ABB REC650 ANSI, Руководство по применению

Страница: 209 / 370

received and sealed-in. The output READY is reset (set to false). Output ACTIVE is set.
The timer for 3-phase auto-reclosing open time is started.
While any of the auto-reclosing open time timers are running, the output INPROGR is
activated. When the "open reset" timer runs out, the respective internal signal is
transmitted to the output module for further checks and to issue a closing command to the
circuit breaker.
When issuing a CB closing command a “reset” timer tReset is started. If no tripping takes
place during that time the auto-reclosing function resets to the “Ready” state and the signal
ACTIVE resets. If the first reclosing shot fails, 2nd to 5th reclosing shots will follow, if
selected.
10.2.2.9 Reclosing reset timer
The reset timer tReset defines the time it takes from issue of the reclosing command, until
the reclosing function resets. Should a new trip occur during this time, it is treated as a
continuation of the first fault. The reclaim timer is started when the CB closing command
is given.
10.2.2.10 Transient fault
After the Reclosing command the reset timer keeps running for the set time. If no tripping
occurs within this time,
tReset , the Auto-Reclosing will reset. The CB remains closed and
the operating gear recharges. The input signals 52a and CBREADY will be set
10.2.2.11 Permanent fault and reclosing unsuccessful signal
If a new trip occurs, and a new input signal RI or TRSOTF appears, after the CB closing
command, the output UNSUCCL (unsuccessful closing) is set high. The timer for the first
shot can no longer be started. Depending on the set number of Reclosing shots further
shots may be made or the Reclosing sequence is ended. After reset timer time-out the
Auto-Reclosing function resets, but the CB remains open. The “CB closed” information
through the input 52a is missing. Thus, the reclosing function is not ready for a new
reclosing cycle.
Normally, the signal UNSUCCL appears when a new trip and start is received after the last
reclosing shot has been made and the auto-reclosing function is blocked. The signal resets
after reset time. The “unsuccessful” signal can also be made to depend on CB position
input. The parameter
UnsucClByCBChk should then be set to CBCheck , and a timer
tUnsucCl should be set too. If the CB does not respond to the closing command and does
not close, but remains open, the output UNSUCCL is set high after time tUnsucCl . The
Unsuccessful output can for example, be used in Multi-Breaker arrangement to cancel the
auto-reclosing function for the second breaker, if the first breaker closed onto a persistent
1MRK 511 286-UUS A
Section 10
Control
203
Application manual