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Megger's New SVERKER 900 Provides The Ultimate Toolbox For Substation Testing

Sverker 900 test setPortable test equipment expert Megger has launched a new three-phase protection relay and substation test set that combines versatility with rugged reliable construction, portability and exceptional ease of use.

The SVERKER 900, which is particularly well suited to the needs of distribution network operators (DNOs), features a large colour touchscreen that offers an intuitive user interface, and a powerful internal processor that eliminates the need to use an external computer for most types of manual and semi-automatic testing.

The touchscreen provides access to a wide range of pre-configured virtual test instruments, allowing the required test function to be selected quickly and easily. The functionality covers all major requirements for single- and three-phase testing in distribution substations, and is also ideal for testing protection systems in renewable power generation installations and in industrial applications.

SVERKER 900 test sets provide three current and four voltage generators, the extra voltage generator being particularly useful when testing distance protection with synchro-check function.

The amplitude, phase angle and frequency of all current and voltage generators can be individually adjusted. The current and voltage generators can also be connected 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, it can also be used for current transformer testing and can graphically display the knee point value of the CT.

The main virtual instrument featured by SVERKER 900 instruments provides timing tests as well as options for the manual determination of relay pick-up and drop-out points together with general facilities for generating, injecting and measuring currents and voltages. Also provided are prefault-fault, CT magnetisation, ramping, sequencer and impedance instruments.

The impedance instrument allows relays to be tested directly from the impedance plane with conversion from impedance to voltages and currents carried out automatically by the SVERKER 900 test set.

Full manual control and configuration is supported and, in addition to the touchscreen, the instruments are provided with a large rotary knob that can be configured as required to control the current and voltage generators. Test configurations and test results are stored in internal non-volatile memory and can be readily transferred to and from a PC via a USB port.

To further extend their versatility, SVERKER 900 instruments include four programmable binary inputs, two programmable binary outputs, a timer with separate start and stop inputs, and measuring facilities for voltage, current, resistance, impedance, phase angle, power and power factor.

Applications for SVERKER 900 instruments include commissioning and maintenance of distribution substations and generator installations; testing of 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.


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