Energised Test and Inspection
MET None Isolation Service Preventative Maintenance Programme is recommended to be performed annually, and while the facilities electrical distribution system is energised under normal load.
1) True RMS Voltage and Current Testing:
Capture and record the square root of the average square of the instantaneous magnitude of the voltage and current.This service is used to determine if the correct voltage and current is present to properly operate the Owner’s equipment and optimise its life cycle.
2) Voltage Drop:
Measure and record the difference of voltages at the two terminals of passive impedance.This service is used to determine if the Owner’s electrical components, i.e., circuit breakers, contact surfaces, etc., are operating properly to reduce hazards and equipment destruction.
3) Infrared Thermographic Imaging Service:
Measure and record to identify temperatures that exceed the manufacturers recommendations. High resistance electrical connections, current overload, defective circuit breakers and/or defective insulator conditions.This service is used to reduce the risk of component failure, as well as safety and fire hazards.
4) Ultrasonic Testing:
Measure and record sound waves and/or vibrations that are above audible sound (16-18 KHZ).This service is used to complement the thermographic imaging service and determine if corona discharge, tracking, arcing and vibration are present, and to assure the quality and integrity of the Owner’s electrical system.
5) Voltage and Current Harmonics Testing:
Capture and record Total Harmonic Distortion-Voltage (THDV) and Total Harmonic Distortion-Current (THDC) that exceed IET recommendations.This service is used to determine if the Owner’s harmonic contamination is within tolerance levels.In addition, this service is designed to assure accurate power (kW) charges and to minimise the risk of damage to microelectronic equipment, transformers, circuit breakers, motors, etc.
6) Power Factor Testing:
Measure and record the ratio of the circuit power (watts) to the circuit volt-amperes.This service is used to determine if the Owner is paying increased costs to their utility company because the Owner’s power factor is in a higher rate schedule.In addition, correcting a poor power factor situation may allow the Owner to expand their electrical system’s capacity without costly system additions.
7) Visual and Mechanical Inspections:
Interior and exterior of all components will be inspected to ascertain, and if necessary, make certain adjustments to ensure that its performance remains within specified limits.The Contractor will also identify corrosion, rust and discoloration, leaks, safety hazards, applicable electric code violations, grounding, physical damage and the general condition of components.
8) Phase-Balance Measurements:
Assure that the phases in the Owner’s electrical system are balanced.This service is used to address unbalanced components that increase power-quality problems, total harmonic distortion as well as increased temperature rise of devices and current-carrying conductors.