ABB Relion 670 series - Page 685

ABB Relion 670 series

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en05000835_ansi.vsd

RESTORE

Voltage

PICKUP

PICKUP

TRIP

Pickup

&

Trip

Output

Logic

BLOCK

Frequency

100 ms

Comparator

If

[PickupFreqGrad<0

AND

df/dt < PickupFreqGrad]

OR

[PickupFreqGrad>0

AND

df/dt > PickupFreqGrad]

Then

PICKUP

Comparator

V < IntBlockLevel

Comparator

f > RestoreFreq

OR

Time integrator

Definite Time Delay

TimeDlyOperate

TimeDlyReset

TimeDlyRestore

BLKDMAGN

Rate-of-Change

of Frequency

BLOCK

BLKTRIP

BLKRESET

ANSI05000835 V1 EN-US

Figure 367: Simplified logic diagram for SAPFRC (81)

10.3.8 Technical data

M14976-1 v10

Table 396: SAPFRC (81) Technical data

Function Range or value Accuracy

Trip value, pickup function (-10.00-10.00) Hz/s ±10.0 mHz/s

Trip value, restore enable frequency (45.00-65.00) Hz ±2.0 mHz

Definite restore time delay (0.000-60.000) s ±0.2% or ±100 ms whichever is

greater

Definite time delay for frequency gradient trip (0.000-60.000) s ±0.2% or ±120 ms whichever is

greater

Definite reset time delay (0.000-60.000) s ±0.2% or ±250 ms whichever is

greater

1MRK 502 066-UUS B Section 10

Frequency protection

679

Technical manual

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