ABB 615 Series ANSI, Техническое руководство

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Section 4
1MAC050144-MB C
Protection functions
210 615 series ANSI
Technical Manual
4.1.9.10 Technical data
Table 198: 46M Technical data
4.1.10 Phase reversal protection, 46R
4.1.10.1 Identification
4.1.10.2 Function block
Figure 97: Function block
4.1.10.3 Functionality
The phase-reversal protection 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
values during the motor startup. The excessive I
2
values are caused by incorrectly
connected phases, which in turn makes the motor rotate in the opposite direction.
The function contains a blocking functionality. It is possible to block function outputs,
timer or the function itself, if desired.
Pickup accuracy Depending on the frequency of the current
measured: f
n
±2Hz
±1.5% of the set value or ±0.002 x I
n
Pickup time
12
1. Negative sequence current before fault = 0.0, f
n
= 60 Hz, results based on statistical distribution of 1000
measurements
2. Includes the delay of the signal output contact
Minimum Typical Maximum
I
Fault
= 2.0 x set Pickup value 22 ms 24 ms 25 ms
Reset time < 40 ms
Reset ratio Typical 0.96
Retardation time < 35 ms
Trip time accuracy in definite time mode ±1.0% of the set value or ±20 ms
Trip time accuracy in inverse time mode
±5.0% of the theoretical value or ±20 ms
3
3. Pickup value multiples in range of 1.10 to 5.00
Suppression of harmonics DFT: -50dB at f = n x f
n
, where n = 2, 3, 4, 5,…
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Phase reversal protection PREVPTOC I2>> 46R