Introduction; Genera L; Iq Data Plus I I - Westinghouse IQ DATA PLUS II User Manual

IQ DAT A PLUS I I
Section 1
IN T RODUCTION
1.0 Genera l- The I Q Data P lus
based, self-contained , door-mounted device desig ned to both
mrmitor and display electrical parameters as well as to pro­
tect i ndust rial eq uipment connected to the l i ne. (See Fig ure
1.1)
T he elect rical parameters it meters are:
•
AC line cu rrent (each phase)
•
AC li ne to l i ne voltage (all three)
•
AC li ne to neut ral voltage (fou r-wire syst ems- all t h ree)
•
W atts
•
Vars
•
Power Factor
•
Peak Demand
•
F req uency
•
Watt- hours
It monitors the AC line feeding a specific load or loads to
detect conditions which exceed user-chosen electrical
parameters. It may protect the loads aga inst such conditions
as:
•
P hase Loss
•
P hase U nbalance
•
P hase R eversal
Figure 1.1
-
Courtesy of NationalSwitchgear.com
11 ™
is a microprocessor­
•
U ndervolt age
•
Overvoltag e
IQ Da ta P lu s I I
Voltag e may be di rectly monitored on 3-phase AC lines wit hi n
a range of 1 20 t o 600 VAC nomi nal without external potential
t ransformers and wit hi n a rang e above 600 VAC to 14.4KV
with ex ternal potent ial t ransformers.
Cu rrent monitori ng is throug h ex ternal cu rrent t ransformers
wit h ratios b et ween 1 00/5 to 5000/5.
Typical applicat ions for the IQ D ata Plus I I are:
•
Incoming 3-phase AC lines
•
Transformer feeder circuits
•
Branch ci rcuits
•
Motor starters
•
3-phase electrical loads
A listing of the 15 monitored items a ppea rs on the u nit's
fa ceplate, as shown in Figu re 3.1 on page 12.
The unit will auto-range all monitored values displayed on the
screen by means of a floating decimal point and U NITS, KILO,
and M EGA LED's on t he device's faceplate. See Fig u re 3. 1.
The prog ram di recti ng the monitoring function is permanently
stored in the IQ Data Plus I I, and so there
prog rams after an AC power loss. Threshold set points, cho­
sen by t he user, are also retai ned throug hout a power loss
by means of D IP switch setti ngs.
T he non-volatile memory of the IQ Dat a Pl us I I will not only
maintain
programmed setpoi nts ,
a ll metered val ues j ust b efo re a trip conditio n. These values
ca n be st epped throug h and recorded before resetting the
unit to aid in t roub leshooting the system .
T he u n it's monitoring a nd protective fu nctions a re prepro­
g rammed in the form of softwa re su pplied as sta nda rd a nd
resident in the IQ Data Plus II m icroprocessor. A com plete
listing of the monitored values is g iven in Table 3.A on pag e 1 3.
T he Operator Pa nel, which makes u p the unit's front face, su p­
ports a Display Window which visua lly indicates the a ctua l
va lu e of the metered item selected for display. The Display
Window is a lso u sed to visually indicate the cau se of a
detected trip sig nal. A self-di a g nostic check prog ram a lso initi­
ates a malfu nction display shou ld the IQ Data Plu s II detect
a n interna l ma lfu nction.
T he u nit's prima ry fu nction is to monitor a nd display electri­
ca l pa ram eters that a re requ ired or desired by a n operator.
T he u n it's secondary fu nction is to monitor a 3-phase AC line
and, if the tolera nces a re exceeded, a protective fu nction will
enable an interna l Ala rm a nd/or Trip Relay. Contacts from
these relays may be u sed to a lert personnel, to tu rn off the
4
TD 17271A
iS
no need to reload
it will
save a "snapshot" of