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14. OPTIONS/ADD-ONS
Full-electronic HV-Tester F1-1x Typs
14.2
Voltage
Readback unit
E04
The readback unit option E04 serves for controlling if the high voltage is
supplying the test item. By this it is guaranteed that the test item is safely
bonded and supplied to the correct voltage. In addition to the two HV-energy
lines, two sense lines have to be connected to the connecting terminals
(four wire measuring).
At devices with display, the parameter Umin itself can be switched on and
turned off in the menu, as well as adjusted in the range between 70 and
98% of the test voltage as voltage value in x.xx kV. At automatic devices,
this is managed by software order (see manual "remote control - com-
mand #SU1(...)").
If the predefined value of Umin is fallen below during an examination, then
the device breaks off with the fault „Umin underrun“. At automatic devices,
becomes at interrogation of the equipment status the fault transmitted -
Code Z column 03.
Attention High Voltage !! Do not touch !!:
The two cables of the reedback unit must always be connected tightly.
During an active examination (on switched HV) and HV energy lines not
connected the ends of the sense lines are applied to voltage/high voltage.
Attention High Voltage !
The sense leads are under HV potential during the high voltage test. Do
not de-connect during the test run.
The intrinsic resistance of the reedback unit is > 300 MOhm. The current
which flows through the body of a person touching the lines is not danger-
ous, however, can be painful under circumstances.
Technical data feedback unit
Measurement range:
100V – 7000 V DC / 100 – 5000 V AC
Genauigkeit:
1.5% of 5 digit at AC
1% of r 2 Digit at DC
This precision applies to not crossed sense lines.
Intrinsic resistance:
>300 MOhm
Detection of not attached sense leads or HV lines.
Note: Assigning sense lines correctly
For sense operation (Umin active) it is necessary to take notice that the
sense terminal X4 is connected together with HV-terminal X2 and sense
terminal X5 with HV-terminal X3. The given precision refers to not crossed
sense operation.
