Catálogo fusibles SIBA 2022

NH

Low Voltage Fuses European NH Knife Blade Fuse System

Characteristic Stability Siba LV fuse Links are extremely resistant to aging. Long term overload tests according to VDE 0636 have proven that the cyclic load specified for such a test, applied for a period of 100 hours at a test current being equal to 1.15 times the fuses' rated current has been passed without ageing.

Arc Voltage The arc voltage is considerably below the values specified by VDE 0636-2.

Class aM Fuse Links

SIBA's class aM LV fuse links are designed for the protection of switchgear in motor feeder applications. The special design of the melting element(s) provides reliable service in the limited range of the switchgear. In the range above 4 times the fuse links rated current, SIBA LV aM class of fuse links provides protection of the thermal overcurrent relays and for short circuit current faults prevents contactor points from welding due to the extremely fast clearing time. The high breaking current rating capability of the aM fuse link required by such operation is safely achieved through low cut off currents. Class gTr Fuse Links SIBA's class gTr LV fuse links are designed with a specific T-C curve adapted to the load characteristics of the trans- former. Therefore a better utilization of the transformers overload capacity is achieved. SIBA gTR transformer fuse links are capable of carrying 1.3 times the rated current of the transformer as a continuous load for a minimum of 10hours. At 1.5 times the transformers rated current as a continuous load the fuse operates within two hours. Characteristics per VDE 0636/2011. Class gB Fuse Links SIBA's class gB LV fuse links were developed to provide protection for underground installations of the mining industry, taking into consideration particularly the operating conditions for safety. Characteristics per VDE 0636/2011. Class gG Fuse Links SIBA's class gG LV fuse links with are designed to protect cables and wires. The operating class gG corresponds with VDE 0636 part 2and IEC 60269-2. The particular shape and design of the elements assure low power loss.

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