ABB Relion 620 Series - Reverse Power-Directional Overpower Protection DOPPDPR

4.8.1.9 Technical data
Table 698: DUPPDPR Technical data
Characteristic Value
Operation accuracy Depending on the frequency of the measured current and
voltage:
f
n
±2 Hz
Power measurement accuracy ±3% of the set value or ±0.002
× S
n
Phase angle: ±2°
Start time , Typically 45 ms
Reset time Typically 30 ms
Reset ratio Typically 1.04
Operate time accuracy ±1.0% of the set value of ±20 ms
Suppression of harmonics -50 dB at f = n × f
n
, where n = 2, 3, 4, 5,…
4.8.2 Reverse power-directional overpower protection
DOPPDPR
4.8.2.1 Identification
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Reverse power/directional over-
power protection
DOPPDPR P>/Q> 32R/32O
4.8.2.2 Function block
Figure 381: Function block
4.8.2.3 Functionality
The reverse power/directional overpower protection function DOPPDPR can be
used for generator protection against delivering an excessive power beyond the
generator's capacity to the grid, against the generator running like a motor, and
against the motor running like a generator and for protecting a motor which
consumes more reactive power due to loss of field. It can also be used in feeder
protection for indicating overload on the distribution system, to indicate that a
1
Measurement mode = “Pos Seq” (default)
2
U = U
n
, f
n
= 50 Hz, results based on statistical distribution of 1000 measurements
3
Includes the delay of the signal output contact
1MRS757644 H Protection functions
620 series
Technical Manual
735