The Electrical Power Research Institute has stated that 90% of electrical problems in industry relate to voltage. The majority of this is due to customer load, with only 30% of problems passed from the utility supplier. An IBM study attributes the majority of these to under-voltage events.
There are three symptoms of voltage instability:
‘Over’-voltage conditions, characterised for example by lights burning too quickly.
‘Under’-voltage conditions, in which the supply compensates by increased current, meaning that equipment runs hotter, wasting energy.
3-phase imbalance directly relates to KW loss:
Under Voltage, over voltage and voltage imbalance have adverse effects: -
* Based on NEMA (National Electrical
Manufacturers Association) Statistics
- Overheating of motors
- Imbalanced currents
- Negative voltage sequence
- Motor bearings failure
- Speed variation in motors
- Reduced production quality
- Reduced motor efficiency
- Wasted energy which leads to higher electric bills
- More difficult to provide adequate overload protection
- Increased noise and vibration
- Increased maintenance of equipment and machinery
Used to address voltage issues UPS, SPS, and voltage stabilisers:
X Waste energy X Connect in series X Generate harmonics X Have limited fixed sizes X Are bulky and expensive
ElectroFlow™:
Provides Real time voltage improvement and stability
Saves energy (KW, KVA, KWH)
Connects in parallel and is fail-safe
Is modular and expandable
