3 events and alarm, 9 troubleshooting – GE Industrial Solutions Entellisys 5.0 User Manual User Manual
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Metering
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4
4.8.3 Events and Alarm
Events
The Demand Alarm Function generates the following events:
• Alarm Pickup Over-Demand Flex X: Logged when demand metering alarm goes into
Over-Demand pickup state
• Alarm Over-Demand Flex X: Logged when demand metering over-demand alarm
operates. Also available as in the HMI Alarm screen.
• Alarm Dropout Over-Demand Flex X: Logged when demand metering alarm drops out
from over-demand pickup
• Alarm Pickup Under-Demand Flex X: Logged when demand metering alarm goes into
Under-Demand pickup state
• Alarm Under-Demand Flex X: Logged when demand metering under-demand alarm
operates. Also available as in the HMI Alarm screen.
• Alarm Dropout Under-Demand Flex X: Logged when demand metering alarm drops out
from under-demand pickup
4.9 Troubleshooting
Current reads zero or dashes
•
Verify that the Messenger is communicating to the CPU in the System Health screen. See
Monitoring system health on page 221
for more information.
•
Verify that the frame and CT ratings are properly configured. This information is available on
the Metering & Waveforms menu. See
Basic configuration on page 43
.
•
Verify the current exceeds 1% of CT rating. The system will zero the current if below 1%. To
verify this, trigger a waveform manually. The actual current will be displayed on the
waveform.
Voltage reads zero
•
Verify that the circuit breaker has a source for voltage data and that the source has a valid
PT assigned to it by clicking Metering on the Metering & Waveforms screen. See
for more information.
Detailed, Demand, or Harmonics metering buttons are grayed out
•
Verify that the corresponding option has been assigned to that circuit breaker. See
.