Page 20 - SPARKS APRIL 2013 1-28 LOW RES

sparks
ELECTRICAL NEWS april 2013
20 cables and cable accessories
Advanced stand-alone motor protection relays
WITH the increasing demand for caution and the raising of safety
standards inmodern industries, many end-user clients are looking
for methods to eliminate the need for electrical staff to open MCC
cubicles in order to determine the nature of a motor trip or to
adjust motor protection setting parameters. To do so would usu-
ally necessitate wearing special safety electrical insulation clothing
that is inconvenient and time consuming.
The KE range protection relay can optionally have a door
mounted fault indication display as well as an infrared data acqui-
sition and transfer facility that is both inexpensive and easy to use.
A receiver/transmitter IRDA is simply attached to a communica-
tions cable that connects to a laptop. The housing on the IRDA
side is magnetic and will‘fasten’itself to the door-mounted RDU so
operating staff can adjust, read or save data directly using a laptop.
The KE relay is also capable of recording real power versus appar-
ent power utilisation for analysingmotor efficacy. It has outstand-
ing protection benefits that include earth insulation lockout, user
selectable instantaneous or IDMT earth leakage tripping charac-
teristics, programmable limitation to start attempts and up to 2
000 event records, as well as a separate listing of the last 60 faults
together with current and voltage details.
In flameproof applications, the IRDA is a time saver since the
flameproof door need not be removed. NewElec has developed
an explosion proof variety of the IRDA that allows the operator to
downloadmotor information onto a USBmemory stick.
Enquiries: (012) 327-1729
COMTEST Fluke has announced
the introduction the Fluke
805 vibrationmeter, a
portablemultifunction
vibration screening tool
that provides quantifi-
able information on a
bearing and the overall
health of motors and
other rotating equip-
ment. The Fluke 805
is ideal for frontlineme-
chanical troubleshoot-
ing teams that need
reliable and repeatable
measurements of rotat-
ing equipment tomake
imperative go/no-go
maintenance decisions.
Most vibration pens
and other screening
devices, currently on the
market, provide an overall
number for vibration
condition and some also
provide an overall number
for bearing condition. Due
to inadequate design and
measurement technology, users
consider most vibration products to be unreliable
and difficult to understand. Some experts even refer
to themas toys!
Fluke conducted customer research and the find-
ings highlighted shortcomings in other vibration
screening pens and devices. Fluke’s design engineers
then responded by producing the 805 vibration
meter – certainly not a toy – but a vastly superior
meter on every front. It provides quantifiable results
of bearing condition, overall vibration and tempera-
ture, assesses condition severity using text-based
alerts, and exports and trends data using built-in
templates. It is a vastly superior, more accurate, and
more user-friendly tool that improves day-to-day
machine checks, so users can keep their facilities and
plants up and running.
The Fluke 805measures
• Overall vibration from 10 to 1 000Hz, providing a
four-level severity assessment for overall vibration
and bearing condition.
• Identifies bearingcondition (Crest factor Plus, CF+)
by detectingpeaks in the vibration signal readings
of roller bearings from 4 000Hz to 20 000Hz, and
using a proprietary algorithm to interpret severity
to determine if the bearing is going bad.
• Measures surface temperature using an infra-
red sensor which automatically measures con-
tact temperature and displays it along with the
vibration reading for a broader understanding of
machine health.
The Fluke 805 handheld vibrationmeter has a
unique sensor tip design that minimises measure-
ment variations caused by device angle or contact
pressure. This reduces operator error and improves
the accuracy and repeatability of quick vibration
screening. Themeter also provides a severity scale
for both overall vibration and bearing condition
readings, deliveringmore information than com-
parable vibration pens. Logged data can be easily
uploaded into Excel to create trending reports.
Enquiries:(011)608-8520
Newmeter redefines
vibration screening