Section 4
1MAC050144-MB C
Protection functions
126
615 series ANSI
Technical Manual
Figure 52:
Pickup value behavior with ENA_MULT input activated
Phase selection logic
If the fault criteria are fulfilled in the level detector, the phase selection logic detects the
phase or phases in which the measured current exceeds the setting. If the phase information
matches the
Num of pickup phases
setting, the phase selection logic activates the timer
module.
Timer
Once activated, the timer activates the
PICKUP
output. Depending on the value of the
Operating curve type
setting, the time characteristics are according to DT or IDMT. When
the operation timer has reached the value of
Trip delay time
in the DT mode or the
maximum value defined by the inverse time curve, the
TRIP
output is activated.
Blocking logic
There are three operation modes in the blocking functionality. The operation modes are
controlled by the
BLOCK
input and the global setting
"Configuration/System/
Blocking
mode
"
which selects the blocking mode. The
BLOCK
input can be controlled by a binary
input, a horizontal communication input or an internal signal of the IED program. The
influence of the
BLOCK
signal activation is preselected with the global setting
Blocking
mode
.
The
Blocking mode
setting has three blocking methods. In the "Freeze timers" mode, the
trip timer is frozen to the prevailing value. In the "Block all" mode, the whole function is
Summary of Contents for 615 Series ANSI
Page 1: ...Relion Protection and Control 615 series ANSI Technical Manual ...
Page 2: ......
Page 29: ...1MAC050144 MB C Section 615 series ANSI 22 Technical Manual ...
Page 389: ...Section 4 1MAC050144 MB C Protection functions 382 615 series ANSI Technical Manual ...
Page 485: ...Section 6 1MAC050144 MB C Supervision functions 478 615 series ANSI Technical Manual ...
Page 635: ...Section 10 1MAC050144 MB C Other functions 628 615 series ANSI Technical Manual ...
Page 711: ...Section 16 1MAC050144 MB C Glossary 704 615 series ANSI Technical Manual ...
Page 712: ......