Sentridge provides a comprehensive harmonic survey service.
Harmonic Site Surveys – The Process
To correctly ascertain your requirements a site survey to establish the present levels of Harmonic distortion needs to be carried out.
This is how it works:
Assessment of your site conditions
To conduct a Harmonic survey it is necessary to establish the present site conditions. This is to include investigation of the supply transformers, establishment of the Point of Common Coupling (PCC), assessment of the single line distribution including pertinent ancillary equipment such as power factor equipment on site and the method of connection on the monitoring equipment.
Monitoring Equipment Connection
We go to site and connect the Monitoring Equipment, this is hooked up for one week to record site conditions. This gives us the data to produce a comprehensive report.
Harmonic Report
This detailed report will include all information required under G5/4. Our proprietary software will be used to interpret current site results and predicted harmonic levels and confirm compliance with current legislation.
Why carry out a Harmonic Survey?
High harmonic currents and high harmonic voltage distortion can be the cause of the following problems, often causing disruption to your business:
- Overheating of conductors
- Insulation failure
- Nuisance tripping of circuit breakers
- Nuisance rupturing of fuses
- Additional significant voltage distortion of networks run from generators
- Overheating and possible resonance on networks using capacitors
- Overloaded neutral
- Neutral earth potential (generally due to single phase harmonic loads)
- PC/TV monitor stroboscopic effects
- Malfunction of microprocessor based equipment
- Causes linear devices to draw non linear current (ie- motors)
- Torque pulsations in motors
- Flicker in lighting
- Capacitor dielectric failure
- Insulation breakdown
- PC/TV monitor and power supply failure
- Electronic lighting failure