
Fluke 434/435
Users Manual
Available function keys:
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| Selection of signals to be displayed: V displays all voltages, |
| F1 |
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| A displays all currents. A (L1), B (L2), C (L3), N (neutral) |
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| give simultaneous display of phase voltage and current. |
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F3
F4
Return to Meter screen.
Access to trend screen.
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| Switch between HOLD and RUN of screen update. |
| F5 |
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| Switching from HOLD to RUN invokes a menu to select |
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| immediate (NOW) or TIMED start time which allows you |
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| to define start and duration of the measurement. |
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Tips and Hints
The voltages and currents in the Meter screen can e.g. be used to check if power applied to a
Each phase voltage or current can be
The positive sequence component is the normal component such as present in balanced 3- phase systems. The negative sequence component results from unbalanced
Zero sequence components may appear in an unbalanced load in 4 wire power systems and represent the current in the N (Neutral) wire. Unbalance exceeding 2 % is considered as too high.
Additional to unbalance percentages (%, relative reading), you can select absolute readings. This type of readings is of use for measurements in power distribution systems where negative sequence protection relays with adjustable tripping characteristics are used. These relays are used to protect three phase generators. In this case it is practical to measure the absolute value of the negative sequence current component (Aneg).