In an installation, current and voltage harmonics can be present due to
- self generated current harmonics and/or
- conveyed from other installations in the form of voltage harmonics.
The former is due to the presence of non-linear loads at one’s premises whilst the latter is due to non-linear loads at neighbouring premises.
Non-linear loads are present everywhere ranging from offices to large factories. Typical examples of non-linear loads in offices are Notebooks and PCs, UPS, and LED lighting whilst variable speed drives, inverters, welding and air conditioning are examples of non-linear loads in industry.
The consequence of harmonics in an electrical installation can be summarised by the following non-exhaustive list of power quality issues:
- Overload of equipment such as cables and transformers
- False tripping of circuit breakers
- Damage to power factor correction equipment
- Reduction of motors’ lifetime due torque pulsations
- Affect Sensitive processes due to measurement errors
- Light Flicker
We offer our clients a full survey using state of the art equipment that can capture up to the 50th harmonic using IEC 61000-4-30 class A instruments. Moreover, our engineers will provide a detailed report of the analysis carried out and outline recommendations to address any identified problems.
If you need more information do not hesitate to contact us.