GE Industrial Solutions Entellisys 4.0 System User Manual - Manual (Page 53)

Troubleshooting 53
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4.8 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 205 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 41 .
•
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
Basic
configuration on page 41 . Also see PT Throw-Over on page 115 for more information.
Detailed, Demand, or Advanced metering buttons are grayed out
•
Verify that the corresponding option has been assigned to that circuit breaker. See Options
on page 43 .