IQ DATA PLUS I I
T D 17271 A
Section 6
APPLICATION CONSIDERATIONS
6.0 General
- This Section contains various considerations
to be kept in mind when applying the IQ Data Plus II to a
specific application. It is designed primarily for the systems
or application engineer responsible for making up the wiring
plan drawings.
It is strongly suggested that all earlier Sections - especially
2 and 3 - be read thoroughly before proceeding.
6.1 DIP Switch Settings
- A number of DIP switches,
located on the right rear side of the chassis, tailor each IQ
Data Plus II to a specific application The switches provide 18
selection groupings which must be set by the user during
installation. Once these settings are determined, they should
be recorded on a copy of the Installation Record Sheet, shown
in Tables 6.A, 6.C, 6.H, 6.K, 6.N, 6.0. The filled-in Record Sheet
should then be made available to the installation team and
to maintenance personnel. Paragraph 4.3 describes how to
physically set the switches.
Table 6.A
IQ DATA PLUS II INSTALLATION RECORD SHEET: SW1
Setting
Description
DIP
Slide
ON/OFF
Switch
Switch
Combinations
1
-
2
-
The ratio of the external current transformers
=
__
:5
3
-
(1 00/150/200/250/300/400/500/600/800/1000/1200/1500/1600/
4
-
2000/2500/3000/3200/4000/5000)
Refer to Table 6. 8
5
-
6
-
Line frequency ON
=
60 Hz; OFF
=
50 Hz
SW1
7
-
Action on over/undervoltage/phase unbalance detection.
Action
=
immed. (Delay/immediate)
OFF
=
immediate; ON
=
delay
8
-
AC line wiring
=
3 wire
ON
=
4 wire
3 wire or 4 wire
OFF
=
3 wire
6.1 .1 Current Transformer Ratio
-
The ratio of the user
provided external current transformers can vary from 100:5
to 5000:5. Switch
SW1, Nos. 1 thru
5
must be set to cor
respond to the external current transformer's ratio, as listed
in Table 6.8.
The CT's must be chosen so that at least 20% of the pri
mary rated current is drawn. The 1 % accuracy of the IQ
Data Plus II is valid only above 20% of the current rating.
Below 2% of the primary rated current, the IQ Data Plus
II reads zero current.
30
6.1 .2 Display Current
-
The AC line current level appear
ing in the Display Window is auto ranged to represent
amperes to kiloamperes.
