ABB RELION REX640 Technical Manual page 1055

1MRS759142 F
Characteristic
Reset ratio
Operate time accuracy
4.8 Power protection
4.8.1 Underpower protection DUPPDPR (ANSI 32U)
4.8.1.1 Identification
Function description
Underpower protection
4.8.1.2 Function block
Figure 589: Function block
4.8.1.3 Functionality
The underpower protection function DUPPDPR is used for protecting generators
and prime movers against the effects of very low power outputs or reverse power
condition.
The function operates when the measured active power falls below the set value.
The operating 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.
4.8.1.4 Analog channel configuration
DUPPDPR has two analog group inputs which must be properly configured.
1
Measured with static power output (SPO)
REX640
Technical Manual
1
IEC 61850
identification
DUPPDPR
Protection functions
Value
±3% of the set value or ±0.05 Ω
Phase angle: ±2°
Typically 0.96/1.04
±1.0% of the set value or 20 ms
IEC 60617
identification
P<
ANSI/IEEE C37.2
device number
32U
1055