Special Fuses catalogue

NH Battery Protection fuse-links

The use of batteries is growing due to the utilization in renewable installations.These batteries shall be appropriately protected against overcurrents that could shorten its life, specially against short-circuits, that shall be interrupted in a very short time. NH BATTERY fuse-links from DF Electric are capable to clearing all types of overcurrents, overloads and short-circuits, thus the fuse-links protect the batteries as well as cables and all switchgear of installation.

These fuse-links are designed and manu- factured with the same techniques that semiconductor fuse-links, which makes them very fast of operation and gives a good performance under continuous charge / discharge cycles. They are optimized to have reduced power dissipations that allow the utilization of a wide range of fuse-bases, disconnectors and fuse-switch-disconnectors. NH BATTERY fuse-links range comprise five sizes NH000, NH00, NH1, NH2 and NH3 with rated currents between 20A and 630A, with working voltages up to 440 V DC and 550 V DC. These fuse-links can be used also as a protection in other DC applications, but it is very important to take into account the kind of load and the time-constant of circuit in order to have a correct application (consult us).

 

Fuse-links for multimetters

DMM fuse links are specially designed for the protection of multimeters. They have fast acting characteristics and are available in two rated currents: 0,44A (440 mA) and 11A. Intended to carry 100% of rated current continuously. Maximum working voltage is 1000V AC/DC.

 

Fuses for lighting applications

Supply of public lighting systems in urban streets, roads, tunnels and motorways in low voltage cause some problems with voltage drop and high energy losses that lead to the utilization of high cross section of conductors when lines are very long. To avoid these invonveniences, supply networks at higher voltages are usually used (between 900V and 5500V AC) by means of special transfomers designed for this purpose that increase the voltage for transportation and reduce it in the destination at adequate levels. These distribution networks allow energy transportation at very high distances with installations more economic and efficient.

For protection of these networks in the medium voltage(MV) side it is necessary to use fuse links with adequate rated voltages. MV cylindrical fuse links range lighting applications from DF ELECTRIC comprise three sizes with dimensions 10×85, 10×150 and 10×180 mm, with rated currents between 2A and 12A, and rated voltages of 1500V AC, 2500V AC, 3200V AC and 5500V AC. They have a g breaking range (protection against overload and short-circuits) and are made with ceramic tubes having high breaking capacity and good withstand against thermal chock. Contacts are made in silver plated copper.

 

download