ABB RELION 620 Series Technical Manual page 383

1MRS757644 F
620 series
Technical Manual
Table 402: Monitored data values
Monitored data values
FAULT_DIR
DIRECTION
ANGLE
ANGLE_RCA
I_OPER
Monitored data values are accessible on the LHMI or through tools via
communications.
Timer
Once activated, the timer activates the START output. Depending on the value of the
Operating curve type setting, the time characteristics are according to DT or IDMT.
When the operation timer has reached the value of Operate delay time in the DT mode
or the maximum value defined by the inverse time curve, the OPERATE output is
activated.
When the user-programmable IDMT curve is selected, the operation time
characteristics are defined by the parameters Curve parameter A, Curve parameter B,
Curve parameter C, Curve parameter D and Curve parameter E.
If a drop-off situation happens, that is, a fault suddenly disappears before the operate
delay is exceeded, the timer reset state is activated. The functionality of the timer in
the reset state depends on the combination of the Operating curve type, Type of reset
curve and Reset delay time settings. When the DT characteristic is selected, the reset
timer runs until the set Reset delay time value is exceeded. When the IDMT curves are
selected, the Type of reset curve setting can be set to "Immediate", "Def time reset" or
"Inverse reset". The reset curve type "Immediate" causes an immediate reset. With the
reset curve type "Def time reset", the reset time depends on the Reset delay time
setting. With the reset curve type "Inverse reset", the reset time depends on the current
during the drop-off situation. The START output is deactivated when the reset timer
has elapsed.
The "Inverse reset" selection is only supported with ANSI or user
programmable types of the IDMT operating curves. If another
Protection functions
Description
The detected direction of fault during fault
situations, that is, when START output is active.
The momentary operating direction indication
output.
Also called operating angle, shows the angle
difference between the polarizing quantity (Uo,
U ) and operating quantity (Io, I
2
The angle difference between the operating angle
and Characteristic angle , that is, ANGLE_RCA =
Characteristic angle .
ANGLE –
The current that is used for fault detection. If the
Operation mode setting is "Phase angle", "Phase
angle 80" or "Phase angle 88", I_OPER is the
measured or calculated residual current. If the
Operation mode setting is "IoSin", I_OPER is
calculated as follows I_OPER = Io x sin(ANGLE).
Operation mode setting is "IoCos", I_OPER
If the
is calculated as follows I_OPER = Io x
cos(ANGLE).
Section 4
).
2
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