Technical Handbook 113
Note: the following description assumes that HS315 can open/close the GCB circuit breaker.
This is optional: depending on the plants, HS315 can have both opening/closing commands,
only the opening command, or none. If HS315 has both commands, then the following
description applies.
Instead, if HS315 has the opening command only, it will open GCB
only when required by a protection; in normal situations HS315 will not open GCB
because it will not be able to close it again.
HS315 provides for three main working modes:
•
OFF/RESET
: HS315 controls the opening of GCB circuit breaker and stops the
engine. Where provided, it also controls the closing of the other circuit breakers. The
anomalies are all cancelled, and you can access the programming to modify the
parameters.
•
MAN:
the starting and stopping of the generator will be executed by the operator. GCB
circuit breaker (and, where applicable, all other circuit breakers) opening/closing as
well will be executed by the operator: HS315 always allows the opening of the circuit
breakers; it allows closing GCB only if the engine is started and if generator voltages
and frequency are within tolerance. Protections are active: HS315 is therefore always
able to open the circuit breakers and stop the engine. Accessing programming is
allowed, though only some parameters can be modified.
•
AUTO:
the starting and stopping of the generator and the management of the circuit
breakers are executed by the controller (the operator cannot intervene). All protections
are enabled. Accessing programming is allowed, though only some parameters can
be modified.
The operating mode can be selected in three different ways:
•
Using the “MODE ▲” and “MODE ▼” buttons of the controller. The buttons must be
pressed consecutively and held for at least half a second to force mode change. The
buttons are disabled (on the first line of the display a key-shaped icon appears) if at
least one of the inputs described below exists and is active.
•
Using one or several digital inputs configured with the following functions:
o
DIF.2271 -
“Remote OF”.
o
DIF.2272 -
“Remote MAN”.
o
DIF.2273 -
“Remote AUTO”.
When one of these inputs is active, the mode of the controller is forced, and the
buttons and even the controls from the communication ports cannot be used.
When none of these inputs is active, it is again possible to use the buttons or the
controls from the communication ports to change the operation mode.
If there are multiple active inputs at the same time, priority is given to the input
that forces the OFF / RESET mode, followed by the one that forces MAN mode
and finally the one that forces AUTO mode.
You needn't use all three inputs. For example, it is possible to use only one input
to force the status of AUTO: when the input is active, the board is always in AUTO,
when the input deactivates, the board returns to the mode selected with the key
selector.
If only one input is used to force OFF/RESET mode, the controller acts
differently: when the input is active, the controller is always in OFF/RESET
Содержание HS 315
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