Reverse Power/Directional Overpower Protection Doppdpr - ABB RELION REX640 Technical Manual

Section 4
Protection functions
4.8.2
4.8.2.1
4.8.2.2
4.8.2.3
960
Characteristic
Reset ratio
Operate time accuracy
Suppression of harmonics
Measurement mode = "Pos Seq" (default)
1)
2) U = U , f = 50 Hz, results based on statistical distribution of 1000 measurements
n n
3) Includes the delay of the signal output contact

Reverse power/directional overpower protection DOPPDPR

Identification
Function description
Reverse power/directional overpower
protection
Function block
GUID-9F24E3E4-7F02-4DB3-9E06-0FFA409FB037 V1 EN
Figure 519: Function block
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 customer is supplying power
into the grid and for protecting the transformer from delivering an excessive load.
The function starts and operates when the measured power exceeds the set limit and
in a specified direction. The operate time characteristics are according to definite time
(DT).
This function contains a blocking functionality. It is possible to block the function
outputs, timer or the function itself.
Value
Typically 1.04
±1.0% of the set value of ±20 ms
-50 dB at f = n × f , where n = 2, 3, 4, 5,...
n
IEC 61850 IEC 60617
identification identification
DOPPDPR P>/Q>
1MRS759142 C
ANSI/IEE C37.2
device number
32R/32O
REX640
Technical Manual