GE Multilin F650 Instruction Manual page 366

10 APPLICATION EXAMPLES 10.2 EXAMPLE 2: TOC PROTECTION + RECLOSING SETTINGS PROCEDURE
The F650 trip contact over-travel is the time the contact remains closed for some definite time to assure the tripping action
of the breaker, specially in CB's with large tripping times (bulk or other CB's). This time delay has been set in group
SETPOINT ⇓ CONTROL ELEMENTS ⇒ INPUTS/OUTPUTS ⇒ BOARD F
To test the reclosing scheme one current and two voltages signals equipment with phase and frequency shifting capability
must be used. The current source must be switched OFF and ON in the time ranges described in the scheme
Example Nº 2
F650 Tripping and Reclosing Scheme
2 Shots followed by Permanent Fault
Hold time Hold time
2s -1st Shot time
1.7s 0.35s 1.7s 0.35s
t t
0.35s
1.7s reset reset
4s - 2nd Shot time
0.15s
0.2s
Figure 10–1:
10
GE Multilin F650 Digital Bay Controller 10-7