Sices HS 315, Техническое руководство

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Technical Handbook 215
The controller stores the activation/deactivation of the override of the protections (described
in the following) in the events log:
•
EVT.1082: override of the protections is activated.
•
EVT.1083: override of the protections is deactivated.
For some plant, loads supply is preferred than the engine protection. HS315 can manage
these situations: as the engine can be damaged, this function must be requested by a digital
input (cannot be activated by parameters). To activate the engine protection OVERRIDE, an
input set by t
he function “DIF.2062 – Engine protections override” must be active. When this
input is active, the contro
ller shows it in the display window “S.01” and all the engine alarms
are switched to warnings: In this way the operator receives a signal in case of engine failure,
but the generator will keep powering the loads.
At the end of the document [1]
there is a table that summarize all the anomalies; if in the “Over”
column
the character “E” is present, it means that, in presence of the engine protections
override, that anomaly becomes a warning.
In the same way, in the description of the anomalies in this document (chapter 10), for each
of them it is indicated to which override request i
t is related: if the text “engine” is specified, it
means that, in presence of the engine protections override, that anomaly becomes a warning.
Moreover, also the following generic alarms associated to digital inputs are subject to engine
override (and thus switch to warnings when override is active):
•
DIF.4012
– Latched warning with oil mask.
•
DIF.4013
– Deactivation with oil mask.
•
DIF.4014
– Alarm (block) with oil mask.
•
DIF.4062
– Latched warning subject to engine override.
•
DIF.4063
– Deactivation subject to engine override.
•
DIF.4064
– Alarm (block) subject to engine override.
You can configure override for engine protections including on one or both thresholds set on
each analogue input. To do that, you must use the thresholds configuration parameters: e.g.
for analogue input JM_3 the two parameters for the configuration of the two thresholds are
P.4021 and P.4024. These parameters are bit-managed; through them you can define whether
any alarm triggered by the set threshold being exceeded is subject to engine override (and
therefore shift from alarm to warning). By default, the alarms on the thresholds are not subject
to override, which must therefore be specifically configured. For configuring see par. 5.6.2.
The BoardPrg3 program makes the management of this configuration much simpler.
The controller manages a separate operating time counter when this engine override mode is
active.
WARNING: using this function may seriously damage the engine. SICES cannot, in any
case, be held responsible for damages, resulting from the use of the OVERRIDE
function.
See previous paragraph. To activate the generator protection override, an input set by the
function “DIF.2064 – Override generator protections” must be active.