ABB Relion 630 Series, Technical Manual

Page: 195 / 380

4.1.5 Application
The function block can be used for any general analog signal protection, either
underprotection or overprotection. The setting range is wide, allowing various
protection schemes for the function. Thus, the absolute hysteresis can be set to a value
that suits the application.
The temperature protection using the RTD sensors can be done using the function
block. The measured temperature can be fed from the RTD sensor to the function input
that detects too high temperatures in the motor bearings or windings, for example.
When the
ENA_ADD
input is enabled, the threshold value of the internal comparator
is the sum of the Start value Add and Start value settings. This allows a temporal
increase or decrease of the level detector depending on the sign and value of the Start
value Add setting, for example, when the emergency start is activated. If, for example,
Start value is 100, Start value Add is 20 and the
ENA_ADD
input is active, the input
signal needs to rise above 120 before MAPGAPC operates.
4.1.6 Signals
Table 235: MAPGAPC Input signals
Name Type Default Description
AI_VALUE REAL 0.0 Analog input value
BLOCK BOOLEAN 0 Block overall function
BLK_OPR BOOLEAN 0 Block operate output
BLK_ST BOOLEAN 0 Block start output
FR_TIMER BOOLEAN 0 Freeze internal operate timer
ENA_ADD BOOLEAN 0 Enable start using added start value
Table 236: MAPGAPC Output signals
Name Type Description
OPERATE BOOLEAN Operated
START BOOLEAN Started signal
4.1.7 Settings
Table 237: MAPGAPC Group settings (basic)
Name Values (Range) Unit Step Default Description
Start value -10000.0 - 10000.0 - 0.1 0.0 Start value
Start value Add -100.0 - 100.0 - 0.1 0.0 Added value to start value
Operate delay time 0.03 - 200.00 s 0.01 0.03 Operate delay time
1MRS757256 F
Section 4
Protection functions
PML630/Compact Load-Shedding Solution 189
Technical Manual