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Ciros Rakijos. Mark Jaffe. Giovanni Gomez Morales. Thiago Cabral. Mihail Gheorghe. These safety controls are laid down in national and international regulations and must be checked at regular intervals.
All safety controls are always based on insulation resistance measurements. One specific application of this capability is quick and accurate measurement of power pylon grounds. New regulations and increasing ido mains voltages make ever greater demands on the measuring engineer and his test instruments.
Before measuring, the instruments identify existing interference and select a measurement frequency to minimise its effect. Other insulation meters in this category can, at best, provide an instrument with analog display whose size and weight do not meet the wishes of the users.
Selective measurement at high voltage pylons: Overvoltage suppressors or other voltage limiting elements also have to be tested for faultless functioning. Earthing, the connection of exposed conductive parts to the earth in case of a fault, represents the most fundamental safety measure.
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Measuring rate: Internal resistance: Max. Selective earthing resistance RA with supplementary current transformer switch position measuring range resolution. Transformer ratio: Resistance R Automatic range selection Measuring time: typ.
AFC switchable intrinsic error operating error 0. AFC resolution intrinsic error operating error 0. A Current transformer A, opening up to 12 mm, A for selective earth resistance measurements A Adapter for stakeless earth measurements 2 clamps necessary Split-core current transformer for measurements on high voltage pylons up to mm Accumulator set mAh 1,5 Ah NiCd-Accu, electronics, mains adapter Accumulator set mAh 0,6 Ah NiCd-Accu, electronics, mains adapter, cable for 12 V car system, manual.
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