Eaton COOPER POWER SERIES User manual

Current-Limiting – Type NXC® (C-Rated) Fuse
Installation Instructions
COOPER POWER
SERIES
Fusing Equipment
MN132014EN Effective November 2016 Supersedes July 2005 (S240-61-1)

ii InstallatIon InstructIons MN132014EN November 2016
DISCLAIMER OF WARRANTIES AND LIMITATION OF LIABILITY
The information, recommendations, descriptions and safety notations in this document are based on Eaton Corporation’s
(“Eaton”) experience and judgment and may not cover all contingencies. If further information is required, an Eaton sales
office should be consulted. Sale of the product shown in this literature is subject to the terms and conditions outlined in
appropriate Eaton selling policies or other contractual agreement between Eaton and the purchaser.
THERE ARE NO UNDERSTANDINGS, AGREEMENTS, WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING WARRANTIES
OF FITNESS FOR A PARTICULAR PURPOSE OR MERCHANTABILITY, OTHER THAN THOSE SPECIFICALLY SET OUT IN ANY
EXISTING CONTRACT BETWEEN THE PARTIES. ANY SUCH CONTRACT STATES THE ENTIRE OBLIGATION OF EATON. THE
CONTENTS OF THIS DOCUMENT SHALL NOT BECOME PART OF OR MODIFY ANY CONTRACT BETWEEN THE PARTIES.
In no event will Eaton be responsible to the purchaser or user in contract, in tort (including negligence), strict liability or
otherwise for any special, indirect, incidental or consequential damage or loss whatsoever, including but not limited to
damage or loss of use of equipment, plant or power system, cost of capital, loss of power, additional expenses in the use of
existing power facilities, or claims against the purchaser or user by its customers resulting from the use of the information,
recommendations and descriptions contained herein. The information contained in this manual is subject to change without
notice.

iiiInstallatIon InstructIons MN132014EN November 2016
Contents
DISCLAIMER OF WARRANTIES AND LIMITATION OF LIABILITY ................................... ii
SAFETY FOR LIFE .........................................................................iv
SAFETY INFORMATION ....................................................................iv
Safety instructions.............................................................................. iv
GENERAL ................................................................................ 1
REMOVAL ................................................................................ 1
INSTALLATION ............................................................................ 1

iv
Current-Limiting – Type NXC® (C-Rated) Fuse
InstallatIon InstructIons MN132014EN November 2016
Safety for life
Eaton meets or exceeds all applicable industry standards relating to product safety in its Cooper Power™ series products.
We actively promote safe practices in the use and maintenance of our products through our service literature, instructional
training programs, and the continuous efforts of all Eaton employees involved in product design, manufacture, marketing, and
service.
We strongly urge that you always follow all locally approved safety procedures and safety instructions when working around
high voltage lines and equipment, and support our “Safety For Life” mission.
Safety information
The instructions in this manual are not intended as a
substitute for proper training or adequate experience in the
safe operation of the equipment described. Only competent
technicians who are familiar with this equipment should
install, operate, and service it.
A competent technician has these qualifications:
 Is thoroughly familiar with these instructions.
 Is trained in industry-accepted high and low-voltage safe
operating practices and procedures.
 Is trained and authorized to energize, de-energize, clear,
and ground power distribution equipment.
 Is trained in the care and use of protective equipment
such as arc flash clothing, safety glasses, face shield,
hard hat, rubber gloves, clampstick, hotstick, etc.
Following is important safety information. For safe
installation and operation of this equipment, be sure to read
and understand all cautions and warnings.
Hazard Statement Definitions
This manual may contain four types of hazard statements:
DANGER
Indicates an imminently hazardous situation which, if
not avoided, will result in death or serious injury.
WARNING
Indicates a potentially hazardous situation which, if not
avoided, could result in death or serious injury.
CAUTION
Indicates a potentially hazardous situation which, if not
avoided, may result in minor or moderate injury.
CAUTION
Indicates a potentially hazardous situation which, if not
avoided, may result in equipment damage only.
Safety instructions
Following are general caution and warning statements that
apply to this equipment. Additional statements, related to
specific tasks and procedures, are located throughout the
manual.
DANGER
Hazardous voltage. Contact with hazardous voltage will
cause death or severe personal injury. Follow all locally
approved safety procedures when working around high-
and low-voltage lines and equipment. G103.3
WARNING
Before installing, operating, maintaining, or testing this
equipment, carefully read and understand the contents
of this manual. Improper operation, handling or
maintenance can result in death, severe personal injury,
and equipment damage. G101.0
WARNING
This equipment is not intended to protect human
life. Follow all locally approved procedures and safety
practices when installing or operating this equipment.
Failure to comply can result in death, severe personal
injury and equipment damage. G102.1
WARNING
Power distribution and transmission equipment must
be properly selected for the intended application. It
must be installed and serviced by competent personnel
who have been trained and understand proper safety
procedures. These instructions are written for such
personnel and are not a substitute for adequate training
and experience in safety procedures. Failure to properly
select, install or maintain power distribution and
transmission equipment can result in death, severe
personal injury, and equipment damage. G122.2
!
SAFETY
FOR LIFE
!
SAFETY
FOR LIFE

