The auxiliary tripping relays K1...K8 are controlled by the 216DB61 binary I/P and tripping unit. shows the basic control circuit for the tripping relays.
K1...K8 : tripping relays; rated coil voltage 12 V DC
1) : wiring of the tripping contacts according to Table 12.3
2) : surge circuit for accelerating K1...K8
Mx : diode matrix tripping logic for direct tripping (O/P's A09, A10 not used)
The relationship between the tripping relays and the numbering of the tripping channels is:
