Műszaki könyvtár

Töltse le a legújabb Villamos mérőkészülékek katalógusunkat, és ismerje meg a villanyszerelőknek, villamos mérnököknek ajánlott korszerű vizsgálókészülékeinket!

The fault current is set to 80mA tosimulatethe high current generated at the intermittent earth fault. The zero voltage is set to 20V;theconfiguration ismade in13 states.The fault states and the first two memory states are set to 20ms. The memory states havetimesselected togetthetrip as close to set time 1,2s as possible. In generator configuration,set U4gen to aux voltage DC.Set “Advanced mode” in SVERKER configuration.

This guide discusses the causes of insulation degradation on >1kV power cables, and the process of measuring degradation before a fault can develop. The guide also recommends the best equipment to use with reference to IEEE standards.

Both natural and man-made drivers are spurring not only technological growth but are changing the nature of the electric grid. Concerns over global warming are only being compounded by the continuing billion dollar weather events. This is acting as a catalyst for the green reform and being realized in the growth of distributed generation (DG).

Reducing the risk of failure on high voltage instrument transformers in the transmission system using the application of narrowband dielectric frequency response (NB DFR) on HV CVTs.

Töltse le a Transzformátor-vizsgáló berendezéseinket bemutató katalógusunkat, és ismerje meg az erre a területre ajánlott korszerű vizsgálókészülékeinket!

This is an easy solution to measure the impedance values for cables, the values are used for calculation of compensation factor in distance protection.The compensation factor is first theoretically calculated and these values can now be compared with the measured values.

The test and maintenance of electrical components on rolling stock is not an easy job to do. Some maintainers dismount some of the parts and bring them to a central location for revision and maintenance. This is a cumbersome and time consuming exercise. In many cases, the electrical parts are replaced only when they break down and are not subject to periodical testing. This of course holds a risk as some parts, e.g. circuit breakers, are crucial for safety reasons.

The brochure for the SVERKER900 relay and multifunctional substation test system

 Self-powered relays will be animportant component for the protection of the smart grid.While they allow reducingthe cost of the protection system, they are definitely a challenge for relay test sets, that are required to provide the voltage and current signals to simulate the power system fault, but also the generatedsignals need to have necessary electric power to supply the protection relay.SVERKER 900 is designed to manage this task and this Technical Guide describes how two self-powered relays can be tested.This document guides through the testing of two self-powered overcurrent relaysfrom SEG GmbH (formerly Woodward), WIC-1 and WIP-1, with the relay test set SVERKER 900, for commissioning/maintenance purposes.The Technical Guide details on the principles adopted in the testing with reference to relevant IEC standards and to the relay manuals. In addition,basic instructions on the correct usage of the testing possibilities offered by SVERKER 900are described