ABB Relion 670 Series Technical Reference Manual page 249

1MRK 505 208-UEN B
Technical reference manual
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IEC10000100 V1 EN
Figure 122: Detailed logic diagram for step 1, DT operation
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START
TRIP
tResetn
tn
IEC10000039 V1 EN
Figure 123: Example for Definite Time Delay stage rest
tReset1 t1
t t
OFF ON
Delay Delay
Section 7
Voltage protection
ST1
TR1
AND
IEC10000100-1-en.vsd
IEC10000039-1-en.vsd
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