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Short Circuit Indicator type MF |
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| Application The short circuit indicator type MF is used in distribution networks with a radial layout and one input. It is recommendable to use this indicator in case of sight disturbance, for the protection of labour or for other reasons which makes it necessary. An LED indicates the short circuit. The reading instrument needs an independent power supply. |
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| General Description The short circuit indicator type MF consists of a reading instrument, 3 sensors and 3 light mains, respectively cables. It is available in two versions: Version " L " (2) (3) It is possible to install the sensor on unscreened cables. The sensors and the reading instrument are connected by light mains. Version " S "(1) (2) The sensors have to be mounted on screened cables only. The connection to the reading instrument is carried out via copper -cable. The sensors are fixed on the high voltage cable with a frame. They can be mounted on round cores with a diameter of 15 to 65 mm, respectively on angular cores from 5x20 mm to 60 x 12 mm (precision: +/- 10%). With the version "L", the operating point is adjusted seperately at each sensor, with the version "S" it is centrally adjusted at the reading instrument. The reading instrument is available for surface-mounting (1) (3) or panel- mounting (2). The reading instrument evaluates the detected short circuit impulses and transmits them for indication. The indicator will reset after a preadjusted time. Manual reset is possible at any time. |
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Short circuit indicator type MFoperating level: (A) ______lenghts of light mains: (mm) _______ |
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