17
Recorded
information
The left-most digit of the display shows the
register address and the other three digits the
recorded information. The structure of the reg-
isters is presented in the section "Main menus
and submenus of settings and registers".
Register/
Recorded information
STEP
1
Current measured on phase L1, expressed as a multiple of the rated current I
n
. The
register is updated when one of the overcurrent stages (I>, I>> or I>>>) starts or
operates. Then the previous current values will be pushed forwards one step in the
stack while the oldest value is lost. The last five current values recorded are
memorized so that the most recent value is stored in the main register and the other
four values are stored in the subregisters. When the relay starts but does not operate,
the relay module memorizes the maximum current measured on phase L1 during the
start situation.
When the stage operates, the value of the current measured at the moment of
operation is recorded.
2
Register 2 records the events of phase L2. The operation principle is the same as that
of register 1.
3
Register 3 records the events of phase L3. The operation principle is the same as that
of register 1.
4
Duration of the latest start situation of stage I>, expressed as a percentage of the set
operate time or, at IDMT mode of operation, of the calculated operate time. The
register is updated, once the I> stage starts. Then the previously recorded values will
be pushed forwards one step in the stack while the oldest value is lost. The last five
current values recorded are memorized so that the most recently recorded value is
stored in the main register and the other four values are stored in the subregisters.
When the overcurrent stage operates, the counter reading is 100.
Subregister 5 states the number of times stage I> has started, i.e. how many times
the start value of the stage was exceeded, n(I>) = 0...255.
5
Duration of the latest start situation of stage I>>, expressed as a percentage of the set
operate time. The operation principle is the same as that of register 4.
Subregister 5 states the number of times stage I>> has started, i.e. how many times
the set start current of the stage were exceeded, n(I>>) = 0...255.
6
Residual current I
0
measured, expressed as a multiple of the rated current I
n
. The
register is updated each time one of the residual current stages (I
0
> or I
0
>>) starts or
operates. Then the previous current values will be pushed forwards one step in the
stack while the oldest value is lost. The last five current values recorded are
memorized in such a way that the most recent value is stored in the main register and
the other four values in the subregisters. When the relay starts but does not operate,
the relay module memorizes the maximum residual current measured during the
start situation.
When the stage operates, the value of the current measured at the moment of
operation is recorded.
Summary of Contents for SPAA 341 C /E351
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