18
Register/
Recorded information
STEP
7
Duration of the latest start situation of stage I
0
>, expressed as a percentage of the set
operate time or, at IDMT mode of operation, of the calculated operate time. The
register is updated each time the I
0
> stage starts. Then the previous values recorded
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
stage operates, the counter reading is 100.
Subregister 5 states the number of times stage I
0
> has started, i.e. how many times
the set start current of the stage was exceeded, n(I
0
>) = 0...255.
8
Duration of the latest start situation of stage I
0
>>, expressed as a percentage of the
set operate time. The operation principle is the same as that of register 7.
Subregister 5 states the number of times stage I
0
>> has started, i.e. how many times
the set start current of the stage was exceeded, n(I>>) = 0...255.
9
Unbalance ratio
∆
I expressed as a percentage, i.e. the difference between the
minimum phase current and the maximum phase current. When the phase
discontinuity protection unit operates, the register is updated with the value at the
moment of operation. Then the values recorded previously will be pushed forwards
one step in the memory stack while the oldest value is lost. The last five current values
recorded are available in the memory stack.
11
Continuous 15 min maximum demand current, updated once a minute.
Submenu 1 contains the highest maximum demand current value recorded after the
last relay reset.
0
Display of external blocking and control signals.
The right-most digit indicates the status of the external control signals of the relay
module as follows:
Displayed
Activated signal
figure
BS1
BS2
RRES
(BS3)
0
1
x
2
x
3
x
x
4
x
5
x
x
6
x
x
7
x
x
x
The functions of the external control signals are defined with the switches of
switchgroups SGB1...3.
Summary of Contents for SPAA 341 C /E351
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