System and component testing is the heart of Electric Power Inc. Companies invest fortunes in their power systems upgrades or installations, and therefore depend on EPI to test and advise them before they throw the first switch. With multiple companies involved on a single project, EPI can evaluate the overall power system to verify system performance.
Switchgear is the heart of any system. EPI inspects and tests switchgear for loose connections, degraded materials and proper operation. EPI has a long history of detecting and solving problems with switchgear and can draw from a large on-site supply of materials to provide a quick solution when problems are found.
EPI provides both primary injection and secondary injection of circuit breakers and calibrates the breakers to the proper settings per the customer provided coordination study.
Protective Relaying and Controls
EPI provides testing of protective relays and complete relaying systems. This is one of the most crucial services that EPI can provide prior to start-up. Modern control schemes are far more complex than they were only a decade ago. By reviewing submittals and testing relay systems, errors can be detected before they endanger personnel and plant equipment. Post start-up verification is necessary to maintain a safe and effective system.
EPI thoroughly inspects all kinds of transformers (both dry and liquid-filled) with tests such as power factor, capacitance, winding resistance and ratio, insulation resistance and various oil analysis for liquid-filled transformers. EPI can provide oil processing for filling of new transformers and degassing of aged transformers. EPI can replace mineral oil in transformers with biodegradable vegetable oil eliminating the possibility of a hazardous spill from a leaking transformer.
Most sites introduce power through a high voltage switch. EPI can ensure the integrity of the switch via a battery of tests including: contact resistance, over-potential and insulation resistance.
Planned outages are excellent times for EPI to perform regular maintenance such as electrical testing and calibration of components to ensure maximum reliability of power systems throughout the year.
Regular use of infrared surveys can detect heating caused by loose connections or bad contacts before those problems cause costly shutdowns and extensive repairs become necessary.