GE Power Management
ALPS Advanced Line Protection System
C-19
APPENDIX C C.3 POINT LISTS
C
TABLE NOTES:
1. The upper and lower 16-bit portions of all the 32-bit values reported by ALPS are assigned to two separate points. To
read a 32-bit value, it is necessary to read both the upper and lower 16-bit portions and concatenate these two values
to form a 32-bit value and interpret the result according to the format associated with the value.
2. An event object will be generated for this point if the current value of the point changes by an amount greater than or
equal to two percent of its previous value.
3. An event object will be generated if the frequency changes by 0.05 Hz or more from its previous value.
4. An event object will be generated if the current value of a point is in any way changed from its previous value.
5. The Time-Stamp of various Analog Inputs is reported in DNP Time Object format. The 48-bit absolute time is allocated
to three separate points that need to be concatenated and interpreted as a DNP Time Object (Variation 1).
6. The units for Fault Location are determined by the value read at the Point corresponding to Fault Location Units. The
Fault Location units can be either Miles or Km as per the Fault Location Unit value.
C.3.6 ANALOG OUTPUT, ANALOG OUTPUT BLOCK
Refer to Chapter 2 for a detailed description of the setpoints listed in the table below. The formats, ranges and units for var-
ious setpoints are as described in the Instruction Book but for the following exceptions in these notes. Refer to Appendix B,
for a description of the procedure to View/Change the ALPS setpoints.
Table C–7: POINT LIST: OBJECTS 40 & 42 (Sheet 1 of 8)
ANALOG OUTPUT (OBJECT 40)
ANALOG OUTPUT BLOCK (OBJECT 41)
INDEX
DESCRIPTION
FORMAT / UNITS
REMARKS
0 Edit Settings Group Number Note 1
1 Z1 Phase Distance
2 Z1 Phase Reach
3 Z1 Phase Level Detector
4 Z1 Ground Distance
5 Z1 Ground Reach
6 Z1 Ground Characteristic
7 Z1 Ground React. Mho Supervision Reach
8 Z1 Ground K0
9 Z1 Ground Level Detector
10 Z1 Blocking Supervision
11 Z1 Ground Characteristic Angle (ALPSQUAD)
…Reserved…(ALPS/LPS)
12 Z1 Right Resistive Ground Blinder (ALPSQUAD)
…Reserved….(ALPS/LPS)
13 Z2 Phase Distance
14 Z2 Phase Reach
15 Z2 Phase Characteristic Angle
16 Z2 Ground Distance
17 Z2 Ground Characteristic
18 Z2 Ground Reach
19 Z2 Ground Characteristic Angle
20 Z2 Timers
21 Z2 Phase Timer
22 Z2 Ground Timer
23 Z2 Right Resistive Ground Blinder (ALPSQUAD)
…Reserved…(ALPS/LPS)
24 Z3 Phase Distance
