Maintenance Technology April 2017 - 49

SOLUTION FOCUS

can be customized to work with your company's
asset-tracking system.

Bottom line

APRIL 2017

Information in this article was supplied by
Dave Scheuerman of Littelfuse, Chicago. Learn
more at littelfuse.com/MROPlus.

SeriouS
buSineSS?
Your Electric Motors
Need Someone
SeriouS about Motor
Maintenance & repair
OEM Parts/Life 0% Core Loss
0% Efficiency Loss Root Cause
Non-Damaging

Repairs

LA

R

Class RK5 fuses are rated to 200,000 A
and provide current limitation. They don't
provide the level of current limitation that the
newer Class RK1 fuses offer. Current limitation is
extremely important. It is used to reduce the danger of arc-flash
hazards so that workers can wear less PPE. Current limitation
also improves the short-circuit current rating (SCCR) and
simplifies selective coordination.
3. Consolidate. Give your inventory printout to your preferred
fuse vendor and ask for a consolidated inventory list. The
vendor will know which modern fuses to substitute for older
types, know which types fit which fuse holders, and be able to
cross-reference with other suppliers. Based on the experience of
Littelfuse, typical savings for a large manufacturer range from
$18,000 to $30,000.
4. Upgrade to indicating fuses. Indicating fuses are a commonsense way to decrease downtime. When a fuse opens, the
maintenance worker can quickly identify which fuse or fuses
need to be replaced. In contrast, when indicating fuses are not
used, significant downtime can occur and personal safety can
be jeopardized.  
When one or more fuses blow and shut down a system or
production line, maintenance workers will often ignore OSHA
and NFPA 70E safety requirements and go into a live panel
to meter each fuse to determine any that have opened. This
extremely dangerous approach can create a significant safety
hazard for the worker and anyone else nearby. Best-case
scenario, the worker de-energizes the system and then pulls the
fuses to check for those that have opened. This process, though,
can be time consuming and lead to increased downtime. The
opened-fuse visual indication of indicator fuses helps eliminate-or at least significantly reduces-these potential issues.
5. Get organized. Some fuse vendors will print bin labels with the
facility's part numbers, reorder numbers, and barcodes. These

GE

Right. Effective consolidation and
organization of a site's fuse inventory
provides many benefits.

our

Above. Plants depend on hundreds of
fuses, in panels such as this one, to
protect workers and equipment.

Any time of year is a good time to "spring clean"
your fuse inventory. The benefits are numerous.
Sites can decrease downtime by standardizing on
indicating fuses that allow open fuses to be identified
quickly. Modern fuses simplify selective coordination that can greatly limit the scope and potential
magnitude of an outage.
Furthermore, by using current-limiting
fuses, operations help protect equipment
and workers from faults and dangerous
arc flash. In addition to reduced
downtimes, better system coordination
in the event of a fault, and lower arcflash hazards due to optimal currentlimiting protection, considerable cost
benefits can be realized. MT

ST L O N

Improved Reliability
* Increased Uptime
* Energy Saving

Read t he whi t e papers: mot orsaferepairs.co m/MT

dreisilker.com

800.922.1882

MAINTENANCETECHNOLOGY.COM | 49


http://www.littelfuse.com/MROPlus http://www.motorsaferepairs.com/mt http://www.motorsaferepairs.com/mt http://www.dreisilker.com http://www.MAINTENANCETECHNOLOGY.COM

Table of Contents for the Digital Edition of Maintenance Technology April 2017

Maintenance Technology April 2017 - 1
Maintenance Technology April 2017 - Cover1
Maintenance Technology April 2017 - Cover2
Maintenance Technology April 2017 - 1
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