ABB Distribution Protection Unit 1500R
11-7
Maintenance and Testing
9/99
website:www.abb.com/papd
Figure 11-3. Test Circuit for Time Overcurrent, 50P-1 (3I>>1), 2-Phase 50P(3I>>) and 46 (Insc>) Functions
Figure 11-4. Test Circuit for 51N (IN>), 50N-1(IN>>1), 50P-2 (3I>>2), 50N-2 (IN>>2), 50P-3 (3I>>3), 50N-3
(IN>>3) and 2-Phase 50P (3I>>) Functions
+
_
1
2
54
53
52
51
31
32
33
34
Ia (L1)
Ib (L2)
Van (UL1)
Vbn (UL2)
Vcn (UL3)
Vn (UN)
Control
Power
1-Phase
Current
3-Phase
Voltage
DPU1500R
3
+
_
1
2
54
53
52
51
31
32
33
34
Ic (L3)
In
Van (UL1)
Vbn (UL2)
Vcn (UL3)
Vn (UN)
Control
Power
1-Phase
Current
3-Phase
Voltage
DPU1500R
3
50
49
48
47