Schweitzer Engineering Laboratories SEL-351A - Applications; Figure 1.1 SEL-351 A Relays Applied Throughout the Power System

1.6
SEL-351A Relay Instruction Manual Date Code 20080213
Introduction and Specifications
Applications
Applications
q See Figure 2.14 and Figure 2.15; w see Figure 2.16 and Figure 2.17; e see Figure 2.13; r see Figure 2.12 and
Figure 2.20–Figure 2.24; t see Figure 2.18.
Figure 1.1 SEL-351A Relays Applied Throughout the Power System
Transformer Bank
Protection
w
Transmission
Line Protection
and Reclosing
q
Line Recloser
Installations
Core-Balance
Current Transformer
N
N
Trip
ABC
ABC
Distribution Bus
Fast Bus Trip Scheme
The SEL-351R Recloser Control is a similar product to
the SEL-351A. The SEL-351R is powered by 120 Vac and is
ideally suited for applications outside the substation.
Utility Distribution Feeder
Protection and Reclosing
r
Industrial Distribution
Feeder Protection
t
52
Trip and
Close
ABC
ABC
ABC
Transmission Bus
Trip
Trip
Distribution Bus
Protection
e
Line
Recloser
52
52
52
52
Trip and
Close
SEL-351A
SEL-351A
SEL-351A
SEL-351A
SEL-351R
SEL-351A
Courtesy of NationalSwitchgear.com