Sices HS 315, Техническое руководство

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Technical Handbook 147
HS315 can start, stop and protect the engine by means of a series of thresholds on the
acquired measures (oil pressure, coolant temperature, speed etc.).
HS315 allows specifying the rated power of the engine (P.0125 parameter, in kW). It is
important to set this figure, because the thresholds for some protections are expressed as its
percentage.
The generators are usually designed to work with both the most common frequencies (50Hz
and 60Hz). Obviously, at different frequencies, the rated rotation speed of the engine varies.
Because some thresholds are expressed as a percentage of rated speed, HS315 should know
the present rated speed.
HS315 allows setting two nominal rotation speeds for the engine via P.0133 and P.0134
parameters (both expressed in kW): it uses the one specified in P.0133 ("Primary engine rated
speed") if the nominal frequency (P.0105) is lower than 55 Hz, otherwise it uses P.0134
parameter ("Secondary engine rated speed").
The board can perform a measurement of the engine rotation speed, to display it, optionally
use it to diagnose the statuses of started/stopped engine, and optionally use it to manage a
maximum speed protection (A018).
HS315 can acquire this measure in different ways, listed in the order in which they are
assessed:
•
The measure can be acquired by a pick-up on the engine. See initial chapters for the
connection of the signal. To enable this measure, in P.0110 parameter the number of
teeth of the rim on which the pick-up works should be set. This is a known value and,
anyway, easily computed If P.0110 is set to a nonzero value, the following points are
ignored.
•
The measure can be acquired by the signal W of the engine battery charging
alternator. See initial chapters for the connection of the signal. To enable this
measure, it is necessary to set the ratio between the frequency of the signal W and
the rotation speed in P.0111 parameter (expressed in revolutions/second) of the
engine, and P.0110 parameter should be set to zero. This ratio depends on many
factors and it is not easy to calculate. If a frequency meter is available, simply start the
engine (it will run at is rated and known speed, i.e. 1,500 rpm) and measure the W
signal frequency, and then calculate the ratio. If a frequency meter is not available,
the following method can be used:
o
Set a random value for P.0111 (e.g. 15).
o
Start the engine and, when at operating speed, note the rpm value shown by
the controller.
o
Calculate the ratio between the displayed speed and the actual engine speed
(displayed/actual).
o
Multiply the value previously set in P.0111 by this ratio and set the new value.
o
Restarting the engine, the speed measure should be close to the actual
speed. Then, manually adjust the value P.0111 until you get the right display,
considering that, for the same true speed, the value displayed by the controller
decreases when increasing P.0111. If P.0111 is set to a nonzero value, the
following points are ignored.