IQ DP-4000
SECTION 1 - INTRODUCTION
1 .1 INTRODUCTION
The IQ DP-4000 is a microprocessor-based monitoring
and protective device that provides electrical metering
and system voltage protection. This device is a
compact,
self-contained,
panel-mounted
device
designed to replace numerous individual meters, relays,
and recorders. The IQ DP-4000 is available in four
models - 401 0, 4030, 41 1 0, and 41 30. Table 1 .A
compares the models' features.
Model
Power Module
401 0
Separate
Source
4030
3-Phase
41 1 0
Separate
Source
41 30
3-Phase
Table 1.A Model Comparison
The IQ DP-4000 measures:
•
AC Line Current (each phase)
•
AC Line to Line Voltage
No
No
Yes
Yes
•
AC Line to Neutral Voltages (for 4 wire systems)
•
Watts
•
Vars
•
VA
•
Power Factor (apparent and displacement)
•
Demand (Watts, Vars, VA, Currents)
•
Frequency
•
% THD (currents and voltages)
•
Watt-hours
•
Var-hours
•
VA-hours
The IQ DP-4000 monitors the ac line feeding a specific
load or loads and detects conditions that exceed your
chosen parameters. In all cases, it detects the following
listed conditions. If equipped with the optional 1/0
module (models 41 1 0 and 41 30), it can protect the
loads against:
•
Undervoltage
•
Overvoltage
•
Current Phase Loss
•
Voltage Phase Loss
•
Phase Reversal
•
Phase Unbalance
TD 1 7548A
Voltage may be directly monitored on 3-phase AC lines
within a range of 1 20 to 600 VAC nominal without
external potential transformers and within a range above
600VAC to 5 1 0
KV
with external potential transformers
(PTs) . Current monitoring is through external current
transformers (CTs) with ratios between 5/5 to 1 2,800/5.
Typical applications for the IQ DP-4000 are:
•
Incoming 3-Phase AC lines
•
Transformer feeder circuits
•
Branch circuits
•
Motor starters
•
3-Phase electrical loads
The device will automatically display the appropriate unit
value (in Units, Kilo-Units, or Mega-Units) of the item
displayed on the screen. The values have a floating
decimal point.
The program directing the monitoring function is
permanently stored in the IQ DP-4000. The setpoints
you choose are also retained by the non-volatile
EEPROM memory.
The non-volatile memory of the IQ DP-4000 will save a
snapshot of all metered values just after an alarm
condition. The IQ DP-4000 can store two alarm
conditions at the same time. You can view the snapshot
for each alarm, and record the values before or after
resetting the unit.
The operator panel, the unit's front faceplate, has a
display window that indicates the actual value of the
selected item. The Display W indow also indicates the
cause of the detected alarm signal.
You choose and enter the individual setpoints by setting
the setpoint switches. You can easily program the
device in the field because you do not need a
specialized programming language. With the new
Setpoint Switch design, you can program the unit to
handle a large number of current transformer and
voltage transformer ratios.
1 .2 REQUIRED USER-SUPPLIED HARDWARE
I n all instances, it is recommended that the IQ DP-4000
use three user-supplied external current transformers,
with 5 amp secondaries, for metering current functions.
In retrofit cases, where only two current transformers
are provided, refer to the sample wiring diagrams
(Figures 4.4 - 4 . 1 5).
Note: A 2 CT arrangement will work, but will not
detect a current phase loss on
L2.
For voltages above 600V, you must supply potential
transformers to step down the voltage to match the
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