Electrical equipment can show warning signs long before a major failure occurs. A cable may develop a localized fault, transformer oil may indicate deterioration, or testing may reveal an issue that is not obvious during a visual inspection. The challenge is knowing what those findings mean and what should happen next.

For facilities in Toledo, OH, North Central Electric provides electrical testing, diagnostics, maintenance, commissioning, and technical services that help customers understand the condition of their equipment. NCE works with power generation, utility, industrial, manufacturing, and commercial customers and provides testing programs designed around equipment condition, safety, and maintenance needs.

What Can Electrical Testing Tell You About Equipment?

Electrical testing provides information that a basic visual inspection cannot always reveal. NCE uses specialized testing and diagnostic methods to evaluate equipment, identify faults, and provide information that can support maintenance decisions.

High voltage cable testing, for example, can be used to identify local faults and evaluate cable systems using standards such as AEIC, ICEA, IEC, and IEEE. NCE offers several diagnostic methods, including VLF Hipot testing, AC Resonant Hipot, DC Hipot testing, partial discharge analysis, Tan Delta analysis, TDR, and fault locating.

This type of information can be useful when a facility needs to understand the current condition of a cable system or determine what type of maintenance may be appropriate.

Looking Beyond a Single Electrical Component

Testing does not always focus on one piece of equipment. Different services can provide different pieces of information about the overall condition of a facility’s electrical assets.

NCE’s predictive and preventive maintenance programs can include infrared and thermal scanning, in service load readings, offline electrical testing, oil and DGA samples, online partial discharge analysis, revenue meter calibration, and visual inspections. These programs can be customized around customer needs.

For transformers, oil diagnostics can provide information about the transformer and its insulating fluid. NCE also provides transformer assembly, installation, vacuum fill, oil circulation, electrical testing, oil processing, and related repair and maintenance services.

Electrical Services Available Through NCE

NCE’s capabilities cover testing, diagnostics, maintenance, engineering, and equipment related services.

  • Acceptance Testing and Commissioning – Evaluates newly installed or existing electrical equipment to help confirm that systems are installed properly, operate as intended, and meet applicable standards. NCE provides both Green Field testing for new substations and Brown Field testing for existing, in service substations.
  • Electrical Design and Power System Studies – Supports electrical projects through services such as load flow studies, short circuit studies, coordination studies, arc flash hazard analysis, protective relay settings, protection and control design, SCADA and communication systems, and power quality and harmonic analysis.
  • High Voltage Cable Testing and Diagnostics – Uses specialized testing methods to evaluate high voltage cable systems, identify faults, and gather condition information for new and in service cables.
  • Predictive and Preventive Maintenance – Combines testing and inspection methods such as thermal scanning, partial discharge analysis, oil and DGA sampling, offline testing, and visual inspection to support ongoing equipment maintenance.
  • SF6 Gas Handling – Provides SF6 gas filling, reclamation, disposal, and analysis, including work involving circuit breakers and GIS equipment. NCE technicians are trained in current handling practices and regulations.
  • Transformer Assembly and Oil Processing – Provides transformer offloading, assembly, installation, vacuum and oil processing, final acceptance testing, oil diagnostics, maintenance, and related services.

When Should a Facility Consider Electrical Testing?

Electrical testing can be useful at different points in the life of an electrical system.

Testing may be appropriate when new equipment is being installed, when an existing system needs condition information, when a suspected fault needs to be investigated, or when a facility is establishing a recurring maintenance program.

NCE works with customers to schedule regular maintenance and testing programs and provides reports describing the present condition of equipment, recommended corrective action, and supporting documentation.

The value of testing is not limited to finding a problem. Reliable condition information can also help a facility determine what requires attention now and what should be monitored as part of future maintenance.

Why Testing and Diagnostics Matter for Electrical Maintenance

Electrical failures can lead to downtime, repair costs, and safety concerns. NCE’s maintenance programs are designed to help predict equipment failures before they occur, while its testing and diagnostic services provide information about the condition and operation of specific electrical assets.

For facilities managing high voltage cables, transformers, substations, switchgear, and other electrical equipment, having documented testing results can also make it easier to track equipment condition over time and plan corrective action.

Frequently Asked Questions

What does high voltage cable testing identify?

High voltage cable testing can help identify local faults and provide information about the condition and performance of cable systems. NCE uses testing methods including VLF Hipot, AC Resonant Hipot, DC Hipot, partial discharge analysis, Tan Delta analysis, TDR, and fault locating.

What is included in a predictive maintenance program?

NCE’s predictive and preventive maintenance services can include infrared and thermal scanning, in service load readings, lockout and tagout procedures, offline electrical testing, oil and DGA samples, online partial discharge analysis, revenue meter calibration, visual inspections, and backup generator services. Programs can be customized to customer needs.

Does NCE provide transformer testing and oil services?

Yes. NCE provides transformer assembly and installation, electrical testing, vacuum fill, oil circulation, oil processing, oil diagnostics and analysis, degasification, dehydration, LTC inspection and maintenance, bushing replacement, and other transformer services.

What types of electrical studies does NCE perform?

NCE provides load flow studies, short circuit studies, coordination studies, arc flash hazard analysis and mitigation, protective relay setting creation, protection and control design, power quality and harmonic analysis, SCADA and communication systems, and other engineering services.

Can NCE test equipment that is already in service?

Yes. NCE performs testing and diagnostic services for existing equipment, including Brown Field acceptance testing for existing, in service substations and diagnostic testing for in service high voltage cables.

Discuss Your Toledo Electrical Testing Needs With NCE

If you need electrical testing, diagnostics, maintenance, commissioning, or equipment services for a facility in Toledo, OH, NCE can help identify the appropriate service based on your equipment and project requirements.

Contact North Central Electric to discuss your testing or maintenance needs and determine the next step for your electrical equipment.