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Product documentation 1D 3.8.en Rev. E, 10/13 page 40/42
7.2 Range of voltage regulation
Terminal voltage can be adjusted in the range of ±5,0% of nominal voltage by means of potentiometer that is
situated on regulator. There is an option of supplying external potentiometer designed for remote control.
Optionally it can be supplied with motor control.
7.3 Regulation accuracy
Static accuracy of regulation is ±1% in the range from running without load up to full load as well as during
constant output and change of revolutions of up to ±5,0%.
Other information about regulation accuracy on demand.
7.4 Dynamic states of voltage
Temporary drop of voltage that occurs during connection of full load with power factor cos ϕ makes normally
up to 20%. This value depends on generator size. Time of reregulation makes about 1,5 - 2 s and depends on
the size of regulator.
7.5 Parallel operation
Synchronous generators 1D are suitable for parallel operation with another generator and network. In
the course of parallel operation, distribution of active load is determined by driving machines. To secure
uniform distribution of active load, regulators of revolutions of parallely working driving machines must be
adjusted at the same characteristics. They can even be equipped with electronic load regulator.
Concerning parallel operation, generators are equipped with static regulator to secure good distribution
of reactive load. Inclination (gradient) of reactive current characteristics can be changed by means of
adjusting of resistance in static regulator.
Statics is set by producer to a value of about 6% - possible range of adjustment is 10%. This adjustment
enables voltage swing up to ±2,5% in parallel operation of network without exceeding maximum reactive
generator current. If higher line voltage swing appears, it is necessary either to increase statics or and to
regulate terminal voltage by means of power factor regulator.
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