Omicron CPC 100, Руководство пользователя

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CPC 100 V 3.20
Transformer - 8
Transformer
Use the Demag test card to demagnetize the transformer core. Magnetized transformers may
easily saturate and draw an excessive inrush current upon energization. Since the forces on the
windings due to high inrush current may cause damage or even breakdown, it is desirable to
avoid them.
The CPC 100 Demag test card requires a
CP SB1 transformer switch box. The wiring
is the same as for a standard resistance
test plus a connection of the
V1 input to the
switch box. Via the switch box, the
CPC 100 injects a constant current from the
6A DC output into the power transformer.
The current is led through the I AC / DC
input for measurement.
Follow the steps below to fill in the Demag test card:
► Enter the vector group of the transformer.
► Specify whether the test object is a single-phase transformer.
► Enter the test current.
In the first step during the demagnetization process, the transformer core is saturated. This
process stops at predefined thresholds. If a threshold is not reached over a long period of time,
the saturation level can be adapted manually. By pressing the
Set current saturat. soft key,
the present saturation level can be set as the new threshold. During the Demag cycle, the
initial remanence is measured and the currently remaining remanence is constantly displayed.
After the test, the core is demagnetized.
DANGER
Never touch or unplug the
cables before the automatic
Demag cycle is completed.
If in doubt, use a grounding or
discharging rod.
CP SB1 transformer switch box
Check box for
single-phase
transformers
Test current
Measured current
Set present
saturation as the
new saturation
threshold level
Current
saturation level or
remaining
remanence
Demag status
message
Vector group of
the transformer
Saturation
threshold
Demag status messages:
Wiring check... Checking for correct wiring
Idle. Displayed before the process is started
Test was canceled. Displayed after pushing the Emergency Stop button or
confirming an error message
Saturating core... Core is being saturated
Discharging... Core is being discharged
Demagnetizing... Actual demagnetization cycle in progress
Core is demagnetized. Demag cycle has been successful
Test card during Demag process
Demagnetization