The ripple control monitoring feature has proven to be popular and useful on the A.Eberle PQ-Box 100 Power Quality Analyser. A very cost effective tool – for the purposes of ripple control signal monitoring at customer premises is now available in the form of a Single Phase “Basic” version of the PQ-Box 100.
Simply adding a CT to the unit, allows load current/power to also be measured – useful when you want to record the effect of the ripple control operation to find out how much load was dropped immediately as a result of the ripple control (at your feeder, or customer premises).
A single phase voltage input, “Basic”, PQ-Box 100 is available or with the high speed ‘Ripple Control Option’. These portable Analysers can be field upgraded – right up to full “Expert” PQ monitoring capability any time in the future.
Ripple control information is available for display/analysis in (up to) four different modes. The two most useful are:
- PQ-Box 100 ‘Basic’ ‘Permanent Recording’ Information
Voltage data logging is provided with sufficient memory to capture days of data [or months when using the recommended 10 minute averaging period]. The averaging period can be set from (1 second to 30 minutes).
This Permanent recording mode allows the ripple control voltage (as a percentage of nominal) to be displayed in a graph versus time.
Figure 1. Example ‘Permanent Recorded’ data - ripple signal voltage vs time (1 second to days)
2. PQ-Box 100 ‘High Speed’ ripple control pulse capture option
A high speed recorder is triggered by the set ripple frequency/threshold being exceeded, capturing the ripple pulse encoding (voltage vs time).
Figure 2. Example high speed ripple control signal data (10 ms resolution)
If you are interested in seeing the PQ-Box 100 ripple control monitoring features first hand, contact us for a demo. Detailed information on the operation of the different ripple control features of the PQ-Box 100 can be found in HV Powers “PQ-Box 100 Hints and Tips #4” document – available from our website Technical Library.
In addition to the ripple control monitoring functions, there are a host of other useful voltage/power measurements that are made available within these suggested PQ-Box 100 configurations and the freely supplied WinPQ mobil software.