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Table 345:
Monitored data values
Monitored data values
Description
FAULT_DIR
The detected direction of fault during fault situations,
that is, when
PICKUP
output is active.
DIRECTION
The momentary operating direction indication
output.
ANGLE
ANGLE_RCA
The angle difference between the operating angle
and
Characteristic angle, that is, ANGLE_RCA =
ANGLE –
Characteristic angle.
I_OPER
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 = IG x sin(ANGLE). If
the
Operation mode setting is "IoCos", I_OPER is
calculated as follows I_OPER = IG x cos(ANGLE).
Monitored data values are accessible on the LHMI or through tools via communications.
Timer
Once activated, the timer activates the
PICKUP
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
Trip delay time
in the DT mode or the
maximum value defined by the inverse time curve, the
TRIP
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 trip 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
PICKUP
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 operating
1MAC059074-MB A
Section 4
Protection functions
615 series ANSI
331
Technical Manual
Содержание Relion 615 series
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