Checking The Dead Times - ABB RELION REB500 Technical Manual

Section 5
Bay protection functions
Main protection 1 not ready
Trip CB
Trip CB 3P
Start
Def. Trip
Close CB
ZExtension
First AR 1P
Trip 3- Pol
AR in Prog.
AR Ready
AR Blocked
Trip CB
Trip CB 3P
Start
Def. Trip
Close CB
ZExtension
First AR 1P
Trip 3- Pol
AR in Prog.
AR Ready
AR Blocked
IEC19000463 V1 EN-US
Figure 59: Timing diagram for scheme with main protections 1 and 2 (REB500sys), both
Settings:
• 1. AR Mode = 1P-1P or 1P3P-1P3P,
• 2..4. AR Mode = off
• Zextension = on
• ZE 1. AR = off
5.8.8

Checking the dead times

When commissioning the autoreclosure function, it is not sufficient to check the combined
operation of protection function, autoreclosure function and circuit-breaker, the resulting
dead times must also be determined.
154
Main protection 2, AR active
time < t Oper.
t Discrim. 1P
t Dead1 1P
equipped with an autoreclosure function — Main protection 1 not in operation
>> Response for unsuccessful autoreclosure
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( because main protection 1 not ready)
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Bay protection functions REB500
Technical manual