Commissioning guide – GE Industrial Solutions ASPMETER commiss User Manual
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COMMISSIONING GUIDE
ASPMETER
DET-757
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6. Current Alarms.
The instantaneous current alarm setup parameters define the maximum (high alarm) and minimum (low alarm) limits for all branch and main circuits monitored by
the ASPMETER. Instantaneous current alarms are ON only if the alarm conditions are met. These alarms are reset automatically (alarm is turned OFF or cleared when
circuit current is within the normal range).
High Alarm Thresholds
Type the instantaneous current value, expressed as a percentage of the breaker size (default = 60%). When the circuit current exceeds that value, the high current
alarm is activated. To disable any alarms, set the specific high alarm threshold to zero.
Example: If the threshold is set to 60%, the high alarm would be activated when instantaneous current for a 20 A breaker exceeds 12 A (i.e. 20 A x 0.60).
Low Alarm Thresholds
Type the instantaneous current value, expressed as a percentage of the breaker size (default = 5%). When the circuit current falls below that value, the low current
alarm is activated. To disable any alarms, set the specific low alarm threshold to zero.
Example: If the threshold is set to 5%, the low alarm would be activated when instantaneous current for a 20 A breaker drops below 1 A (i.e. 20 A x 0.05).
Hysteresis
Type the value, expressed as a percentage of the alarm threshold, that defines how much the circuit current must fall below the High alarm threshold or rise above the
Low alarm threshold, to determine the alarm’s “OFF” state (default = 5%; non-latching only).
Example: If hysteresis is set to 5%, the “OFF” state for a high alarm threshold of 12 A would be at 11.4 A and below (i.e. 12 A minus (12 A x 0.05)), while the “OFF” state
for a low alarm threshold of 1 A would be at 1.05 A and above (i.e. 1 A plus (1 A x 0.05)).
Time
Amps
1
2
3
4
High
High + hysteresis
Low + hysteresis
Low
1 High Alarm Set On
2 High Alarm Set Off
3 Low Alarm Set On
4 Low Alarm Set Off