ABB RED650 - Page 449

b3= STL1 (startL1)
b4= FWL1 (forwardL1)
b5= REVL1 (reverseL1)
b6= STL2 (startL2)
b7= FWL2 (forwardL2)
b8= REVL2 (reverseL2)
b9= STL3 (startL3)
b10= FWL3 (forwardL3)
b11= REVL3 (reverseL3)
b12= STN (startN)
b13= FWN (forwardN)
b14= REVN (reverseN)
The StartMatrix function contains two function: the START criteria and the
DIRECTION criteria, see Figure
222.
The START criteria is to ensure that a forward and reverse signal shall come
together with a start signal to pass through the block. This is done individually for
each protection function connected to the StartMatrix via the STDIRX inputs, see
Figure 223.
All STDIROUT signals are then connected via an OR gate, see Figure
222.
The DIRECTION criteria allow either forward or reverse (phase-wise forward
FWLx or forward neutral FWN or phase-wise reverse REVLx or reverse neutral
REVN) to pass through to the general STDIR output. If both forward and reverse
are active phase-wise (e.g. REVLx=FWLx = True) or at neutral (e.g. FWN = REVN
= True) at the same time, none will be shown, see Figure
224.
1MRK 505 394-UEN A Section 14
Logic
Line differential protection RED650 2.2 IEC 443
Technical manual