Pickup-Time Overcurrent - ABB DPU 1500R Instruction Book

ABB Distribution Protection Unit 1500R
•
Ic (L3) = 300.0
•
In = 0.0
•
kVan (UL1) = 12.0
•
kVbn (UL2) = 12.0
•
kVcn (UL3) = 12.0
•
kW-A (L1) = 3600
•
kW-B (L2) = 3600
•
kW-C (L3) = 3600
•
kW-3P = 10800
•
kVAR-A (L1) = 0
•
kVAR-B (L2) = 0
•
kVAR-C (L3) = 0
•
kVAR-3P = 0
•
I = 0
0
•
I = 300
1
•
I = 0
2
•
kV = 12.00
1
•
kV = 0
2
•
PF = 1.00
•
Freq = 60.00
4. Connect the DPU1500R as shown in Figure 11-4. Apply 3.0 A to C (L3)-Phase and the Neutral. Read the current
from the Metering Menu as above. The currents Ic and In should be 300.0 ±6 A.
Pickup—Time Overcurrent
Follow these steps to check the time overcurrent of the pickup current.
1. Connect the DPU1500R as shown in Figure 11-3.
2. Apply 5.5 A, gradually increasing the current until the PICKUP LED just lights. This should be within ±3% of the
pickup (see Table 11-1) or ±0.18 A (±18.0 A primary). This confirms the continuity and accuracy of phases A (L1)
and B (L2).
3. Decrease the input current to 0 and reset targets, if necessary, by pressing the target reset push button.
4. Connect the DPU1500R as shown in Figure 11-4. Repeat Step 2 to confirm the continuity and accuracy of
phase C (L3) and Neutral.
11-6
)
120° (±6 A)
(±6 A)
)
0° (±0.12 kV)
)
240° (±0.12 kV)
)
120° (±0.12 kV)
(±144 kW)
(±144 kW)
(±144 kW)
(±432 kW)
(±144 kW)
(±144 kW)
(±144 kW)
(±432 kW)
(±6 A)
)
0° (±6 A)
)
0° (±6 A)
)
0° (±0.12 kV)
)
0° (±0.12 kV)
Lagging or Leading
(± 0.01 Hz)
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Maintenance and Testing