ABB RELION REB500 Technical Manual page 159

1MRK 505 406-UEN B
Main protection 1, AR 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
Main protection 2, 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
IEC19000462 V1 EN-US
Figure 58: 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
Bay protection functions REB500
Technical manual
time < t Oper.
t Discrim. 1P
t Dead1 1P
equipped with an autoreclosure function — Main protection 1 in operation >>
Response for unsuccessful autoreclosure
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(because main protection 1 ready)
18000057-IEC19000462-1-en.vsdx
Section 5
Bay protection functions
153