Switchgear is located at the nodes of electrical power transmission and distribution.
Their reliability has a decisive influence on the availability, safety and economy of electrical supply networks.
Only regular testing at the point of installation can ensure fault-free operation of switchgear throughout its service life.
ACTAS, PROMET and EPOS test systems provide precise information on the condition of the interrupter chamber/breaker unit and actuator without having to open them. The large number of parameters to be determined, the variety of types of switchgear used, and the harsh environmental conditions during on-site testing place the highest demands on the testing technology.
ACTAS test systems allow comprehensive analysis of all types of switchgear, including evaluation of the following parameters:
The test meets all the requirements for assessing the mechanical behavior of high-voltage circuit-breakers according to IEC 62271-100.
After connecting the DUT, the prepared test plan can be started immediately and processed automatically. All required measured values and parameters can be determined within a single test run, but it is also possible to execute each individual test step separately.
The evaluation of the measurement results takes place on the basis of stored limit values or on the basis of fingerprints which are stored with new measurement recordings.
The use of proven hardware components and excellent electromagnetic compatibility guarantee reliable operation of the test systems during on-site tests in the extra-high voltage range.
A basic accuracy of 0.05% with an absolutely linear frequency response ensures tests with the highest precision. The sampling rates for the acquisition of the analog and binary measurement signals can be freely selected in the range of 100Hz...50kHz, the resolution is 16 bit.
Portable ACTAS test equipment is controlled by ergonomic and easy-to-use software, either directly via the 7" touch screen or via PC software developed for Windows® operating systems.
Both software packages are intuitive and simple, so that the devices can be used directly for testing without special training and instruction, saving time and money.
In order to exclude a hazard caused by capacitive voltage coupling from neighboring switchgear panels, switchgear is grounded on both sides if persons are present in its vicinity.
However, when using conventional measurement methods for switchgear testing, the grounding must be removed at least on one side.
With the DYNAMIC timing method, measurements can be performed while maintaining grounding on both sides. This provides a great safety advantage, and by eliminating the steps required to remove the ground wire, testing becomes easier and faster.
The DYNAMIC Timing method allows testing under double-sided grounding, on up to 12 or more interrupting chambers. Unlike evaluation via a simple binary signal, DYNAMIC Timing allows for sound diagnosis of breaker units throughout the entire switching operation. Even switching devices with different contact materials, such as graphite, tungsten or silver, can be reliably and precisely tested with the DYNAMIC Timing method.
The GIS timing method, a function specially developed by KoCoS, enables switching time measurements to be carried out on GIS switchgear earthed at both ends. As with the DYNAMIC timing method, our resistance measuring devices are used as current sources and, in addition, a current pulse is measured via the Rogowski coils attached to the insulated earth electrode, from which the switching time can be determined.
By regularly measuring the static and dynamic contact resistance, precise statements can be made about the condition of the entire contact system. Necessary maintenance work can thus be identified at an early stage and downtimes avoided.
The KoCoS PROMET resistance tester can be used to carry out three-pole contact resistance measurements and integrate them directly into the overall test sequence. The test current can be set to a maximum of 600 A. Even very small resistances in the single-digit microohm range can be measured with very high accuracy. The measured values are included in the evaluation of the test and output in the test report.
A high contact resistance within a switching device leads to high power dissipation, combined with thermal stress and possible destruction of the switching device. Faults such as high contact resistance due to defective connections can be detected by measuring the static contact resistance with the STATIC Resistance Method.
With the DYNAMIC Resistance Method, the resistance curve is determined during a freely definable switching process. The measurement allows, for example, conclusions to be drawn about the length and condition of the arcing contacts in high-voltage switches. Or to make soiling/deposits contact wear in the interrupter unit visible by the resistance curve.
Whatever your request, we‘re here for you.
Whatever your request, we are here for you! Just enter contact details and the subject of your request and we will be happy to get back to you personally.
Or e-mail to: info(at)kocos.com
Let‘s stay in touch!
Subscribe to the KoCoS newsletter and be the first to know about our products, updates and other news.