• Customer Comments
• Articles
• Voltage and Current Diagnostics
• Ultrasonic Testing
• Infrared Thermography
• Energised Testing and Inspection
• De-energised Testing and Inspection
• Electrical Systems Analysis
• Predictive and Proactive Service
• Priority Emergency Response

Measurements Taken

• Voltage
• Current
• Currentt Distortion: THDc
• Voltage Distortion: THDv
• Harmonic Distortion
• Earth Loop Impedance
• Short Circuit Capacity Readings

What Are We Looking For?

• Voltage /Current Imbalance
• Total Harmonic Distorted Voltage and current
• Neutral and Earth voltage and currents

"Harmonics are generated when a load draws a non-linear current from a sinusoidal supply.“

"In reality, the resultant neutral conductor current can be well above the current-carrying capacity for the cable.“

"This can be extremely dangerous as neutral conductors, which are not fuse or MCB protected, and can overheat."

IEE Wiring Matters; Summer, 2006; Periodic Inspection of Critical Systems.

Available as a download…

Call us now for your FREE System Evaluation to see if you can reduce your kilowat hour utiliy charges.

Voltage & Current Diagnostics & Testing for Harmonic Distortion…

Harmonic Distortion indicates the ability of your distribution system to adequately carry non-linear loads.

• Caused by inability of system to maintain potential to non-linear loads.
• Propagates throughout the distribution system.
• Dampened and blocked by in-series Inductive Devices (reactors, transformers)
• Capacitors in the system become a low-impedance path to earth or other phases.
• Constructive and destructive interference with other sources of voltage distortion in the entire system.
• “Dirty Power” – poor wave shape and zero-crossing. Logic and timing faults.

By reducing the level of Total Harmonic Distortion (THD) within your facility, you will not only contribute to better performance of your equipment but significantly reduce the levels of heat within the system, reducing electric utility costs and prolonging the life of your equipment at component level, keeping repairs or replacement to a minimum.

EXAMPLES OF NON-LINEAR LOADS:

Variable Speed Drives, DC Power Supplies, HF Electronic Lighting Ballasts, Compact Florescent Lamps, Computer Power Supplies,

EXAMPLES OF POWER QUALITY PROBLEMS:

• Nuisance tripping
• Circuit board failure or data loss
• Inability to retransfer back to utility power
• Overheating Delta-Star transformers
• Failing motor contactors
• Heat accumulation on conductors

THE ENERGISED MILLIVOLT DROP TEST

An Energised Millivolt Drop test to measure the drop in Voltage across each individual contact will tell us the exact condition of the contacts surfaces.

During this unique test we will also measure the current. The Voltage drop is then compared with similar components using International Electrical Testing Association standards.

Millivolt drop testing does not require the traditional shutdown of equipment as required using traditional testing methods.

This is very important in systems that cannot be shut down for Maintenance, in systems where faults have occurred, and in systems where electrical installation quality needs to be verified.

Using this method, contact resistance can also be compared over time to look for signs of breakdown and trending.