You switch on the air conditioner.
The lights dim.
The compressor starts.
A sensitive piece of equipment suddenly resets.
Is it just a coincidence?
Maybe.
But repeated electrical disturbances can be worth investigating.
1. Voltage fluctuations
Electrical loads don't all behave the same way.
Large or changing loads can affect voltage conditions within an electrical installation.
If fluctuations are frequent, measuring the electrical system can help determine what is actually happening rather than relying on assumptions.
2. Large equipment starting
Motors, compressors and other equipment can create changing electrical demand when they start.
This can sometimes be noticeable as a brief change in lighting or equipment behaviour.
3. Poor connections
Loose, damaged or deteriorated electrical connections can create safety and performance issues.
These should be investigated by appropriately qualified electrical professionals.
4. Unbalanced loads
In three-phase systems, how loads are distributed between phases matters.
Poor load distribution can contribute to undesirable operating conditions.
5. Power-quality disturbances
Power quality isn't only about voltage.
Depending on the installation, an assessment may consider characteristics such as:
Voltage variations
Frequency
Harmonics
Transients
Phase balance
Power factor
6. New equipment interacting with an existing system
This is becoming particularly relevant as properties add more electronic equipment.
Solar inverters, batteries, EV chargers and other consumer energy resources increasingly interact with the electrical network.
Australia's new consumer-energy-resource framework is specifically focused on ensuring technologies can connect and operate effectively with the electricity system.
Don't diagnose from one symptom
A flickering light doesn't automatically mean one specific fault.
The same symptom can have different causes.
That's why an engineering assessment may involve:
Observation - Measurement - Analysis - Diagnosis - Recommendation
Instead of:
Guess - Replace equipment - Hope it works
When should you investigate?
Consider professional assessment if you are experiencing:
Repeated flickering
Equipment resets
Unexpected shutdowns
Voltage concerns
Problems after adding large electrical loads
Power-quality complaints in a commercial facility
Sometimes the most useful first step isn't replacing equipment.
It's measuring what the electrical system is actually doing.
The lights dim.
The compressor starts.
A sensitive piece of equipment suddenly resets.
Is it just a coincidence?
Maybe.
But repeated electrical disturbances can be worth investigating.
1. Voltage fluctuations
Electrical loads don't all behave the same way.
Large or changing loads can affect voltage conditions within an electrical installation.
If fluctuations are frequent, measuring the electrical system can help determine what is actually happening rather than relying on assumptions.
2. Large equipment starting
Motors, compressors and other equipment can create changing electrical demand when they start.
This can sometimes be noticeable as a brief change in lighting or equipment behaviour.
3. Poor connections
Loose, damaged or deteriorated electrical connections can create safety and performance issues.
These should be investigated by appropriately qualified electrical professionals.
4. Unbalanced loads
In three-phase systems, how loads are distributed between phases matters.
Poor load distribution can contribute to undesirable operating conditions.
5. Power-quality disturbances
Power quality isn't only about voltage.
Depending on the installation, an assessment may consider characteristics such as:
Voltage variations
Frequency
Harmonics
Transients
Phase balance
Power factor
6. New equipment interacting with an existing system
This is becoming particularly relevant as properties add more electronic equipment.
Solar inverters, batteries, EV chargers and other consumer energy resources increasingly interact with the electrical network.
Australia's new consumer-energy-resource framework is specifically focused on ensuring technologies can connect and operate effectively with the electricity system.
Don't diagnose from one symptom
A flickering light doesn't automatically mean one specific fault.
The same symptom can have different causes.
That's why an engineering assessment may involve:
Observation - Measurement - Analysis - Diagnosis - Recommendation
Instead of:
Guess - Replace equipment - Hope it works
When should you investigate?
Consider professional assessment if you are experiencing:
Repeated flickering
Equipment resets
Unexpected shutdowns
Voltage concerns
Problems after adding large electrical loads
Power-quality complaints in a commercial facility
Sometimes the most useful first step isn't replacing equipment.
It's measuring what the electrical system is actually doing.