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G Mesure de trois phases (courant triphasé)
Pour le raccordement, tenez compte des illustrations suivantes :
1. Lors de la mesure de conducteurs montés en delta, la puissance
totale est calculée comme suit :
W total = W1 + W2
W1 est le produit du courant de la phase L1 et de la tension régis-
sant entre le conducteur L1 (pince de mesure rouge) et L2 (pince
de mesure noire).
W2 est le produit du courant de la phase L3 et de la tension entre
L2 (pince de mesure) et L3 (pince de mesure rouge).
2. Lors de mesure de quatre conducteurs montés en étoile, la puis-
sance totale est calculée comme suit :
W total = W1 + W2 + W3
W1 est le produit du courant de la phase L1 et de la tension entre
L1 (pince de mesure rouge) et N (pince de mesure noire).
W2 est le produit du courant de la phase L2 (pince de mesure
rouge) et N (pince de mesure noire).
W3 est le produit du courant de la phase L3 et de la tension entre
L3 (pince de mesure rouge) et N (pince de mesure noire).
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- Currents >1000 Apeak AC current may damage the power clamp.
It must be observed that during each measurement only one (1)
isolated conductor (max. diameter 52 mm) is braced. Measuring a
multiwire cable is not possible (single-phase).
If, however, two or more isolated conductors (total diameter of
max 52 mm) of a polyphase system are braced, the display read-
ing is equivalent to the vector sum of the individual currents.
- Do not use the device in rooms or under unfavourable ambient
conditions where combustible gases or fumes are present or are
likely to be present. For your own safety avoid that the measuring
device or the test leads become damp or wet. Do not operate the
device in the direct vicinity of
a) strong magnetic fields (speaker, magnets)
b) electromagnetic fields (transformers, engines, coils, relays,
contactors, electromagnets etc.)
c) electrostatic fields (charge/discharge)
d) transmission antennas or HF generators
- Do not use the tester shortly before, during or immediately after
a thunderstorm (lightning stroke! / energy-loaded overvoltage!).
Make sure that your hands, shoes, clothes. the floor, measuring
device and test leads, circuits and circuit parts are dry.
- If there is reason to believe that safe operation is no longer possi-
ble, the device is to be put out of operation and secured against
unintended operation.
Safe operation is no longer possible if:
- the device shows visible damages,
- the device no longer works and
- the device was stored under unfavourable conditions for a long
period of time,
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