Characteristic
Value
Reset ratio
Typically 0.96
Retardation time
<35 ms
Trip time accuracy in definite time mode
±1.0% of the set value or ±20 ms
Suppression of harmonics
DFT: -50 dB at f = n × f
n
, where n = 2, 3, 4, 5,…
4.4.2.10
Technical revision history
Table 494:
46PD Technical revision history
Technical revision
Change
B
Internal improvement
C
Internal improvement
D
Internal improvement
4.4.3
Phase reversal protection 46R
4.4.3.1
Identification
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Phase reversal protection
PREVPTOC
I2>>
46R
4.4.3.2
Function block
PICKUP
I
2
46R
TRIP
BLOCK
GUID-79DAF62E-ACEA-438B-AC8A-D355CB3D1CA5 V1 EN
Figure 303:
Function block
4.4.3.3
Functionality
The phase reversal protection function 46R is used to detect the reversed connection of the
phases to a three-phase motor by monitoring the negative phase sequence current I
2
of the
motor.
46R picks up and trips when I
2
exceeds the set limit. 46R operates on definite time (DT)
characteristics. 46R is based on the calculated I
2
, and the function detects too high I
2
1MAC059074-MB A
Section 4
Protection functions
615 series ANSI
599
Technical Manual
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