Io
Op general
Uo
t
Timer
Str general
Directional
calculation
Str dirGeneral
Level
detector
GUID-0D426ECF-B058-45BB-8B5D-CF16C170BEB4 V1 EN
Figure 58:
Functional module diagram
Level detector
The magnitude of the operating quantity is compared with the
Start value
setting and
the magnitude of the polarizing quantity is compared with the
Voltage start value
. If
both limits are exceeded, the Level detector sends an enabling signal to the timer
module.
The direct measured residual current or calculated residual current can be used for
fault detection. The selection can be set with
Io signal Sel
available in the general
parameter setting.
The
Abs Hyst Oper Qty
and
Abs Hyst Pol Qty
settings can be used for preventing
unnecessary oscillations in
STR GENERAL
and
OP GENERAL
output if the
operating and/or polarizing quantity is slightly above or below the
Start value
setting.
After leaving the hysteresis area, the start condition has to be fulfilled again and if it
is not sufficient, the signal returns to the hysteresis area.
Directional calculation
The directional calculation module monitors the angle between the polarizing
quantity and operating quantity. When the angle is in the operation sector, the module
sends the enabling signal to the timer module.
The minimum signal level which allows the directional operation is fixed to
Min
operate current
as 1 A and
Min operate voltage
as 500 V.
The convention used in the phasor diagrams representing the operation of DEFPTOC
is reversed, that is, the polarizing quantity Uo in the phasor diagrams is -Uo.
For defining the operation sector, there are three modes available through the
Operation mode
setting.
1MRS757488 H
Section 6
Commissioning
RIO600
103
Installation and Commissioning Manual
Summary of Contents for Remote I/O RIO600
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