3
Instruction Booklet
IB157001EN
Effective May 2015
Fixed capacitor banks (Unipump, Unipak, and Unipak
detuned filter) low voltage (600 V and below), NEMA 1
NEMA 3R (outdoor) enclosed versions
EATON
www.eaton.com
Receiving
Check the capacitor bank when receiving to verify that there is no
shipment or handling damage during transit . Minor damage such as
scratches or small dents to the outer enclosure will not inhibit the
capacitor’s performance, but units with large dents or leaks should
not be installed . In case of major damage, file a claim against the
carrier and also notify the nearest Eaton sales office for instructions
regarding the disposition of the capacitor bank .
Check the capacitor’s nameplate to verify that the nameplate voltage
rating matches the system and the applied voltage .
Installation
Install capacitor bank in accordance with all applicable local electrical
standards (NEC
T
NFPA 70, etc .) . Failure to properly install capacitor
bank in accordance with local electrical safety standards may cause
electrical shock, fire, and incorrect operation including reduction in
useful life of the capacitor bank .
Preparation for installation
The capacitor bank storage temperature range is –40 °C to +55 °C,
and the operating temperature range is –40 °C to +46 °C . For
optimal equipment life, prepare to install the capacitor bank in an
area free of external heat sources, such as direct sunlight .
For optimal equipment life, a harmonic resonance evaluation
should be performed prior to installation, particularly if an unfiltered
capacitor bank is used .
Installation locations
Capacitor banks should be located in a well-ventilated area with a
minimum of 3 inches of clearance around all sides and top of the
enclosure to ensure good air circulation .
Equipment rated for indoor use should be installed indoors in a dry
environment . Outdoor rated units shall be shielded from the radiant
heat of direct sunlight by a canopy or a sunshade .
Both for indoor and outdoor installations, the maximum ambient
temperature should not exceed 40 °C (104 °F) and the annual average
temperature should not exceed 35 °C (95 °F) . Higher location ambient
temperatures will cause capacitor failure and reduction in useful life of
the capacitor, including instantaneous failures .
Installation procedures
Mechanical installation
To open the capacitor bank enclosure, remove the screws holding
the top cover . Grasp the front cover and tilt it forward and down to
separate it from the base unit .
Inspect the internal capacitor cells to verify that no physical damage
has occurred during shipment or handling .
Inspect and ensure that the power conductors are secured and tight
in their terminals by applying a gentle tug on the wires on both ends .
Inspect the discharge resistors for any marks of damage or cracks
and that they are seated and intact in the terminal .
If any signs of loose or cracked discharge resistor is noticed, stop
and do not proceed with the installation and immediately notify your
nearest Eaton sales person for further instructions .
Mechanically secure the capacitor bank to either the wall or the floor
using anchor fasteners .
Electrical installation
In accordance with NEC
T
460, conductors should be sized for at
least 135% of the nameplate full load amps of the capacitor unit .
NEC 460 also requires that the power factor capacitors must be
provided with a disconnecting means and overcurrent protection .
When connecting the capacitor bank on the load side of a motor
starter overload relay, it is not necessary to provide additional
disconnecting or overcurrent protection devices .
Fuses should be rated at least 165% of rated capacitor current .
A circuit breaker should be rated at least 135% of the rated
capacitor current .
Eaton requires that all customer feeder supply wiring be 90 °C rated
stranded copper wire sized and used at its 75 °C ampacity rating .
Observe all torque requirements for electrical connections . When
making connection using crimp terminals, be sure to use the
crimping tool recommended by the terminal manufacturer . Wire and
cable connections having improper torque may cause loosening of
the electrical connections resulting in localized heating or fire . The
unit should be cleaned of any debris, metal shavings, insulation, and
conductor strippings before being put into service .
An appropriately sized ground conductor should always be
connected to the ground terminal . Lack of ground connection or
improper grounding may result in electric shock or fire or inability
of ground fault protection to operate .
Conduit entry location should be selected so as to allow the
straightest connection to the provided mechanical lugs without
compromising the conductors’ bending radii . Connect the capacitor
bank by securing power conductors into the provided mechanical
lugs and tighten to the torque provided in
Table 3
. Connect ground
conductor into grounding lug and secure by tightening per torque
requirements below .
Conduit sizes, tray sizes, and cable ampacity must be according
to the National Electrical Code or applicable electrical codes in the
customer’s area .
Proceed to connect the feeder cables to the disconnecting switch/
circuit breaker . This operation must be performed with the
equipment completely de-energized .
Table 3. Recommended torque
Torque based on conductor size
Torque based on bolt size
AWG
Pound-inch
Inches
Pound-inch
30–10
80
1/8
45
8
80
5/32
100
6–4
165
3/16
120
3
275
7/32
150
2
275
1/4
200
1
275
5/16
275
1/0–2/0
385
3/8
375
3/0–4/0
500
1/2
500
250–350
650
9/16
600
400
825
500
825
600–750
1000
otee:
N
Follow the lower torque value between the conductor size
and the bolt size .
