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EXCOUNT-II

EXCOUNT-II is an advanced surge arrester monitor for intelligent monitoring and recording of surges in high voltage networks.

Discharge operation counters have been available for use with surge arresters for many years, however these have lacked the ability of giving a direct indication of the true health of surge arresters. Even counters fitted with simple mA meters are of very limited use, as they are unable to differentiate between the internal and external leakage currents nor exclude harmonic effects.

More than just a counter
EXCOUNT-II is an entirely new monitoring system, as it can be used as an aid to assess the health of the entire substation by monitoring surges transmitted in and out of the network.The device is fitted to surge arresters within a substation similar to normal counters, but in addition to counting the number of discharges, EXCOUNT-II also records the amplitude of the surges, together with their date and time, plus measures the total leakage current and (optionally) resistive current through the arrester. The measurements are stored in the EXCOUNT-II sensor, and can be collected when convenient with the aid of a hand-held cordless transceiver.
Statistical analysis
The raw data from the transceiver is transferred over to a computer for statistical analysis. The detailed results obtained from EXCOUNT-II are not limited to a simple estimation of arrester stresses but instead give a true indication of the number and severity of surges and, when combined with data from event recorders, SCADA, etc, facilitates an effective analysis of the amount and degree of voltage stress all equipment in the substation has been subjected to.

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Documentation and downloads

Article
A compact 420 kV line utilising line surge arresters for areas with low isokeraunic levelsEnglish
0.14 MB
Design and testing of polymer-housed surge arresters with special emphasize on seismic stresses and selection of specific creepage in costal areasEnglish
0.66 MB
Desing and testing of polymer-housed surge arresters.English
1.26 MB
Energy stress on transmission line arresters considering the total lightning charge distributionEnglish
0.06 MB
Improved transmission line performance using polymer-housed surge arresters.English
0.15 MB
Limitation of switching overvoltages by use of transmission line arresters.English
0.26 MB
New method for measurement of the resistivive leakage currents of metal-oxide surge arresters in service.English
1.54 MB
Optimized use of HV composite apparatus insulatorsEnglish
1.85 MB
Selection, dimensioning and testing of line surge arrestersEnglish
0.09 MB
EnglishEnglish
0.24 MB
Short-circuit current stressesEnglish
0.37 MB
Thermal behaviour of ZnO surge arresters in polluted conditions.English
1.50 MB
Thermal stress on ZnO surge arresters in polluted conditions.English
2.59 MB
Thermal stress on ZnO surge arresters in polluted conditions.English
1.75 MB
Brochure
EXCOUNT-II English
1.49 MB
High Voltage Surge ArrestersEnglish
4.37 MB
Certificate
ISO 9001 & 14001 Certification for ABB High Voltage Products in Ludvika, SwedenEnglish
0.39 MB
Guideline
Application guidelines for station protectionEnglish
1.66 MB
Guidelines for selection of surge arresters for shunt capacitor banksEnglish
0.96 MB
Insulation withstand and clearances with EXLIM and PEXLIM surge arrestersEnglish
0.61 MB