1
Current-Limiting – Type NXC® (C-Rated) Fuse
InstallatIon InstructIons MN132014EN November 2016
General
Standard safety procedures should be followed when
removing and installing NXC®fuses on capacitor blocks.
Removal
1. Remove all power from capacitor block.
2. Allow capacitors to discharge internally for five minutes;
then manually discharge all capacitors, including the
suspected failed capacitor unit.
3. Remove fuse leader from capacitor bushing.
4. Remove fuse from bus bar and retain mounting
hardware for installation of replacement fuse.
Installation
NXC fuses may be mounted by various means on capacitor
blocks. This instruction bulletin provides information for the
four standard configurations as shown in Figure 1 through
Figure 4.
WARNING
NXC fuses should be installed with the leader pointing
down (see Figure 1 through Figure 4).
1. Verify that the proper rated fuse is being installed by
checking information provided on fuse identification
label.
2. Remove leader wire from the hex-head bolt supplied
with the fuse. If a hose clamp is supplied with the
replacement fuse, remove the clamp from the fuse
before fuse installation (see Figure 5).
3. Secure the fuse to the bus bar with the .50-13 UNC-2A
x .75 stainless steel hex reg bolt supplied with the fuse
or use the mounting hardware retained from the fuse
that was removed.
CAUTION
Do not apply any type wrenching tool directly on the
fuse when installing it. Sufficient torque can be applied
with the hand for a proper fit.
4. Check that the recommended spacing exists between
end of main fuse housing and closest conductive part
on capacitor. Refer to Figure 1 through Figure 4 as
applicable.
3.0"
(+ 1/2", -0")
Capacitor
NXC Fuse
Bus Bar
Bolt or Stud Mounting
Blown Fuse
Indication
Figure 1. NXC fuse angle-mounted on vertical capacitor
bank.
4.0"
(+ 1/2", -0")
Capacitor
NXC Fuse
Bus Bar
Bolt or Stud Mounting
Figure 2. NXC fuse vertically mounted on vertical
capacitor bank.

2
Current-Limiting – Type NXC® (C-Rated) Fuse
InstallatIon InstructIons MN132014EN November 2016
3.0"
(+ 1/2", -0")
Capacitor
NXC Fuse
Bolt or Stud
Mounting
Bus Bar
Figure 3. NXC fuse mounted on horizontal capacitor
bank.
4.0"
(+1/2", -0")
Capacitor
NXC Fuse
Bolt or Stud Mounting
Figure 4. NXC fuse vertically mounted on horizontal
capacitor bank.
ote:N The following recommended spacing between
potentially live elements of a blown fuse and
conductive parts of a capacitor is the same for all
recommended applications of the NXC fuse. Smaller
spacing will result in reduced system BIL after
the fuse has blown. Larger spacing will create an
excessively long fuse leader which could bounce over
and short out adjacent capacitors when it is ejected
from a blown fuse.
5. Secure fuse leader to capacitor bushing connector
and recheck spacing. Leader should be snug and not
contain any slack.
6. Cut off excessive leader wire which extends beyond
capacitor bushing.
ote:N A blown fuse is indicated by the fuse leader hanging
from the capacitor bushing and not connected to the
fuse.
CAUTION
This product as designed and packaged by Eaton
is classified by the USDOT as Not Regulated as an
Explosive.The leader wire must be held in place by
attaching the wire under the hex-head bolt or clamped
to the fuse body to maintain this classification when an
un-operated fuse is transported.
As Shipped from the Factory
Hose Clamp
Figure 5. NXC fuse shown with leader retained for
transportation.

3
Current-Limiting – Type NXC® (C-Rated) Fuse
InstallatIon InstructIons MN132014EN November 2016
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Eaton
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Cleveland, OH 44122
United States
Eaton.com
Eaton’s Power Systems Division
2300 Badger Drive
Waukesha, WI 53188
United States
Eaton.com/cooperpowerseries
© 2016 Eaton
All Rights Reserved
Printed in USA
Publication No. MN132014EN
November 2016
Eaton is a registered trademark.
All trademarks are property
of their respective owners.
For Eaton‘s Cooper Power series product
information
call 1-877-277-4636 or visit:
www.eaton.com/cooperpowerseries.
!
SAFETY
FOR LIFE