Besantek BST-GFL31, User Manual

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BST-GFL31 User Manual
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of red testing lead with the arrow mark (label on the clamp) pointing towards the direction of faulty
point as Fig 2.5.2.7. Keep the current detector stable for around 5 seconds and then click the button
Set Ref in the screen of signal receiver.
Fig 2.5.2.7 Correct connection Fig 2.5.2.8 Incorrect connection
After reference setting, signal strength of reference will be set as 100%, phase angle becomes 0° and
current direction will be positive (Green like ).
Below are the examples before and after reference setting. “Ref I” is the current value at the reference
point. Before setting reference, this value is always defaulted as 1.000mA.
Fig 2.5.2.6 Before setting Fig 2.5.2.7 After setting
Red columns in middle of the screen indicate strength of signal in percentage. It will increase one
column when signal increases by 10%.
NOTE:
1)
Only use ONE current clamp for reference setting. Do not use two clamps.
2)
Before setting, make sure to set signal as “Continue“ in signal generator (Fig 2.5).
3)
Although you could set the reference for many times, please make sure to clamp in the
circuit that has current flow (before the point of fault) and with arrow pointing towards
earth fault.
4)
If reference setting is done when there is no current flow at all, signal display in
receiver after the reference setting will be a misleading to you.
5)
When there is fault on negative busbar, wire connection is like Fig 2.5.2.6. And in
reference setting, the current clamp should be connected with black testing lead in the
same way like Fig 2.5.2.7 (arrow mark towards the faulty point).
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