ABB 615 Series ANSI, Техническое руководство, Страница: 493 / 713

Section 7
1MAC050144-MB C
Control functions
486 615 series ANSI
Technical Manual
signals from the protection signals. The Control line setting is a bit mask, that is, the lowest
bit controls the
INIT_1
line and the highest bit the
INIT_6
line. Some example
combinations of the Control line setting are as follows:
Table 419: Control line setting definition
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).
7.2.3.2 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.
7.2.3.3 Master and slave scheme
With the co-operation between the AR units in the same IED or between IEDs, the user
can achieve sequential reclosings of two breakers at a line end in a 1½-breaker, double
breaker or ring-bus arrangement. One unit is defined as a master and it executes the
reclosing first. If the reclosing is successful and no trip takes place, the second unit, that is
the slave, is released to complete the reclose shot. With persistent faults, the breaker
reclosing is limited to the first breaker.
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