Timing Tests; Figure 11-5 Test Circuit For Timing And Recloser Lockout - ABB DPU 1500R Instruction Book

ABB Distribution Protection Unit 1500R

Timing Tests

Follow these steps to test the timing of the DPU1500R:
1. Connect the DPU1500R as shown in Figure 11-5.
2. Apply a fault current of 12 A to the relay. This current is 2x the default pickup current of 6.0 A. The relay should trip
between 14.5 and 16.7 seconds (derived from the Extremely Inverse Curve, Figure 1-4, by using the default
values in Table 11-1).
3. Apply a fault current of 24 A to the relay (4x the default pickup current). The relay should trip between 3.0 and 3.5
seconds.
4. Apply a fault current of 36 A to the relay (6x the default pickup current). The relay should trip between 1.4 and 1.6
seconds.
11-10
+
Control
_
Power
Ia (L1)
1-Phase
Current
Start/Stop
Timer
Van (UL1)
Vbn (UL2)
3-Phase
Vcn (UL3)
Voltage
Vn (UN)
Figure 11-5. Test Circuit for Timing and Recloser Lockout
website:www.abb.com/papd
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DPU1500R
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Maintenance and Testing