doble TDR9000, User Manual, Page: 273 / 454

TDR9000
™
Circuit Breaker Test System User’s Guide
72A-1898 Rev. A 11/01 A-73
Monday
, November 26, 2001 1:09 pm
Main Contact
Timing – Reclose Parameters include:
Minimum The minimum time from trip initiation to Main
Contact make
Maximum The maximum time from trip initiation to Main
Contact make.
Figure A.85 shows how contact timing occurs on a module-by-module
level.
Module (A) The maximum allowable difference in time
between the Trip initiation and the closing of the
two Main Contacts in any module.
Phase (B) The maximum allowable difference in time
between the Trip initiation and the closing of any
two Main Contacts in any phase.
Breaker (C) The maximum allowable difference in time
between the Trip initiation and the closing of any
two Main Contacts in a circuit breaker.
Figure A.85 Main Contact Timing – Reclose
Module #1
Module #1
Module #2
Module #1
Module #2
Module #2
#!
#2
#3
#4
#!
#2
#3
#4
Contact #1
Contact #2
Contact #3
Contact #4
Main Contact reopening time
C
0
A
0
C
0 20 40 60 80
Time (ms)
First Switch to Last Switch
B
A
0
B