Technical Data - ABB RES670 Technical Manual

Section 8
Current protection
8.6.8
8.7
8.7.1
8.7.2
260

Technical data

Table 139: GUPPDUP (37) technical data
Function
Power level
for Step 1 and Step 2
Characteristic angle
for Step 1 and Step 2
Independent time delay to trip for Step 1 and
Step 2 at 2 x S to 0.5 x S and
n n
Directional overpower protection GOPPDOP (32)
Identification
Function description
Directional overpower protection
Functionality
The task of a generator in a power plant is to convert mechanical energy available as a
torque on a rotating shaft to electric energy.
Sometimes, the mechanical power from a prime mover may decrease so much that it
does not cover bearing losses and ventilation losses. Then, the synchronous generator
becomes a synchronous motor and starts to take electric power from the rest of the
power system. This operating state, where individual synchronous machines operate as
motors, implies no risk for the machine itself. If the generator under consideration is
very large and if it consumes lots of electric power, it may be desirable to disconnect it
to ease the task for the rest of the power system.
Range or value
(0.0–500.0)% of
(-180.0–180.0) degrees
(0.01-6000.00) s
k = 0.000
IEC 61850 IEC 60617
identification identification
GOPPDOP
1MRK 511 408-UUS A
Accuracy
SBase
±1.0% of S
n
±1.0% of S at S > S
where
S = 1,732*V
r n
±2.0 degrees
±0.2% or ±40 ms
whichever is greater
ANSI/IEEE C37.2
device number
32
P >
2
DOCUMENT172362-IMG158942 V2 EN-US
Phasor measurement unit RES670 2.2 ANSI
Technical manual
SEMOD175153-1 v1
SEMOD175152-2 v11
at S ≤ S
n
n
*I
n
SEMOD172360-1 v4
SEMOD176574-2 v4
SEMOD172356-4 v5