TD 17271A
6.1.3 Line Frequency -
The IQ Data Plus II can accept a
line frequency of either 50 or 60 Hz. Selection is made at
SW1,
No. 6.
Place the switch in the:
•
OFF position for a 50 Hz line
•
ON position for a 60 Hz line
6.1.4 Overvoltage, Undervoltage, Phase Unbalance -
Instantaneous or Time Delay on Trip/Alarm -
When an
overvoltage, undervoltage or phase unbalance condition is
first detected, the IQ Data Plus II can actuate its Alarm and
Trip Relays immediately; or the trip condition can be selected
to continuously persist for several seconds before it actuates
the Alarm and Trip Relays.
Switch
SW1, No. 7
must be set to correspond to the desired
action on over/under voltage/phase unbalance detection. Set
this switch to the:
•
OFF position for an immediate response
•
ON position for a delayed response
When the ON position is selected, the time delay can be pro
grammed using switches
SW6, Nos. 5, 6 and 7.
(See Para
graph 6.1 .23.)
6.1.5 3 Wlre/4 Wire Line -
The IQ Data Plus II can be used
to monitor either a 3-conductor or 4-conductor AC line. An
example of a 4-wire system is a case in which a transformer's
secondary is wired in a wye configuration with the XO neu
tral terminal ground brought out as the fourth wire. In this case
the XO fourth wire connects with the Neutral Terminal on the
IQ Data Plus ll's chassis. (See Figure 2.1.)
Switch
SW1, No. 8
must be set to correspond to the chosen
wiring configuration. Set this switch to the:
•
OFF position for a 3-wire wiring configuration
•
ON position for a 4-wire wiring configuration
When the OFF position is selected for the 3-wire configura
tion, the Display Window does not display the 3 1ine-to-neutral
AC line measurements of the Operator Panel's menu. The
measurements
not
displayed are:
•
VA-N Volts RMS
•
V
B·N
Volts RMS
•
V
C·N
Volts RMS
31
IQ DATA PLUS II
Table 6.8
CT RATIO SETTINGS
CT
SW1
Switch Settings(1l
Ratios
1
2
3
4
5
100:5
ON
ON
ON
ON
ON
150:5
OFF
ON
ON
ON
ON
200:5
ON
OFF
ON
ON
ON
250:5
OFF
OFF
ON
ON
ON
300:5
ON
ON
OFF
ON
ON
400:5
OFF
ON
OFF
ON
ON
500:5
ON
OFF
OFF
ON
ON
600:5
OFF
OFF
OFF
ON
ON
800:5
ON
ON
ON
OFF
ON
1000:5
OFF
ON
ON
OFF
ON
1200:5
ON
OFF
ON
OFF
ON
1500:5
OFF
OFF
ON
OFF
ON
1600:5
ON
ON
OFF
OFF
ON
2000:5
OFF
ON
OFF
OFF
ON
2500:5
ON
OFF
OFF
OFF
ON
3000:5
OFF
OFF
OFF
OFF
ON
3200:5
ON
ON
ON
ON
OFF
4000:5
OFF
ON
ON
ON
OFF
5000:5
ON
OFF
ON
ON
OFF
(1) All other combinations are invalid.
