Common Basler Electric Protective Relay Applications

Choose the purpose of your protection scheme:
   - Clear Faults
   - Relieve Stress
   - Restore Power
   - Preserve System

Choose the relay type and the zone you would like to protect on the chart below.

Purpose	Relay Type	Protected Zone
Clear Faults		Feeders	Transmission	Bus	Transformers	Generators	Motors	Intertie
	Current	11f, 50, 51, 50/51B&M, 700C, 851, 1051	11f, 67, 67N, 700C, 851, 1051	11f, CDS240, CDS220, 700C, 851, 1051	11t, CDS240, CDS220, 700C, 851, 1051, 50, 51	11g, 700C, 851, 1051, CDS240, 51/27R, 51/27C	11m, 51, 50/51, CDS240, CDS220, 700C, 851, 1051	11i, 1051
	Differential			11t, CDS240, CDS220, 87B	11t, 87T, CDS240, CDS220	11g, 87G, CDS240, CDS220	11m,87G, CDS240, CDS220
	Breaker Failure	11f, 700C, 851, 1051	11f, 50BF, BPR, 1051	11f, 1051, CDS240	11t, 1051, CDS240	11g,700C, 851, 1051, CDS240	11m,700C, 851, 1051, CDS240	11i, 1051
	Negative Sequence	11f, 700C, 851, 1051	11f, 1051	11f, 11t, CDS240, CDS220, 700C, 851, 1051	11t, CDS240, CDS220, 700C, 851, 1051	11g, CDS240, CDS220, 700C, 851, 1051, 46N	11m, CDS240, CDS220, 700C, 851, 1051, 47N, 46N,	11i, 1051
Purpose	Relay Type	Protected Zones
		Feeders	Transmission	Bus	Transformers	Generators	Motors	Intertie
Relieve Stress	Excitation				11t, 1051, CDS240	11g, CDS240, 40Q, 60	11m, CDS240, 40Q	11i, 1051
Relieve Stress	Voltage	11f, 27/59*, 700V, 1051	11f, 700V, 1051	11f, 59NC, 700V, 1051, CDS240	11t, 700V, 1051, CDS240	11g, 27, 59, 59N, 700V, 1051, CDS240	11m, 27, 27/59, 700V, 1051, CDS240	11i, 700V, 1051
Purpose	Relay Type	Protected Zones
		Feeders	Transmission	Bus	Transformers	Generators	Motors	Intertie
Restore Power	Sync	11f, 25*, 1051	11f, 25, 1051			11g, 25, 25A, 1051		11i
Restore Power	Multiple Shot Reclose	11f, 79A, 79M, 700C, 700V, 851, 1051	11f, 79A, 79M, 700V, 1051			11i, 700V		11i, 1051
Purpose	Relay Type	Protected Zone
		Feeders	Transmission	Bus	Transformers	Generators	Motors	Intertie
Preserve System	Power	11f, 32R*, 1051	11f, 1051	11f, 1051	11t, 1051	11g, 32R, 32O/U, 1051	11m, 32R, 32O/U, 1051	11i, 1051
Preserve System	Frequency	11f, 81O/U*, 700V, 1051	11f, 700V, 1051	11f, 700V, 1051, CDS240	11t, 700V, 1051, CDS240	11g, 81O/U, 700V, 1051, CDS240	11m, 700V, 1051, CDS240	11i, 700V, 1051

*=The use of this relay is suggested with distributed sources of generation.

For more information:

See the BE1 Numerical Relay Functions page
Download a reference sheet to the protective relay IEEE Device numbers