scholarly journals Voltage characteristic as a parameter for surge arrester diagnosing

Author(s):  
En Dar Kim ◽  
Ian Korostelev

An alternative method for field MOV surge arresters diagnosing was observed, the controlled characteristic was the surge voltage of a gap arrester. The condenser that was connected in series with gap arrester was applied as voltage measurement sensor. Electrical aging of active elements (MOV), surge arrester insulation degradation and other types of electric faults causes to voltage increase at capacitor. The voltage value can be measured directly or the energy stored in capacitor can be transformed to electromagnetic signal and, then, registered remotely by specific radio transceiver. The capacitor connected in series with the surge arrester can also be used for leakage current limitation during all the life period of surge arrester. Shunted with a spark gap and presented as the low-current gap arrester with pre-sated discharge voltage glass (porcelain) pin-cap insulator can be the simplest, but reliable sensor.  Taking into consideration modern technologies the surge arrester statement continuous monitoring system can be designed. It also allows locating the place of damaged arrester that is particularly true for remote maintenance of equipped with surge protection devices electrical

Langmuir ◽  
2015 ◽  
Vol 31 (22) ◽  
pp. 6253-6264 ◽  
Author(s):  
Noor H. Jabarullah ◽  
Emanuele Verrelli ◽  
Clayton Mauldin ◽  
Luis A. Navarro ◽  
Josh H. Golden ◽  
...  

2018 ◽  
Vol 19 (6) ◽  
pp. 43-46
Author(s):  
Andrzej Białoń ◽  
Łukasz Zawadka

The article presents na issue of determinating an optimal distance between varistors located on 3 kV DC catenary. Line attenuation as a function of distance has been determined during preliminary tests for the following measurement configurations: catenary network unloaded (open), catenary network charged by a value of resistance close to the value of wave impedance of the catenary network test section, catenary network charged by a low voltage varistor. The results allowed to estimate the optimal distance between the varistors and they were verified on the catenary network on Żmigród Test Ring using a surge generator with an amplitude of about 15 kV and varistors designed to work in railway enviroment. The methodology and results of these studies were presented and analyzed in this paper.


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