9.4.3.1 Protection signal definition
The Control line setting defines which of the initiation signals are protection start
and trip signals and which are not. With this setting, the user can distinguish the
blocking 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 616: 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 earth-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.
1YHT530004D05 D Section 9
Control functions
615 series 693
Technical Manual
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