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Phase Angle Conventions
For tests that follow, refer to Figure 3-1 for phase angle and metering conventions used in the DPU1500R. In general,
all angles are in "degrees leading."
Metering Test
1. Apply 3-phase voltages and currents as shown in Figure 11-2. The values for these are:
•
Ia (L1) = 3.0 A
•
Ib(L2) = 3.0 A
•
Ic (L3) = 3.0 A
•
Van (UL1) = 120.0 V
•
Vbn (UL2) = 120.0 V
•
Vcn (UL3) = 120.0 V
2. From the MMI Main Menu, press "E" twice to gain access to the Metering Menu.
3. Press "E" on the "Load" choice. The following should be within the ranges listed:
•
Ia (L1) = 300.0
•
Ib (L2) = 300.0
Maintenance and Testing
)
0°
)
240°
)
120°
)
0°
)
240°
)
120°
0° ) (±6 A; the ±6A was calculated by taking 1% of the product of the pickup
setting [6.0 A] x the Phase CT Ratio [100]: .01 x [6.0 x 100] = 6.)
)
240°
(±6 A)
+
Control
_
Power
Ia (L1)
Ib (L2)
3-Phase
Ic (L3)
Currents
In
Van (UL1)
Vbn (UL2)
3-Phase
Vcn (UL3)
Voltage
Vn (UN)
Figure 11-2. Metering Test
ABB Distribution Protection Unit 1500R
1
2
54
53
52
51
DPU1500R
50
49
48
47
31
32
33
34
website:www.abb.com/papd
11-5
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