ABB 615 Series - Zone Coordination

Table 903: Control line setting definition
Control line
setting
INIT_1 INIT_2
DEL_INIT_2
INIT_3
DEL_INIT_3
INIT_4
DEL_INIT_4
INIT_5 INIT_6
0 other other other other other other
1 prot other other other other other
2 other prot other other other other
3 prot prot other other other other
4 other other prot other other other
5 prot other prot other other other
...63 prot prot prot prot prot prot
prot = protection signal
other = non-protection signal
When the corresponding bit or bits in both the Control line setting and the INIT_X line
are TRUE:
• The CLOSE_CB output is blocked until the protection is reset
• If the INIT_X line defined as the protection signal is activated during the
discrimination time, the AR function goes to lockout
• If the INIT_X line defined as the protection signal stays active longer than the time
set by the Max trip time setting, the AR function goes to lockout (long trip)
• The UNSUC_RECL output is activated after a pre-defined two minutes (alarming
ground-fault).
9.4.3.2 Zone coordination
Zone coordination is used in the zone sequence between local protection units and
downstream devices. At the falling edge of the INC_SHOTP line, the value of the shot
pointer is increased by one, unless a shot is in progress or the shot pointer already has the
maximum value.
The falling edge of the INC_SHOTP line is not accepted if any of the shots are in progress.
9.4.3.3 Master and slave scheme
With the cooperation between the AR units in the same protection relay or between
protection relays, sequential reclosings of two breakers at a line end in a 1½-breaker,
double breaker or ring-bus arrangement can be achieved. One unit is defined as a master
and it executes the reclosing first. If the reclosing is successful and no trip takes place, the
1MAC059074-MB A Section 9
Control functions
615 series ANSI 993
Technical Manual