Electrical Maintenance Services

Ambrose Power Field Services provides scheduled and preventive maintenance for electrical infrastructure. NETA-certified technicians perform maintenance testing, inspections, and diagnostics on the systems that keep facilities running. This is about keeping existing systems running. Distinct from Testing and Commissioning, which focuses on new construction acceptance testing.

Preventive Maintenance Programs

Scheduled annual and semi-annual maintenance for electrical infrastructure. Transformer oil sampling on a regular cadence. Circuit breaker maintenance per manufacturer recommendations and NETA MTS intervals. Relay maintenance testing to verify protection systems operate correctly. These are not one-time events. They are ongoing programs designed to catch problems before they cause outages.

We work with facility owners and operators to build maintenance schedules that fit their operational requirements. Planned outages, rotating shutdowns, or maintenance during low-demand periods. The goal is to maintain the system without disrupting operations.

Electrician performing panel maintenance

Transformer Maintenance

Oil sampling and dissolved gas analysis (DGA) to detect developing faults. Insulation power factor testing. Winding resistance measurements. Turns ratio testing. Load tap changer inspection and maintenance. These tests reveal the condition of the transformer before a failure occurs.

Trending DGA results over time is one of the most effective ways to manage transformer health. A single sample tells you where you are. A trend tells you where you are headed. We provide the testing data and reports that make informed maintenance decisions possible.

Dual oil-filled power transformers with cooling fans

Protective Relay and Circuit Breaker Maintenance

Relay maintenance testing per NETA MTS intervals. Functional testing, calibration verification, and trip testing to confirm protection systems respond correctly. Modern microprocessor relays and legacy electromechanical relays both require periodic testing.

Circuit breaker timing tests, contact resistance measurements, insulation resistance testing, and functional operation verification. Breakers that sit closed for years still need to open when called upon. Maintenance testing confirms they will.

Technician with relay test set at control panel

Condition Assessment and Diagnostics

Infrared thermography surveys to identify hot spots and loose connections. Cable testing programs using hipot, VLF, and tan delta to assess cable insulation condition. Power quality monitoring to identify harmonics, voltage sags, and other issues. These diagnostic tools find problems before they cause equipment damage or outages.

Condition-based maintenance replaces guesswork with data. Test results and diagnostic findings drive maintenance decisions. Replace equipment that shows degradation. Defer maintenance on equipment that tests clean. Spend maintenance dollars where they matter.

Infrared thermography heat map of electrical equipment

Standards and Compliance

NETA MTS - Maintenance Testing Specifications
NFPA 70B - Recommended Practice for Electrical Equipment Maintenance
NFPA 70E - Electrical Safety in the Workplace
IEEE Standards for Power Apparatus Testing
OSHA 1926 Subpart V and Subpart K

Maintenance Capabilities

Scheduled preventive maintenance programs
Transformer oil sampling and dissolved gas analysis
Infrared thermography surveys
Protective relay maintenance testing per NETA MTS
Circuit breaker maintenance and testing
Cable testing programs (hipot, VLF, tan delta)
Switchgear inspection and maintenance
Ground resistance testing
Battery system testing and maintenance
Motor testing and analysis
Power quality monitoring and analysis
Arc flash study field data collection

Why Choose Ambrose Power for Maintenance

NETA-certified technicians with testing and diagnostic experience across MV and HV systems
Same systems our construction crews build. We know the equipment because we install it.
Scheduled programs, not just one-time service calls. Annual and semi-annual maintenance plans tailored to your facility.
Detailed reports with trending data. Track equipment condition over time to plan replacements before failures.
One company for construction, commissioning, and maintenance. Ambrose Power handles the full lifecycle.

Ready to Start Your Project?

Contact us today to discuss your maintenance services requirements and timeline.

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We are always looking for skilled electricians, linemen, and professionals who share our commitment to safety and quality.