Testing & Maintenance

Electrical Maintenance Testing

Scheduled field testing of switchgear, breakers, transformers, cable, and relays that trends equipment condition, helps prevent unplanned outages, and supports NFPA 70B and ANSI/NETA MTS programs.

Request a Quote

Call (321) 550-1192

Scope

Switchgear, breakers, transformers, cable, relays

Deliverable

Trended condition report by asset

Standards

ANSI/NETA MTS · NFPA 70B

Electrical Maintenance Testing – NewEra Testing

Service Overview

Find the weakness before it becomes an outage.

Insulation, contacts, and connections degrade in service. Maintenance testing measures it, so repairs happen on your schedule. NewEra Testing performs field inspection and testing of power distribution equipment in accordance with ANSI/NETA MTS and NFPA 70B, comparing results against manufacturer data, previous test history, and published acceptance values. You receive detailed technical documentation that trends condition over time and identifies which assets need attention first.

Equipment covered

Low- and medium-voltage switchgear

Switchboards, panelboards, and busway

Low-voltage power and molded-case breakers

Medium-voltage vacuum and SF6 breakers

Liquid-filled and dry-type transformers

Medium-voltage shielded power cable

Protective relays and trip circuits

Motor control centers

Motors and generators

Automatic transfer switches

Testing & Capabilities

Diagnostic tests that reveal real equipment condition

Standards-driven field test methods applied to each asset class, with results trended against prior data so developing problems surface before they force an outage.

Insulation Resistance & PI

Insulation resistance on switchgear, cable, and transformers. Polarization index and dielectric absorption ratio on motors and generators per IEEE 43.

Insulation Resistance & PI

Insulation resistance on switchgear, cable, and transformers. Polarization index and dielectric absorption ratio on motors and generators per IEEE 43.

Contact & Connection Resistance

Micro-ohm testing of breaker main contacts, bus joints, and cable terminations, supported by infrared thermography to locate high-resistance connections under load.

Contact & Connection Resistance

Micro-ohm testing of breaker main contacts, bus joints, and cable terminations, supported by infrared thermography to locate high-resistance connections under load.

Circuit Breaker Performance

Timing and travel on medium-voltage breakers, trip unit testing on low-voltage breakers, and operational checks confirm each breaker trips when called on.

Circuit Breaker Performance

Timing and travel on medium-voltage breakers, trip unit testing on low-voltage breakers, and operational checks confirm each breaker trips when called on.

Transformer Diagnostics

Power factor, turns ratio, winding resistance, excitation current, and insulating fluid sampling for dissolved gas analysis on liquid-filled units.

Transformer Diagnostics

Power factor, turns ratio, winding resistance, excitation current, and insulating fluid sampling for dissolved gas analysis on liquid-filled units.

Medium-Voltage Cable Diagnostics

VLF withstand, tan delta, and partial discharge assessment on shielded medium-voltage cable to track insulation aging before it leads to failure.

Medium-Voltage Cable Diagnostics

VLF withstand, tan delta, and partial discharge assessment on shielded medium-voltage cable to track insulation aging before it leads to failure.

Protective Relay Verification

Secondary injection testing of protective relays and trip circuits confirms protection still operates to the issued settings.

Protective Relay Verification

Secondary injection testing of protective relays and trip circuits confirms protection still operates to the issued settings.

Applicable Standards

Performed to recognized industry standards.

ANSI/NETA MTS

Maintenance Testing Specifications for Electrical Power Equipment and Systems

NFPA 70B

Standard for Electrical Equipment Maintenance

NFPA 70E

Standard for Electrical Safety in the Workplace

IEEE 43

Recommended Practice for Testing Insulation Resistance of Electric Machinery

IEEE C57.152

Guide for Diagnostic Field Testing of Fluid-Filled Power Transformers, Regulators, and Reactors

From the Field

Methodology

How every job runs.

Scope & Review

We review drawings, one-lines, and the settings issued by the engineer of record or client before mobilizing.

Scope & Review

We review drawings, one-lines, and the settings issued by the engineer of record or client before mobilizing.

Safe Mobilization

Job briefing, hazard awareness, arc flash precautions, and proper PPE are in place before any test begins.

Safe Mobilization

Job briefing, hazard awareness, arc flash precautions, and proper PPE are in place before any test begins.

Test & Verify

Relay settings are applied and verified; equipment is tested against ANSI/NETA and manufacturer acceptance criteria.

Test & Verify

Relay settings are applied and verified; equipment is tested against ANSI/NETA and manufacturer acceptance criteria.

Document & Deliver

Detailed technical documentation records results, as-left settings, and deficiencies — ready for your records and the next test cycle.

Document & Deliver

Detailed technical documentation records results, as-left settings, and deficiencies — ready for your records and the next test cycle.

Related Services

Related services

All Services

Switchgear & Circuit Breaker Testing

Acceptance and maintenance testing of low- and medium-voltage switchgear and circuit breakers. Insulation, contact resistance, timing, and trip verification performed to ANSI/NETA specifications.

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Transformer Testing & Maintenance

Field testing and maintenance of liquid-filled and dry-type transformers. Insulation, turns ratio, winding resistance, power factor, and oil sampling, performed and documented to ANSI/NETA and IEEE practices.

View service →

Medium-Voltage Cable Testing

VLF withstand, tan delta, and partial discharge testing for medium-voltage cable. We confirm new installations and assess aged insulation before it fails in service.

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FAQs

Answers to common questions

How often should electrical equipment receive maintenance testing?

It depends on equipment condition, criticality, and operating environment. NFPA 70B and ANSI/NETA MTS both provide interval guidance, with shorter intervals for equipment in poor condition or critical service. Trended results from each visit help refine the schedule over time.

Does maintenance testing require a full outage?

Not always facility-wide, but most diagnostic tests require the equipment under test de-energized in an electrically safe work condition per NFPA 70E. Infrared thermography and some visual inspections are performed energized. We plan scopes around scheduled shutdowns.

What is the difference between acceptance and maintenance testing?

Acceptance testing, per ANSI/NETA ATS, verifies new equipment before energization. Maintenance testing, per ANSI/NETA MTS, evaluates in-service equipment at intervals, comparing results with baseline and prior data to detect deterioration before it causes a failure.

What do we receive after a maintenance testing visit?

Detailed technical documentation for every asset tested: nameplate data, test results, comparisons with prior readings and acceptance values, and clearly flagged deficiencies. The report gives your team a defensible record for NFPA 70B programs, insurers, and repair planning.

How often should electrical equipment receive maintenance testing?

Does maintenance testing require a full outage?

What is the difference between acceptance and maintenance testing?

What do we receive after a maintenance testing visit?

Request a Quote

Schedule testing, commissioning, or emergency field support.

Share your scope and schedule — a field service technician is dispatched on request. Call (321) 550-1192 or email nelson@neweratesting.com. Hours 7:00 am – 7:00 pm.

Request a Quote

Call (321) 550-1192

nelson@neweratesting.com

Switchgear lineup with protective relays and control devices

Request a Quote

Schedule testing, commissioning, or emergency field support.

Share your scope and schedule — a field service technician is dispatched on request. Call (321) 550-1192 or email nelson@neweratesting.com. Hours 7:00 am – 7:00 pm.

Request a Quote

Call (321) 550-1192

nelson@neweratesting.com

Request a Quote

Schedule testing, commissioning, or emergency field support.

Share your scope and schedule — a field service technician is dispatched on request. Call (321) 550-1192 or email nelson@neweratesting.com. Hours 7:00 am – 7:00 pm.

Request a Quote

Call (321) 550-1192

nelson@neweratesting.com