Preventive maintenance
Scheduled inspections, cleaning, torque and thermal checks, filter and fan service, and firmware updates, to the manufacturer’s maintenance schedule.
Torus Power Services
Field services for inverters, transformers and battery systems.
Commissioning, maintenance, repair and testing on utility-scale solar and storage plants, closed out with a signed test report.
Inverter commissioning
Cold and hot commissioning for central and string inverters.
From first checks through utility backfeed, performance testing and utility witness testing, we follow the manufacturer’s procedure and document every result, so the plant goes into service with a complete commissioning report.
Cold, before energization
Insulation resistance, wire tightness and torque checks on busbar and cable terminations, equipment and arc-flash label verification, fuse size verification and enclosure inspection.
Hot, energized
DC polarity checks, auxiliary power-up, firmware and parameter setup, Modbus register mapping, utility backfeed, grid synchronization, reactive-power settings, plant performance testing and utility witness tests.
Platforms
OEM platforms we service.
Commissioning, maintenance and repair experience on equipment from these manufacturers. Ask about other platforms; we’ll tell you plainly whether we’ve worked on them.
Maintenance and repair
Keep inverters and PCS producing.
Corrective repair
Fault-finding and component replacement on inverters and PCS: power modules, contactors, fuses, fans, control boards and cooling parts.
OEM warranty work
Warranty diagnostics, part replacements and retrofits performed for equipment manufacturers, with the documentation they require.
Transformer testing
Pad-mount and step-up transformer testing.
Baseline tests at commissioning and condition checks during operation, so problems show up before a failure takes a block offline.
- Insulation resistance, polarization index and dielectric absorption ratio
- Turns ratio and winding resistance on every tap
- Sweep frequency response analysis (SFRA): a baseline fingerprint, and comparisons after transport or a through-fault
- Oil sampling for dissolved gas analysis: drawn on site per ASTM D923, analyzed by an accredited lab per ASTM D3612, interpreted per IEEE C57.104
Diagnostics
Find problems before they become failures.
Infrared thermography
Radiometric surveys of switchgear, combiners, inverters and terminations to find hot spots before they fail.
Power quality
Class A logging of harmonics, sags, swells and unbalance, checked against IEEE 519 and the interconnection requirements.
Cable testing and fault location
VLF withstand and tan delta testing on medium-voltage cable, and fault location on DC and medium-voltage runs.
Root-cause investigations
When equipment fails, we find out why.
Field failures go through an 8D investigation. You get a written report with the evidence, not just a replaced part.
Contain
Contain the problem.
Collect
Collect the data.
Find
Find the root cause.
Verify
Verify the root cause.
Correct
Correct it and confirm the fix.
Test procedures
What we test, and what you receive.
| Test | Typical equipment | Reference | You receive |
|---|---|---|---|
| Inverter cold and hot commissioning | 1500 V-rated meter, insulation tester, Modbus laptop | Manufacturer procedure; IEEE 1547 commissioning requirements | Commissioning report with string voltage and polarity log and as-left settings |
| Insulation, turns ratio and winding resistance | Insulation tester, TTR test set, micro-ohmmeter | IEEE C57.12.90; ANSI/NETA ATS | IR, PI and DAR values; ratio error; winding resistance by tap |
| Sweep frequency response (SFRA) | SFRA analyzer | IEEE C57.149; IEC 60076-18 | Frequency response traces and comparison to baseline |
| Transformer oil (DGA) | Sampling kit; accredited third-party lab | ASTM D923; ASTM D3612; IEEE C57.104 | Lab report: dissolved gases, moisture and oil quality |
| Infrared thermography | Radiometric infrared camera | ANSI/NETA MTS | Thermal images with temperature-rise ratings |
| Medium-voltage cable testing | VLF test set | IEEE 400.2 | Withstand and tan delta results |
Owner’s QA/QC
Independent quality checks for owners and developers.
We check that construction matches the drawings, the manufacturer’s instructions and the NEC.
- Hold-point inspections at each stage of construction
- Punch lists with photos and code references
- Re-inspection until every item is closed
Next step
Need commissioning or a service call?
Tell us the site, the equipment and what’s happening. For an outage, call and we’ll talk through next steps.