Grounding, AC Mitigation, and CP Studies

We also excel in Project work for AC Mitigation, Cathodic Protection, and Grounding studies for Pembina, CNRL, Kinder Morgan, ATCO, and Altalink to name a few. Please contact our Northern Grounding division for more information.

AC power is not typically found on pipelines. If an AC voltage is present on a pipeline, it has come from one of three effects: inductive, capacitive or conductive coupling.

AC currents flowing through power line conductors cause alternating magnetic fields to be set up around the conductors. These magnetic fields in turn induce opposing AC voltages in any metallic object that is within the influence of the power line.

Pipe walls can be affected by AC interference through AC corrosion, external coating damage and pipe wall damage.

AC mitigation for pipelines can be designed, installed, and maintained to minimize the induced voltage on the system. This can be accomplished by installation of grounding techniques, such as grounding rods attached to the pipeline.

Cathodic Protection is an electrochemical means of corrosion control in which the oxidation reaction in a galvanic cell is concentrated at the anode and suppresses corrosion of the cathode in the same cell. The steel pipeline or structure, is cathodically protected by its connection to a sacrificial magnesium anode buried in the same soil electrolyte.

For larger facilities such as storage tanks or pipelines, even application of cathodic protection current becomes an issue. Northern Grounding uses specialized design tools to assess the spread of current on tank bottoms, pipelines and complex interconnected piping systems.

A grounding analysis will determine if your equipment has proper ground fault protection installed and operating. Grounding is critical for the protection of electrical equipment and the safety of workers.

Grounding keeps devices safe from surges, lightning, and faults. Some equipment also requires grounding as an essential component for operation, as it serves as a reference point for various measures.

The grounding studies will detect any installation or calibration errors in your grounding system. These include things such as problems in tripping tolerance (too sensitive or too insensitive), polarity issues, and neutral connections to ground.

Photo of Arc Flash stickerArc Flash, Breaker Co-ordination and Short Circuit Analysis studies will allow us to calculate approach boundaries and incident energy levels, reduce severity and improve clearing time of faults and identify the worst-case electrical currents. This hazard assessment will allow us to recommend PPE and safest work practices and produce Equipment labels to identify the Arc Flash hazard to the workforce.

A component of the hazard assessment is identifying both the severity and potential of arc flash events in the workplace. The standard for electrical safety in the workplace is CSA Z462, this standard requires owners to develop safe work procedures around their electrical equipment. Our arc flash studies are performed to IEEE Standard 1584.