Chauvin Arnoux C.A 6121, User Manual

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33
i
R
0
i
C
-jIm
Re
i
A
i .....absolute value of current
A
i = i + i
A C R
i .....capacitive current
C
i .....resistive current
R
Fig. 3. Test current diagram
How to perform the measurement ?
1. Set the rotary switch to the HV (high voltage) position; the following screen is displayed :
1mn 00s
_ _ _ _ mA
Timer I Un
U:_ _ _ _ kV
HV
1000V 1mA
Function name
Nominal test voltage
Tripping out current
Test voltage
Set timer value
Timer key to set timer
value or to switch it on/off
I key to select tripping out
current or to select character
of displayed leakage current
Leakage current
(main result)
Un key to select
nominal test voltage
Fig.4. Basic screen in HV position
2. Select the test parameters as follows :
■
Character of the displayed test current (fig. 5)
- Press
I key and keep it pressed (approx. 2 s) until the menu for selection of
current character is displayed.
- Press
ñ ñ ñ ñ ñ
to select resistive part (the symbol is displayed above the
mA unit), capacitive part (the symbol is displayed above the mA unit),
or absolute value (nothing is displayed above the mA unit).
- Press EXIT key to exit this menu
■
Tripping out current (fig. 6)
- Press
I key to open the tripping out current selection menu.
- Press the
ñ ñ ñ ñ ñ
or
ò ò ò ò ò
keys to choose the tripping current.
- Press
EXIT
key to exit this menu
■
Test voltage
- Press the
U
N
key to choose the test voltage between 1 kV, 1.25 kV or 1.5 kV.
■
Timer ON/ OFF
- Press the
TIMER key to validate the timer (the chosen test time is displayed)
or not validate the timer (the test time is not displayed).
■
Duration of the test (fig. 7)
- Press the
TIMER key and keep it pressed (approx. 2 s) until the menu for
selection of the timer value is displayed.
- Press the
ñ ñ ñ ñ ñ
or
ò ò ò ò ò
keys to select the duration of the test.
- Press EXIT key to exit this menu
NOTES : The value of the test current threshold that has been defined is always
compared to the absolute value of the test current, whatever the chosen
character displayed: resistive (real) or capacitive (imaginary).
1mn 00s
_ _ _ _ mA
Exit
Set Character
U:_ _ _ _ kV
HV 1000V 1mA
Fig.5. Menu for selection of test
current character
1mn 00s
_ _ _ _ mA
Exit
Set Imax
U:_ _ _ _ kV
HV 1000V 1mA
Fig.6. Menu for selection of tripping
out current
1mn 00s
_ _ _ _ mA
Exit
Set Timer
U:_ _ _ _ kV
HV 1000V 1mA
Fig.7. Timer value selection menu