Date Code 990430
Overcurrent, Voltage, Synchronism Check, and Frequency Elements
3-19
SEL-351P Manual Técnico
Accuracy
Pickup:
±
0.01 A secondary and
±
3% of setting (1 A nominal phase current inputs, IA, IB, IC)
Curve Timing:
±
1.50 cycles and
±
4% of curve time for currents between (and including)
2 and 30 multiples of pickup
Logic Outputs (51P1T element example)
The resultant logic outputs in Figure SECTION 3: .14 are the following Relay Word bits:
Table SECTION 3: .3: Phase Time-Overcurrent Element (maximum phase) Logic
Outputs
Relay Word Bit
Definition/ Indication
Application
51P1
Maximum phase current, I
P
, is
greater than phase time-
overcurrent element pickup
setting 51P1P.
Element pickup testing or other
control
applications. See
Trip
Logic
in
Section 5: Trip and
Target Logic
.
51P1T
Phase time-overcurrent element is
timed out on its curve.
Tripping and other control
applications. See
Trip Logic
in
Section 5: Trip and Target Logic
.
51P1R
Phase time-overcurrent element is
fully reset.
Element reset testing or other
control applications.
Torque Control Switch Operation (51P1T element example)
Torque Control Switch Closed
The pickup comparator in Figure SECTION 3: .14 compares the pickup setting (51P1P) to the
maximum phase current, I
P
, if the Torque Control Switch is closed. I
P
is also routed to the curve
timing/reset timing functions. The Relay Word Bits logic outputs operate as follows with the
Torque Control Switch closed:
51P1 = 1 (logical 1), if I
P
> pickup setting 51P1P and the phase time-overcurrent element
is timing or is timed out on its curve
= 0 (logical 0), if I
P
≤
pickup setting 51P1P
51P1T = 1 (logical 1), if I
P
> pickup setting 51P1P and the phase time-overcurrent element
is timed out on its curve
= 0 (logical 0), if I
P
> pickup setting 51P1P and the phase time-overcurrent element
is timing, but not yet timed out on its curve
= 0 (logical 0), if I
P
≤
pickup setting 51P1P
51P1R = 1 (logical 1), if I
P
≤
pickup setting 51P1P and the phase time-overcurrent element
is fully reset
= 0 (logical 0), if I
P
≤
pickup setting 51P1P and the phase time-overcurrent element
is timing to reset (not yet fully reset)
Содержание SEL-351P
Страница 6: ......
Страница 92: ......
Страница 96: ......
Страница 154: ......
Страница 156: ......
Страница 222: ......
Страница 258: ......
Страница 262: ......
Страница 278: ...5 16 Trip and Target Logic Date Code 990215 SEL 351P Manual Técnico Figure SECTION 5 6 POTT Logic ...
Страница 284: ...5 22 Trip and Target Logic Date Code 990215 SEL 351P Manual Técnico Figure SECTION 5 10 DCUB Logic ...
Страница 324: ......
Страница 368: ......
Страница 406: ......
Страница 482: ......
Страница 534: ......
Страница 539: ......
Страница 549: ......
Страница 551: ......
Страница 587: ......
Страница 597: ......
Страница 601: ......
Страница 603: ......
Страница 609: ......
Страница 621: ......
Страница 635: ......
Страница 649: ......
Страница 663: ...H 14 Distributed Network Protocol DNP V3 00 Date Code 991201 SEL 351P Manual Técnico Enter the new DNP Binary map CR ...
Страница 665: ......
Страница 671: ......