In HVT (High profile Technology), any voltage above 11 kilo-volts is regarded as from the high voltage range. It can be either alternating or dc. Most industries are given using this type of array of voltages in the national grid while many generates their own high profile power using generators. Higher than normal voltages are usually stepped right down to some specific lower voltages, to own their electrical machinery like motors, heaters, HVAC systems, among others. Of these industries, regular checks must be conducted by authorized personnel to guage the fitness of their equipment. Equipment tests are very essential in determining the steadiness of the machine so as to avoid equipment breakdown and large production losses. These tests also aid in determining if your newly purchased devices are worth, before installation. Most manufacturers use hollywood testing to evaluate the insulation with their equipment before supplying them on their customers.
The benefits of applying high voltage insulation testing are often looked down upon by many industries, as a strategy of learning the conditionality of these electrical equipment. This is often greatly related to the fact that much pressure and emphasis is definitely put on production activities with the cost of proactive upkeep of the gear. A reliable and effective insulation to have an electrical machine is so very important for the correct operation every time. Since insulation of it technology degrades as time passes, the respective electrical department for virtually any industry must be regularly conducting regular check-ups for machines as part of their normal working schedule. Make this happen to even low and medium voltage systems.
Generally, a four stage process is followed. The stages are briefly described below:
In-process testing
This is the most rudimentry process which can be done even for the readily installed equipment, so long as it is not running. This procedure necessitates the use of a meggering instrument to try the insulation integrity of the coils prior to it being associated with phases, neutral, and earth. In some cases, a multimeter may also be used. Inter-winding and winding-to-body resistances are checked at this time. Therefore, the dielectric withstanding voltage and insulation resistance of the coil can be discovered.
Ancillary Equipment Testing
This involves testing for insulation resistance and dielectric withstanding voltage for interconnecting cables, hollywood bushings, busbars, and terminations. This is conducted if the components are interconnected or separated.
Generator Assembly Test
In this instance the generator is visually inspected. Cleaning is completed along with the machine's stability can be assessed. The pulse of the machine is observed at close range by using a special display instrument. The device can be meggered for insulation resistance and dielectric withstanding voltage test.
One of the factors to consider in testing equipment are; voltage and right testing equipment. Which are more dependable results testing voltage should be enough to effectively measure the insulating resistance. However, it shouldn't be too much to overstress the gear insulation. The proper testing equipment which could effectively store results enables them to be stored in a computer for archiving and analysis. This treatment saves some time to reduces the chance of error.
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