BE1-51/27R - Installation
4-19
Assuming that the 67 relays will not operate for fault 3, the generators will be unnecessarily tripped if the line
relaying fails to operate or if breaker R fails to interrupt the fault. Redundant line relaying will minimize the need
for generator tripping. Use of a breaker failure timer set at 0.25 seconds would avoid generator tripping for
failure of breaker R to interrupt.
NOTE 1:
194 a @ -31.8
(3700 kVA @
0.87 Power Factor)
Pre-Fault Load
Superimposed
Figure 4-17. Relay 51/27R Coordination With 67 Relay for Fault 3 In Figure 4-16
Содержание BE1-51/27R
Страница 14: ...BE1 51 27R General Information 1 9 Figure 1 1 Style Number Identification Chart...
Страница 36: ...BE1 51 27R General Information 1 31 Figure 1 38 Timing Type E7 BS 142 Extremely Inverse Drawing No 99 1097...
Страница 54: ...2 2 BE1 51 27R Human Machine Interface Controls And Indicators Figure 2 1 Location of Controls and Indicators...
Страница 59: ...3 2 BE1 51 27R Functional Description Figure 3 1 Functional Block Diagram...
Страница 69: ...BE1 51 27R Installation 4 7 Figure 4 8 Typical Internal Diagram Sensing Input Type M or N...
Страница 76: ...4 14 BE1 51 27R Installation Figure 4 14 Relay Signals and Current Pickup Example For 3 Phase Fault XE 0 65 X D...