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9/99
Optional Features
In addition to the protection functions, the DPU1500R has load profile, oscillographic waveform capture and user-
programmable curve optional features.
Load Profile
An optional load profile feature records per-phase demand kilowatts, demand kiloVARs and line-to-ground voltages.
You can select a 5-, 15-, 30- or 60-minute time interval (Demand Meter Constant) for which the load profile record then
contains 13.3, 40, 80 or 160 days of information, respectively (default is 15 minutes and 40 days). The load profile
feature requires Wye-connected VTs to accurately measure per-phase kilowatts and kiloVARs for unbalanced loads.
For Delta-connected VTs, the load profile feature records three-phase kilowatts and kiloVARs, per-phase and ground
demand currents and line-to-line voltages. You can retrieve this load profile data only through the Windows External
Communications Program (see page 10-2), which stores the load profile and its header in a comma-delimited ASCII file.
You can view this file by using any text editor program (word processor or spreadsheet). The graph in Figure 10-2 is a
sample of the type of load profile data analysis that can be performed.
N o t U sed
M o n th
H o u r
K ilo w atts
φ A
1, 93 08 13 17 00, 6668, 6692, 6688, -116,-138,-124,11397,11404,11395
Year
D ate
M in u tes
1,9308131700,6668,6692,6688,-116,-138,-124,11397,11404,11395
1,9308131715,6678,6680,6690,-116,-128,-128,11378,11414,11393
1,9308131730,6678,6680,6690,-116,-128,-128,11378,11404,11391
Figure 10-1. Sample Load Profile for (-A-) Wye-Connected VTs and (-B-) Delta-Connected VTs
Optional Features
Vo lts
φ B
φ C
φ A
φ B
φ A
φ B
φ C
K ilo VA R s
- A -
1 8 0 0
1 6 0 0
1 4 0 0
1 2 0 0
1 0 0 0
8 0 0
6 0 0
4 0 0
2 0 0
0
-200
Figure 10-2. Load Profile Analysis
ABB Distribution Protection Unit 1500R
Not Us ed
M onth
Hour
φ C
1, 93 08 13 17 00, 6668, 6692, 122, 116, 138, 0 ,11397,11404,11395
Year
Date
M inutes
1,9308131700,6668,6692,122,116,138,0,11397,11404,11395
1,9308131715,6678,6680,123,116,128,0,11378,11414,11393
1,9308131730,6678,6680,120,116,128,0,11378,11404,11391
Per phase kWatts
f
TIME
website:www.abb.com/papd
Currents
3 φ Kilow atts
φ N
φ B
φ C
φ A
3 φ KiloVARs
- B -
Per phase kVARs
Volts
φ C
φ A
φ B
10-1
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