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4.6.4
Inrush and Phase Rotation
First Function: INRUSH MODE
This mode requires the Model 8220 to be pre-configured (refer to § 4.5). The leads
(voltage and current) can be connected either in single-phase or balanced three-
phase mode. During steps 2, 3 and 4, it is possible to go back to the first step (step
1/4) by pressing the ◄ button.
Step 1:
•
Turn the rotary switch to the
(ready).
•
Press the ► button to move to Step 2.
Step 2:
•
The motor to be monitored should now be switched on. The Model 8220 waits
until the effective half-cycle current exceeds the current threshold for the
configured motor start.
•
The effective current calculated over one second is continuously displayed.
The Model 8220 automatically moves on to Step 3.
Step 3:
•
As soon as the motor starting threshold is reached, the timer is started (Fig.
4-18, No. 2).
•
Once the motor to be monitored is running, the Model 8220 waits until the
effective half-cycle current goes below the current set threshold (end of start
threshold). The effective current calculated over one second is continuously
displayed (Fig. 4-18, No. 1). The unit automatically moves on to Step 4.
The timer (bottom value) is active until the low current threshold has been reached.
Power Quality Analyzer Model 8220
position. The display will indicate
Figure 4-18
1
2
43
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