particular rotation direction, the reversed rotation direction can lead to an inefficient
cooling of the motor due to the fan design.
In a motor, the value of the negative-sequence component of the phase currents is very
negligible when compared to the positive-sequence component of the current during a
healthy operating condition of the motor. But when the motor is started with the phase
connections in the reverse order, the magnitude of I
2
is very high. So whenever the value
of I
2
exceeds the pickup value, the function detects the reverse rotation direction and
provides an operating signal that disconnects the motor from the supply.
4.4.3.6 Signals
Table 495: 46R Input signals
Name Type Default Description
I
2
SIGNAL 0 Negative sequence current
BLOCK BOOLEAN 0=False Block signal for activating the blocking mode
Table 496: 46R Output signals
Name Type Description
TRIP BOOLEAN Trip
PICKUP BOOLEAN Pickup
4.4.3.7 Settings
Table 497: 46R Group settings (Basic)
Parameter
Values (Range) Unit Step Default Description
Pickup value 0.05...1.00 xIn 0.01 0.75 Pickup value
Trip delay time 100...60000 ms 10 100 Trip delay time
Table 498: 46R Non group settings (Basic)
Parameter
Values (Range) Unit Step Default Description
Operation 1=enable
5=disable
1=enable Operation Disable / Enable
1MAC059074-MB A Section 4
Protection functions
615 series ANSI 601
Technical Manual
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