Pulsar TCF-10B, Системное руководство, Страница: 196 / 249

16
Chapter 16. Receiver Logic Module
April 1997 Page 16–13
FUNCTION SW2-3
NOISE ALLOWS UB TRIP OPEN
NOISE BLOCKS UB TRIP CLOSED
Table 16–13. Noise Block of Unblock Switch
Settings for POTT/UB 3F Applications.
TIME IN ms SW2-4 SW2-5
OFF OPEN OPEN
ON W/O OVER CLOSED OPEN
ON W OVER OPEN CLOSED
NOT USED CLOSED CLOSED
Table 16–14. Guard Before Trip Switch Settings
for POTT/UB 3F Applications.
TIME IN ms SW3-7 SW3-8
DISABLED OPEN OPEN
50 CLOSED OPEN
75 OPEN CLOSED
100 CLOSED CLOSED
Table 16–15. Low Level Delay Switch Settings
for POTT/UB 3F Applications.
Guard before Trip
(POTT/UB 3F)
With this function set to “on without
override”, the logic requires guard to
be received for 120 ms before the
system is allowed to trip. With it set to
“on with override”, the 120 ms guard
return is required except where trip
has been received for over 1,000 ms;
if there is a loss of channel, then the
guard is not required prior to tripping.
Typically, you would use this where
open breaker keying is required.
The guard before trip time switch
settings are listed in Table 16-14.
Noise Block of Unblock
(POTT/UB 3F)
With this switch (SW2-3) closed,
noise will disable the Unblock trip
window. Normal application is with
this switch opened.
The noise block of unblock switch
settings are listed in Table 16-13.
Low Level Delay Timer
(POTT/UB 3F)
The Low Level Delay Timer delays
the Unblock timer from initiating a
trip window on loss of channel; it also
delays the low level output. You can
set it for 50, 75, or 100 ms or disable
(0 ms) it.
The low level delay time switch
settings are listed in Table 16-15.
Position
when
shipped
NOTE:
Your Receiver Logic Module is shipped to you with SW3-6 set to the CLOSED position. This is
currently the only active setting for this switch, so be sure to leave it in the CLOSED position.