CET Electric Technology
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4.3.6
Transients Voltage
The iMeter 6 provides Transient Capture capability by detecting voltage disturbances with a maximum resolution
of 80µs. The iMeter 6 provides transient detection for voltage quality monitoring and records the detected event
in the
PQ Log
with timestamp and event type. The programming of the Transient setpoint is supported via the
Web Interface or communications. The Transient setpoint provides the following setup parameters:
Parameter
Definition
Options/Value, Default*
Enable
Transient Enable
Enable*/Disable
Threshold
Specify the Transient threshold as a percentage of nominal voltage
5% to 500% Ullnominal,
35%*
Trigger1
Specify the action taken when the Dip/Swell/Interruption setpoint actives
DOx / DRx / HS DRx / WFRx / SMTP, WFR1*
Trigger2
Specify the action taken when the Dip/Swell/Interruption setpoint actives
DOx / DRx / HS DRx / WFRx / SMTP, N/A*
Table 4-9 Transient Setpoint Setup Parameters
For the Transient detection to work correctly, it’s critically important to set the
Ull
nominal
parameter correctly
with the nominal line-to-line voltage on the secondary (meter) side.
4.4
Setpoints
The iMeter 6 comes standard with 24 user programmable setpoints which provide extensive control by allowing
a user to initiate an action in response to a specific condition. The Setpoint #1 to #16 are standard Setpoints and
the Setpoint #17 to #24 are High-Speed Setpoints. Typical setpoint applications include alarming, fault detection
and power quality monitoring.
Figure 4-1 Over Setpoint
Figure 4-2 Under Setpoint
