Commissioning & Energization Services
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At SRESTA, we offer a wide range of high-precision electrical testing services to ensure the integrity, safety, and performance of your power systems. Our expert engineers and certified technicians utilize advanced diagnostic equipment to detect faults, verify functionality, and ensure your equipment operates reliably under real-world conditions
Our Commissioning & Energization services include:
Primary Current Injection Testing
This test ensures that protective devices are functioning correctly by simulating high primary currents under actual fault conditions. This validates circuit breaker CT ratios, wiring, and trip settings. During commissioning, it’s essential to examine the effectiveness of the protection system.
What we do:
- Use high primary currents to simulate real fault conditions and test protection device response.
- Examine Current Transformer (CT) ratios and polarity for precise measurement and protection coordination.
- Confirm relay trip settings and collaborate with associated circuit breakers to ensure correct operation.
- Take note of the connection and strength of wiring between protection devices, CTs,and relay.
- Document test results and submit a detailed report detailing system performance, any deviations or required changes.
AC/DC Hi-Potential (Hi-Pot) Testing
The High potential (Hi-Pot) test is done to safeguard cables, transformers, switchgear, and other equipment that have insulation within them. It is provided a high voltage (AC or DC) which ensures a good insulation can handle operational stress. These tests help to identify insulation breakdown points and weak spots. It is a critical safety step before system energization.
What we do:
Apply high voltage (AC or DC) to electrical equipment such as cables, transformers, and switchgear.
Measure leakage current to evaluate the strength and reliability of insulation systems.
Detect weak spots, cracks, or insulation breakdowns that could lead to future failures.
Test both phase-to-ground and phase-to-phase insulation to ensure complete system integrity.
Produce a detailed test report that highlights insulation performance and problems within the equipment if any.
Power Factor & Insulation Resistance Testing
These tests evaluate the dielectric strength and the insulating condition of electrical assets. Power factor testing indicates the presence of moisture, dirt and deterioration in insulation. Insulation Resistance testing saves you from electrical shocks, equipment failures, and fire hazards. By checking the system at regular intervals you can assure a high operational lifespan with improved reliability.
What we do:
Perform Power Factor testing detects insulation aging, moisture ingress, and contamination in equipment like transformers and cables
Use megohmmeters for Insulation Resistance (IR) testing, it allows measuring the resistance value between the conductors and earth
Match your testing data against the desired benchmarks present with you, to get an idea of health of your insulating system.
Lets detect the early factors for insulation breakdowns and make timely maintenance plans.
A detailed testing analysis, and after nearly comparisons our team will provide your comprehensive test report.
Tan Delta Testing (CTs, CVTs, Transformers, Generators)
Tan Delta Test identifies the ageing and degradation of insulation in high voltage equipments. Therefore, this is a trustworthy diagnostic asset in the plans for preventive maintenance. The increase in tan delta value indicates insulation breakdown or contamination. In not in enough, this test is nondestructive and gives equipment longer operational life by avoiding catastrophic failures.
What we do:
Perform measurements of Tan Delta (also known as Dissipation Factor) to evaluate the quality of insulation in high voltage equipment.
Apply a controlled voltage and measure the phase angle displacement between Voltage and Leakage Current.
Identify insulation ageing, moisture ingress, contamination of partial discharges within the equipment.
Track trends by comparing current results to historical information to monitor the health of the insulation property over a span of time.
Provide a comprehensive diagnostic report with recommendations for future maintenance or equipment replacement.
System Energization & Performance Validation
This includes safely energizing the entire electrical system and ensuring that it behaves according to design and load requirements and Check for all parameters such as voltage, current, protection operations etc was carried out. This generates a performance report for documentation and future reference purposes.
What we do:
We, Safely Energize the entire electrical system following standard operating procedures and safety protocols.
Check Against design specifications including the voltage levels, current flows, phase balance.
Test the protection relays, circuit breakers & interlock functions under real operating conditions.
Monitoring the system response under load conditions to guarantee stable and reliable performance.
Produce a comprehensive performance validation report that includes all test observations and results.
Partner with SRESTA for Reliable Electrical Solutions
At SRESTA, we are committed to delivering trusted expertise in high-voltage electrical testing, commissioning, and maintenance services. With years of hands-on experience and industry-recognized certifications, we specialize in ensuring that your electrical systems function safely, efficiently, and without interruption. Our services are built on a foundation of precision, reliability, and compliance with the latest industry standards. Whether it’s a critical substation, a power plant, or a large industrial installation, we approach every project with meticulous attention to detail and a commitment to long-term performance.
We understand that electrical infrastructure is the backbone of every operation, which is why we provide tailored solutions that address both current needs and future challenges. From detailed equipment diagnostics and fault analysis to system upgrades and preventive maintenance, our team is equipped with advanced tools and a problem-solving mindset. We don’t just test and maintain—we partner with you to improve operational efficiency, reduce downtime, and extend the life of your critical assets.
Reach out to us today—let’s power your success together.