• Ess Vee Automation

Surge Arresters/ Surge Controllers

Ess Vee Automation offers Surge Arresters/ Surge Controllers. Surge controllers V20-C are surge arresters of requirements class C to DIN VDE 0675, Part 6 (Draft 02.89) A1, A2. These devices protect low-voltage consumer installations from voltage surges of all kinds. They are available in single-pole to four-pole versions. Type V20-C/ 3+NPE (requirement class C) is a special surge arrester for TN-C-S, TN-S, TT and IT systems. This device was developed for the new requirements of DIN VDE 0100, part 534/ A1, to allow simple, safe installation of the devices. The voltage-dependent active part of the V20-C is a high performance zinc oxide varistor with a highly non-linear characteristic. Among the advantages of this component are an extremely short response time, a low protection level and a high current diversion capacity, combined with long life. A further feature of these devices is that no follow-up current can be registered after the surge has decayed. If the surge arrestor is damaged by overloading, the integral isolating device breaks the connection to the mains. This is signalled by a red fault indicator. Mounting: The V 20-C can easily be installed in any distribution box or switchgear cabinet by snap-fitting to any commercial 35 mm top-hat rail. The poles of multi-pole arresters are connected together by an earthing bridge at the factory so that there is only one earth (PE) connection to make on site. The NPE arrester element type C 25-B+C/NPE and the matching base are designed so that they cannot be plugged in the wrong way round (coding). This ensures correct installation of the upper parts of the arresters.