Thanks to the addition of a new Multiple Timing Test (MTT) feature, you can now conveniently perform an even wider range of substation and relay protection system tests with Megger’s multifunction SVERKER 900 test set. In particular, the new feature provides you with an invaluable aid for checking the performance of overcurrent devices with an IDMT (inverse definite minimum time) tripping characteristic.
The SVERKER 900 now provides you with functions that cover all of the major requirements for single- and three-phase testing in distribution substations and it is, therefore, an attractive choice for distribution network operators (DNOs). You’ll also find it ideal for testing protection systems in renewable power generation installations and in industrial applications.
To make it easy for you to work with, the SVERKER 900 has an intuitive user interface that is accessed via a large colour touchscreen: you simply use the screen to choose among pre-configured virtual test instruments, which means you can select the test function you need quickly and easily. The SVERKER 900 also has a powerful internal processor, so for most types of manual and semi-automatic testing, you won’t need to use an external computer.
When you select the new MTT test function, you can, in a single test, inject multiple currents with different amplitudes and monitor the tripping time for each current. You can also set the maximum time for which each of the currents is applied. This allows you to confirm IDMT tripping characteristics quickly and easily without needing to perform multiple tests. To make the results easy for you to inspect and interpret, the instrument displays them in both graphical and tabular formats.
You can use SVERKER 900 test sets to perform many other tests. They provide you with three current and four voltage generators, and you will find the extra voltage generator particularly useful when testing distance protection with synchro-check function.
You can adjust the amplitude, phase angle and frequency of all current and voltage generators individually and you can also connect the current and voltage generators in parallel or series to provide single-phase outputs of up to 105 A and 900 V. This means that, although the test set is principally designed for testing protection relays, you can also use it for current transformer testing, when it will graphically display the knee point value of the CT.
Among the many applications for which you’ll find the SVERKER 900 well suited are commissioning and maintenance of distribution substations and generator installations; testing electromechanical, static and numerical protection relays; plotting current transformer excitation curves; burden measurement for CTs; polarity/direction measurement; impedance measurement; single- and three-phase injection testing in switchgear; checking SCADA annunciation and measurement values; and performing network measurements.
