Technical Data - ABB RES670 Technical Manual

Section 10
Frequency protection
10.3.7
10.4
10.4.1
10.4.2
318

Technical data

Table 176: SAPFRC (81) Technical data
Function
Trip value, pickup function
Trip value, restore enable
frequency
Definite restore time delay
Definite time delay for frequency
gradient trip
Definite reset time delay
Frequency time accumulation protection function
FTAQFVR (81A)
Identification
Function description
Frequency time accumulation
protection
Functionality
Frequency time accumulation protection (FTAQFVR (81A)) is based on measured
system frequency and time counters. FTAQFVR (81A) for generator protection
provides the BFI_3P output for a particular settable frequency limit, when the system
frequency falls in that settable frequency band limit and positive sequence voltage
within settable voltage band limit. The BFI_3P signal triggers the individual event
timer, which is the continuous time spent within the given frequency band, and the
accumulation timer, which is the cumulative time spent within the given frequency
band. Once the timers reach their limit, an alarm or trip signal is activated to protect the
turbine against the abnormal frequency operation. This function is blocked during
generator start-up or shut down conditions by monitoring the circuit breaker position
and current threshold value. The function is also blocked when the system positive
sequence voltage magnitude deviates from the given voltage band limit which can be
enabled by EnaVoltCheck setting.
Range or value
(-10.00-10.00) Hz/s
(45.00-65.00) Hz
(0.000-60.000) s
(0.200-60.000) s
(0.000-60.000) s
IEC 61850 IEC 60617
identification identification
FTAQFVR
Phasor measurement unit RES670 2.2 ANSI
1MRK 511 408-UUS A
Accuracy
±10.0 mHz/s
±2.0 mHz
±0.2% or ±100 ms whichever is
greater
±0.2% or ±120 ms whichever is
greater
±0.2% or ±250 ms whichever is
greater
GUID-124A1F91-44C0-4DB6-8603-CC8CA19AE2A6 v3
GUID-87605DA0-EAA6-4A6C-BF03-7FDB187E1B29 v2
ANSI/
IEEEidentification
f<> 81A
GUID-020CE8CF-9BEA-455D-ACBD-13023B93B4D1 v5
Technical manual
M14976-1 v9