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Medium
Voltage Pole-Top
Capacitor Banks
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NEPSI’s
MVPTCä (Medium Voltage Pole-Mounted Capacitor
Bank) are designed and constructed for application
on utility and industrial power systems for the
purpose of power factor correction, voltage control,
and loss reduction. Banks are available
from 150 kvar to 3000 kvar at voltage levels from
2400 volts to 34.5 kV. The
banks are completely prewired at the factory with
a variety of control options and accessories to
simplify installation and meet customer control
requirements.
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Product
Scope and Benefits
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- Bank
voltages of 2.4kV through 34.5kV
- Ratings
to 1200 kvar at 2.4kV and 3000 kvar at 12.47kV
through 34.5kV.
- Improved
voltage regulation, power factor control,
and loss reduction.
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Figure
1 - Typical
poletop capacitor bank installation. The current/voltage
monitoring insulator or PT/CT provides a control
signal to the control box for automatic operation
of the vacuum/oil switches. The cutouts provide
overcurrent protection and also provide a visible
disconnect during maintenance.
Application
The
MVPTC™ is designed for three phase utility distribution
feeders and medium voltage supply entrances to
commercial and industrial power systems.
It is an inexpensive alternative to pad-mounted
and metal-enclosed capacitor banks when space
is not available. Trained medium voltage technicians
are required for their maintenance and operation
as hot-sticks and work in close proximity to the
high voltage conductors is required. Customers
who do not employ trained medium voltage technicians
should strongly consider the application of metal-enclosed
automatic capacitor banks.
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Standard Features
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Rack
All-welded
all-aluminum 3 inch web channel construction for
cantilever pole mounting on standard utility class
wooden poles. Standard ground study for
#6 soft drawn copper. Three capacitor and
6 capacitor rack designs available. Six
cell racks available on units supplied with three
cells to allow for expansion.
Capacitors
The
capacitors are a low loss, all-film, double bushing,
design with ANSI gray stainless steel tanks.
Capacitors are connected in wye for optional grounding
by customer Capacitors produce rated kvar
at rated voltage and frequency. Capacitors comply
with all applicable NEMA and ANSI/IEEE standards.
Internal discharge resistors reduce residual
voltage in capacitors to less than 50 volts within
5 minutes of de-energiztion. Dielectric fluid
is environmentally friendly, biodegradable, non
PCB with low toxicity.
Control
Package
The pole-top banks can be
supplied with a variety of control options. See
table 1 below for further information.
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Switches
Three
single phase, 15kV group operated oil switches
(optional vacuum switches available) are supplied
with the pole-top bank. A rack mounted aluminum
junction box simplifies wiring to the control
box at base of pole.
Control Box
Pad
locking NEMA 3R is supplied as standard for mounting
at base of pole.
Fault
Current Rating
Capacitors
have a 10,000 amp fault current handling capability.
Operating
Temperature
-46F (-40C) to +115F (+46C)
Warranty
5 year replacement on the
rack and 1 year replacement on the capacitors.
Optional extended warranties available on request.
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Miscellaneous
Accessories and Options
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Cross
Arm/Cross Arm Brace
(CC)
An
industry standard cross arm and cross arm brace
can be provide with the capacitor rack for mounting
surge arresters and cutouts as shown in figure
1.
Voltage/Current
Monitor Insulator (VCMI)
This
insulator provides a voltage and current signal
for the optional voltage, power factor, and var
controllers.
Vacuum
Switches
(VS)
Are
a more reliable, maintenance free alternative
to the oil switches that are supplied with the
standard rack. These switches are virtually maintenance
free and are most suitable for banks equipped
with automatic controllers.
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Control
Power Transformer
(CPT)
An
outdoor control transformer can be provide to
supply control power to the capacitor switches
and switching controls. Control can also
be provide for voltage sensing required by the
optional voltage, power factor, and var
controllers.
Transient
Inrush Reactors
(TIR)
These
reactors minimize switch wear and transients voltages
and currents resulting from capacitor energization.
Reactors are rated 40 mH. Reactors easily
install on the terminals of the capacitors.
Lightning Arresters
(LA)
Heavy
duty distribution class lightning arresters can
be provide for surge protection of the capacitor
bank and associated components.
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Pole-Top
Capacitor Bank
Ordering
Guide
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The
MVPTCä
can
be ordered
by developing the part number based on the figure
below and the suffixes in Table 1.
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Table 1 - Part Number
Suffixes
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MVPTC™
ACCESSORIES |
Model
Number Suffix |
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Blown Fuse Detection System
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BFDS
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Vacuum Switches
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VS
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Transient Inrush Reactors
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TIR
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Time/365 Day Calendar Controller
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TMC
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Power Factor Controller
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PFC
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Current Controller
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CC
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Var Controller
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VC
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Cross Arm
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CA
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Lightning Arresters
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LA
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Control Transformer
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CPT
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Voltage & Current Monitoring
Insulator
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VCMI
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Voltage Controller
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EC
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Temperature Controller
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TC
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Load break cut-outs with fuse links
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LBC
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| Cut-outs with fuse links |
C
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For example, a 300 kvar, 13.2 kV three phase pole
mounted capacitor bank with a var controller,
cutouts, surge arresters, in a three capacitor
rack would have the following part number:
NEPSI
PART NUMBER: 13.2/300/3/VC/C/LA/
Northeast
Power Systems, Inc.
66 Carey Road
Queensbury, New York 12804
Phone: 518-792-4776
Fax: 518-792-5767
E-mail:
sales@nepsi.com
Website: www.nepsi.com
Copyright © 1999
- 2009 Northeast Power Systems, Inc.
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