Megger Programma Sverker 750, User Manual

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S V E R K E R 7 5 0 / 7 6 0
P r o g r a m m a E l e c t r i c A B
Z P - C D 0 1 E R 0 5 A
2.2 Design and
construction
The current source built into Sverker can provide 0-
10 A, 0-40 A, 0-100 A, 0-250 V AC or
0-300 V DC. Timing and generation (output) can be
carried out simultaneously. When the relay protec-
tion equipment trips, both output and timing are
interrupted.
Note! The current output depends on the
burden of the relay (circuit). This means
that it is possible to get high output
currents, over the maximum measure-
ment range of 250 A.
There is also a separate built-in AC voltage source.
It can be varied from 0 to 120 V AC, and it is used
to supply the relay voltage input.
A 20-220 V DC voltage source is used to provide
auxiliary voltage.
Using transformer technology in Sverker design
gives both advantages and disadvantages. One
disadvantage is that the quality of the output signal
is depending on the quality of the input voltage. if
the main voltage is distorted the output signal will
also be distorted.
Sverker is equipped with a timer, ammeter and
voltmeter, and these instruments can also be used to
indicate resistance, impedance, phase angle, power
and power factor. Moreover, these instruments can
be used for measurements in external circuits.
A set of resistors and a capacitor are provided, and
they can be connected into the circuits being tested
to provide phase shifts, fine adjustments and the
like.
A make/break contact can be used to synchronize
other circuits with tests that are being conducted.
Sverker settings are made using knobs and other
controls on the control panel. Numerous other
settings can be made via the display window built
into the control panel.