Summary Highlights
- Field survey, risk analysis and maintenance-planning studies for HV/MV installations
- Periodic maintenance for MV switchgear, circuit breakers, disconnectors, surge arresters and metering-protection circuits
- HV/MV cable tests (insulation, VLF, etc.), cable route inspection and fault detection
- Grounding, step/touch voltage, lightning protection and lightning protection system tests
- Early fault diagnosis with thermal camera and partial discharge/corona inspections
- Post-fault intervention, repair, commissioning and reporting-based solution recommendations
Service Details
Facilities operating at high-voltage (HV) and medium-voltage (MV) levels in Bursa and the surrounding region, such as factories, industrial organizations in organized industrial zones, power generation facilities, large commercial buildings and infrastructure projects, need regular testing and maintenance. The services described on this page cover field testing, maintenance and repair works for your HV/MV lines, cables and switchgear.
The work process generally starts with a site survey. The current condition of your HV/MV lines, cables, MV switchgear, transformers and grounding arrangements is examined; single-line and protection diagrams are reviewed. At this stage, risky areas, access limitations and the outage plan required for maintenance are determined.
In HV/MV cable tests, insulation resistance measurements, VLF or similar high-voltage withstand tests when necessary, sheath tests and phase sequence/length measurements are carried out. In case of suspected fault, special devices are used for cable fault location and the fault location is narrowed down before excavation.
During thermal camera inspections, MV switchgear busbars, cable terminations, transformer connections, disconnector-circuit breaker contacts and panel internal connections are scanned. Points heating above normal may indicate problems such as loose connections, load imbalance or equipment ageing. These points are highlighted separately in the report.
All data obtained during maintenance and testing works are interpreted by taking the relevant standards (TS/IEC series), manufacturer recommendations and the risk profile of your facility into account. Short-, medium- and long-term action recommendations are prepared for values close to critical levels; in this way, budget planning and outage management become more predictable.
In HV/MV repair works, interventions such as cable joint and termination renewal, connection and bushing replacements, mechanical revisions of circuit breakers and disconnectors, surge arrester and instrument transformer replacements, and rearrangement of busbars are planned according to the type of fault detected. Coordination is provided with manufacturers or authorized services when necessary.
At the end of all maintenance, testing and repair activities, a detailed report is prepared including measurement results, devices used, field notes, photographs and thermal images when necessary. The report includes both the existing condition assessment and improvement recommendations; it can be used as a reference in official inspections.
The service fee is calculated on a project basis according to line and cable lengths, number of MV switchgear cubicles, number of transformers, requested test types, site location and planned outage duration. After the site survey, we prepare clear and comparable proposals for different scope options.
Frequently Asked Questions
For which types of HV and MV installations do you provide service?
We provide testing, maintenance and repair services for factories in organized industrial zones, power generation and distribution facilities, large commercial buildings, infrastructure projects and HV/MV installations belonging to municipalities/public institutions. Transformer substations, MV switchgear, cables and lines are included in this scope. For detailed transformer-specific testing and oil analysis, you can review our Bursa transformer maintenance, testing and oil analysis page.
Which tests are carried out in HV/MV maintenance?
According to the need, MV switchgear maintenance checks, circuit breaker and disconnector function tests, HV/MV cable insulation and VLF tests, grounding and lightning protection measurements, thermal camera scans and, in some projects, partial discharge/corona inspections are applied. The test package is determined together according to the condition of your facility. We work in an integrated manner with our periodic inspection and examination service for official measurement reports and the OHS legislation side.
Is it necessary to stop the entire facility for maintenance and tests?
Some visual inspections and thermal scans can be performed while energized; however, most electrical tests require the line or switchgear cubicle to be safely de-energized. During the planning stage, we evaluate options such as staged outage or weekend/night work to minimize production loss.
How do you determine periodic maintenance intervals?
We take facility type, equipment age, loading profile and previous test results into account. In general, we recommend at least one comprehensive HV/MV maintenance per year; for risky or critical facilities, we plan additional intermediate inspections. To manage long-term operation and regulatory compliance from a single point, we can configure this plan together with our HV operation responsibility service.
Can we receive service for HV/MV installations outside Bursa?
Our main service area is Bursa and nearby provinces. When logistics and planning are suitable, we can also provide testing, maintenance and repair service for HV/MV installations in surrounding provinces. For detailed information, it is sufficient to briefly describe your facility so that we can plan according to scope and location.