Table of Contents
Advertisement
7
Neutral overcurrent I
earth-fault stage starts or performs a tripping, the current value at the moment of tripping is stored
in a memory stack. A new tripping moves the old value up one place in the stack and adds a new value
to the stack. At a maximum five values are memorized - if a sixth starting occurs, the oldest value will
be lost.
8
Duration of the latest starting situation of stage I
starting resets the counter, which then starts counting from zero and moves the old value up in the
memory stack. At a maximum five values are memorized - if a sixth starting occurs the oldest value
will be lost. When the concerned stage has tripped, the counter reading is 100. // Number of startings
of the low-set neutral overcurrent stage I
9
Duration of the latest starting situation of stage Io» as a percentage of the set operating time to>>. A
new starting resets the counter, which then starts counting from zero and moves the old value up in
the memory stack. At a maximum five values are memorized - if a sixth starting occurs, the oldest
value will be lost. When the concerned stage has tripped, the counter reading is 100. // Number of
startings of the high-set neutral overcurrent stage I
0
Display of blocking signals and other external control signals.
The right-most digit indicates the state of the blocking input of the unit. The following states may be
indicated:
The effect of the signal on the unit is determined by the setting of switchgroup SGB
From this register "0" it is possible to move on to the TEST mode, where the starting and tripping
signals of the module are activated one by one. For further details see the description "General
characteristics of D-type SPC relay units".
A
The address code of the measuring relay module, required by the serial communication system. The
address code is set at zero unless the serial communication system is used.
The submenus of this register comprise the selection of the data transfer rate of the serial communi-
cation, a bus traffic monitor indicating the operating state of the serial communication system, a
password required for the remote control of the settings and a status information for the main / second
setting bank, and finally the setting of time delay for the circuit breaker failure protection.
If the module is connected to a system including the control data communicator type SACO 148D4 and
if the communication system is operating, the counter reading of the bus traffic monitor will be zero.
Otherwise the numbers 0...255 are continuously rolling in the counter. The password given in the
setting mode of the next submenu step must always be entered via the serial communication before
settings can be remotely altered. With the setting selector status in the fourth submenu either the main
setting bank or the second setting bank can be made active.
-
Display dark. By pressing the STEP push-button the beginning of the display sequence is re-entered.
The registers 1...9 are set to zero by pressing the push-buttons RESET and PROGRAM simultane-
ously. The registers are also cleared if the auxiliary power supply of the module is interrupted. The
address code of the plug-in module, the data transfer rate of the serial communication, the password
and the status of the main/second setting bank switch are not erased by a voltage failure. The
instructions for setting the address and the data transfer rate are described in the "General
characteristics of D-type SPC relay units".
PAINOS
PAINOS
measured as a per cent of the rated current of the earth-fault protection. If the
o
0 = no blocking signal
1 = the blocking or control signal BS is active.
> as a percentage of the set operating time t
o
>, n (I
>) = 0...255.
o
o
>>, n (I
>>) = 0...255.
o
o
13
> . A new
o
Hide quick links:
Advertisement
Chapters
Table of Contents
