LEM MachineTest 204 Manuel D'utilisation page 21

MEASUREMENTS
Total capacitance C
(parallel connection of all capacitors)
To avoid tripping out test voltage, tripping current at the instrument
shall be set to the closest value above estimated test current.
STEP 2 Prepare the instrument
Place it into such position that both test points of tested object will be
-
reachable by the test tips (take into account the 2 m long test leads) or
use optional test lead extensions.
Connect the instrument to mains voltage via mains cord.
-
Connect test leads to test terminals of the instrument.
-
Set rotary switch to HV position.
-
Switch on the instrument, initial display state is present (- - -).
-
STEP 3 Carry out the test
Press the START/STOP key to start the measurement
-
- Contact one test prod to PE terminal
Contact with the second test prod the shorted live terminals and wait for
-
at least 1s (see figure below)
Remove test prods
-
- Press the START/STOP key again to stop the measurement.
Write down the test result (OK or breakdown).
-
Fig. 18. Connection of test leads
(nF)
4.7
10
27
47
68
100
220
330
470
680
Capacitive current Ic
(at test voltage of 1100 V / 50 Hz)
20
(mA)
1.6
3.5
9.3
16.2
23.5
35
76
114
162
235