ABB EXCOUNT-III Surge Counters
Surge Counters for Surge Arrestors | ABB EXCOUNT-III
EXCOUNT-III
EXCOUNT-III are advanced surge counters for intelligent monitoring and recording of surges in high voltage networks.
EXCOUNT-III is a complete remote real-time surge arrester monitoring, diagnostics and analysis system. It permits the registration of the total number of discharges, the surge amplitude and wave-steepness, the date and time of occurrence, the total leakage current as well as the resistive leakage current through the surge arrester. In addition, the equipment can be used to define the residual voltage across the arrester for the actual surge, which in turn can be used to better estimate overvoltages in the station for a more detailed insulation co-ordination evaluation.
EXCOUNT-III supports the protocol IEC 61850, Ed. 2, and communicates remotely via the fibre optic cable to permit the user to add signals into an existing data collection system (SCADA). Enabling remote retrieval of data, EXCOUNT-III eliminates the need for substation visits solely to monitor surge arrester condition, while also enabling the highest possible personnel safety standard by not having to approach an energized arrester to perform online diagnostic measurements.
Surge Counters are used to monitor the health of Surge Arresters and protect against potentially damaging events which could lead to deterioration and ultimate overload. It is important to also schedule regular checks of surge arresters including visual inspection and diagnostics to detect and prevent a costly power outage.
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ABB Surge Counters
The EXCOUNT surge counter range draws upon over 70 years of experience by ABB in the development of arresters and associated accessories. Safety, functionality and longevity are key elements which are given priority in selection and design of components. In stark contrast to many other competing products, the EXCOUNT surge counters has not neglected short-circuit safety which lies inherent in the design concept.
EXCOUNT-III Surge Counter
Key features and advantages
Registration of surge amplitude and wave-steepness, date and time of occurrence
- Recording of complete surge current impulses at the arrester’s connection point
- Online total leakage current measurement
- Online resistive leakage current measurement through the arrester by third-harmonic analysis
- Data analysis via a web page interface
- Support for IEC 61850 data transfer protocol
EXCOUNT-IIIA provides the measured surge amplitude between 100-20 000 A. EXCOUNT-IIIA registers amplitude, wave-steepness and calculates estimated overvoltage at connection point.
The standard version (EXCOUNT-IIIM) is available for users who do not desire to analyse overvoltages in detail. With this, discharges are only categorized by their amplitude along with a date and time stamp of occurrence. Other generic features are the same between the versions.
The unique features of EXCOUNT-III form a powerful set of tools in the maintenance engineer’s arsenal and set it aside from normal counters in terms of functionality. Alone or with the aid of a SCADA system, the measurements can be used to co-ordinate maintenance work and possible arrester replacement in order to assist with minimizing unnecessary and costly unplanned outages. In its advanced form, EXCOUNT-III can also give system engineers the ability to estimate overvoltages occurring at nearby apparatus within the arrester’s protection zone – providing valuable information about whether the protection against potentially damaging surges is sufficient or not.
Interest for online monitoring is growing, and EXCOUNT-III has been designed to fulfil this need by providing the user with remote real-time monitoring of arresters as well as useful input to the insulation co-ordination of the station as a whole.
EXCOUNT-III Technical data
Please contact Thorne & Derrick should you require any assistance with the selection, specification or purchase or Surge Counters from the EXCOUNT range of products manufactured by ABB.
| Climatic conditions | Sealed water-tight design, IP67 |
| Power supply | 100-250 Volt, AC (50-60 Hz) or DC |
Surge Registration
| Minimum counting threshold (8/20 µs) | Adjustable 100-1000 A | |
| Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â EXCOUNT-IIIM | EXCOUNT-IIIA | |
| Amplitude classification (8/20 µs) |
The surge amplitude is classified as follows 100-999 A 1000- 4999 A 5000 – 9999 A >10 000 A |
The surge amplitude is classified as follows 100-999 A 1000-4999 A 5000-9999 A >10 000 A Additionally, EXCOUNT-IIIA provides the measured surge amplitude between 100-20 000 A. EXCOUNT-IIIA register amplitude, wave-steepness and calculates estimated overvoltage at connection point. |
| Time stamp | Yes | |
| Time resolution | 1s | |
| Memory capacity | 30 Years of data | |
Leakage Current MEasurement
| Measuring range of total leakage current |
0.2-12 mApeak |
| Measuring frequency range | 48-62 Hz |
| Measuring range of resistive leakage current (peak level) |
10-2000 µA |
Communication
| Optical fibre connection | Yes |
| Protocol | IEC 61850, Ed. 2. TCP/IP with web server in the device |
EXCOUNT-III product selection
| Version | EXCOUNT-IIIM |
| Model | 1HSA449000-C |
| Surge counting | Yes |
| Time stamp | Yes |
| Impulse amplitude classification | Yes |
| Impulse amplitude measurement | – |
| Leakage current measurement | Yes |
| Resistive leakage current measurement | Yes |
| Online real-time monitoring | Yes |
| Wave steepness | – |
| Advanced surge analytics | – |
| Overvoltage estimation |
– |
| Version | EXCOUNT-IIIA |
| Model | 1HSA449000-A |
| Surge counting | Yes |
| Time stamp | Yes |
| Impulse amplitude classification | Yes |
| Impulse amplitude measurement | Yes |
| Leakage current measurement | Yes |
| Resistive leakage current measurement | Yes |
| Online real-time monitoring | Yes |
| Wave steepness | Yes |
| Advanced surge analytics | Yes |
| Overvoltage estimation |
Yes |
MV HV | Medium & High Voltage Cable Accessories, Electrical & Safety Equipment
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