banks. Also one
or two AC 220V operated
exhaust fans are
provided in
the
capacitor bank section to
throw out the heat.
* Safety of the electrical
equipment and of the
maintenance staff have
been
given top priority while
designing and building the
APFC panel.
Capacitor manufacturers
installation instructions
are followed. The
power factor correction
capacitors are mounted on a
properly
earthed stainless steel
platform. An instruction
manual for proper
usage is supplied with the
RT-APFC panel.
* Descriptive alarms:
RT-APFC panel generates
visual alarms for faults
[over & under
compensation, over &
under voltage, high THD
harmonics in the supply] so
that faults can be
attended to before serious
damage can take place.
Additional 'alarm
becon' can be provided on
top of the APFC panel to
draw
the attention of maintenance
staff quickly.
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