IQ DP-4000
SECTION 1 - INTRODUCTION TD 17548B
1
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 six
models - 4010, 4020, 4030, 4110, 4120 and 4130.
Table 1.A compares the models' features.
Model Power Module I/O
4010 Separate Source No
4020 24-48Vdc source No
4030 3-Phase No
4110 Separate Source Yes
4120 24-48Vdc source Yes
4130 3-Phase Yes
Table 1.A Model Comparison
The IQ DP-4000 measures:
• AC Line Current (each phase)
• AC Line to Line Voltage
• 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 I/O
module (models 4110, 4120, and 4130), it can protect
the loads against:
• Undervoltage
• Overvoltage
• Current Phase Loss
• Voltage Phase Loss
• Phase Reversal
• Phase Unbalance
Voltage may be directly monitored on 3-phase AC lines
within a range of 100 to 600 VAC nominal without
external potential transformers and within a range
above 600VAC to 510 KV with external potential
transformers (PTs). Current monitoring is through
external current transformers (CTs) with ratios between
5/5 to 12,800/5.
Typical applications for the IQ DP-4000 are:
• Incoming 3-Phase AC lines
• Transformer feeder circuits
• Branch circuits
• Motor starters
• 3-Phase electrical loads
Based upon transformer ratios, 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 Window also indicates the
cause of the detected alarm signal.
You choose and enter the individual setpoints by setting
the setpoint switches, so you do not need a specialized
programming language. A Configuration Disk is
included with each DP-4000. This disk contains a
Windows-95/3.XX tool that assists you with the proper
switch settings; however, it does not download settings
to the meter.
1.2 REQUIRED USER-SUPPLIED HARDWARE
In 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 - 4.15).
Note: A 2 CT arrangement will work, but will not
detect a current phase loss on L2.
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