5-2 Trip and Target Logic Date Code 990215
SEL-351P Manual Técnico
range for this timer is 4 - 16,000 cycles. See Figure SECTION 5: .2.
More than one trip setting (or all four trip settings TRCOMM, DTT, TRSOTF, and TR) can be
set. For example, in a communications-assisted trip scheme, TRCOMM is set with direction
forward overreaching Level 2 overcurrent elements, TR is set with direction forward
underreaching Level 1 overcurrent elements and other time delayed elements (e.g., Level 2
definite-time overcurrent elements), and TRSOTF is set with nondirectional overcurrent
elements.
Figure SECTION 5: .1: Trip Logic
The TRIP Relay Word bit output of the trip logic in
Figure SECTION 5: .1 propagates to the
final trip/close logic in Figure 7.29 . The logic in Figure 7.29 controls dedicated trip and close
output contacts and prevents the trip and close output contacts from being asserted at the same
time.
To Next Page
Loading...