Voltage quality describes the time dependent voltage characteristics in the three-phase current system (power system frequency, height, unbalances etc.) We understand the securing of voltage quality as a vital part of the consumer’s security of supply.
In accordance with EN 50160 we distinguish the following characteristics of voltage fluctuations:
- Dips
- Interruptions
- Voltage peaks
- Transient overvoltages
- Intermediary harmonic voltages
- Commutation dips
- Voltage fluctuations
- Frequency deviations
- Current displacement
As far as the consumer is concerned, these characteristics lead to expensive losses in the network and interruptions in the network, i.e. a lower degree of security in supply.
In contrast to this, optimum voltage quality results in:
- Reduction in network losses, in particular those caused by harmonics and load fluctuations
- More stable and fault-free operation of systems and networks
- Longer service life of equipment
- Faster amortisation of compensation systems
- Avoidance of investments in transformers, cables and other transmission facilities