4-16
BE1-51/27R - Installation
Feeder
BE1-51 (51)
(Breaker F)
0.5 to 12 A
Very inverse timing
800/5 CTs
No instantaneous
Pickup set to 6 A
Time Dial set to 08
Phase Directional
BE1-67, (67)
Breaker L)
Definite timing (B3)
0.5 to 12 A
3000/5 CTs
Pickup set to 0.5 A
Time Dial set to 02
Generator Reactance
Subtransient
0.18
(Per Unit)
Transient
0.25
Steady state
1.5
Figure 4-16. Setting Example
Downstream current in Table 4-1 is the current in the downstream relay with which the BE1-51/27R elements
must coordinate. The currents are the changes resulting from the fault assuming a driving point voltage of 11
kV. Actual currents will be the sum of the table values plus the pre-fault load currents. Transient level currents
are based on use of the generator transient reactance. Steady-state level currents are based on use of
generator steady-state reactance and assuming no generator regulator boost. Note that the table values apply
for 3-phase faults. Transient level currents in generators for a phase-to-phase fault will be about equal to the
3-phase current values. Steady-state level currents in the generators will be higher for a phase-to-phase fault.
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...