Analyser Chauvin Arnoux CA8335: 2. Measuring harmonics

 

1. Powering of analyser.

Turn on analyser:

 

 

2. Connecting of voltage and current leads.

It‘s time to connect voltage and current leads to analyser.

Press „Setting“ button:

 

By using „up“, „down“ buttons select option “Sensors and rations”:

 

Press yellow button below letter „A“ as marked in picture:

 

At this moment current leads (clamps) are not connected yet:

 

Every current clamp has own color marking: phase A (or L1) – yellow, phase B (or L2) – green, phase C (or L3) – red. Neutral current clamp is marked as blue.

 

Phase A current clamp:

 

Analyser has recognised phase A current clamp after connecting clamp to analyser’s socket:

 

 

Connect other current clamps to analyser:

 

Connect voltage A, B, C leads to analyzer:

 

3. Setting of measurement scheme.

Press „Setting“ button:

 

By using „up“, „down“ buttons select option “ Electrical connection ” scheme as shown in picture:

 

By using „up“, „down“ buttons select electrical connection scheme as shown in picture:

 

Press button „Enter“:

 

4. Setting of measurement method. Here you can select measurement method with harmonics.

By using „up“, „down“ buttons select option “Calculation methods ” as shown in picture:

 

Press button  “Enter”.

 

5. Date and time setting.

 

We need to set date and time:

Press button „Settings.

By using „up“, „down“ buttons select „Date/Time“.

Press button „Enter“.

Set correct date and time.

Press button „Enter“.

 

6. Connecting scheme of analyser.

This scheme is shown in picture:

You should pay atention that direction of current clamp should be the same as flowing current direction in phase.

If these directions will be oposite, measurements of currents will be not correct (current will be shifted by180°).

Connected current clamps:

 

Connected voltage clamps:

 

6. Measuring harmonics.

Press button as shown in picture:

 

Press yellow button below letter A.

Current harmonics:

Press yellow button below letter V.

Voltage harmonics:

 

Current and voltage harmonics opened with analyser’s software:

 

 

Press button as shown in picture:

 

Here we can analyse waveforms of voltages and currents:

 

 

Waveforms of voltages:

 

 

We can  download received waveforms to PC.

You can make picture of this waveform.

Press button „Snapshot“ and hold it pressed for several seconds:

 

On upper left corner will apear „camera“ picture:

 

Photo is made.

Opening photo of waveform.

Press button „Snapshot“:

In window „Snapshot list“ select photo and open it:

 

 

Opening waveforms by PC.

„Power analyzer“ software is used to open recorded waveforms.

Install „Power analyzer“ software and run it.

Press button „Connect“:

 

Set connection parameters:

 

Window „Instrument“:

 

Select “Photographs” option and open selected record:

 

Current waveforms:

 

Current harmonics:

 

Voltage waveforms:

 

Voltage harmonics:

Voltage (black) and current (yellow) waveforms of phase L1:

Voltage (red) and current (green) waveforms of phase L2:

Voltage (blue) and current (red) waveforms of phase L3:

As you can see in this article measured current harmonics are huge. Voltage harmonics are small. In most cases in power network exist only current harmonics.