Schweitzer Engineering Laboratories SEL-351 - Hardware Connection Features; Figure 1.2: SEL-351 Relay Inputs, Outputs, and Communications Ports (Model 0351 Xt)

1-8 Introduction and Specifications Date Code 20001006
SEL-351 Instruction Manual
HARDWARE CONNECTION FEATURES
See subsection General Specifications later in this section and Section 2: Installation for more
information on hardware and connections.
Output Contacts:
If the output contacts are high-
current interrupting output
contacts, they are polarity
dependent. See Table 1.1 for
information on SEL-351 Relay
models with the high-current
interrupting output contact
option. See Output Contacts
in Section 2: Installation for
more information on the polar-
ity dependence of high-current
interrupting output contacts.
Channel IN:
For sensitive earth fault (SEF)
applications, the SEL-351
Relay should be ordered with
channel IN rated at 0.05 A
nominal. See item 3 at the
bottom of Figures 2.11 and
2.13 for additional reference
information.
Delta-Connected Voltages:
SEL-351 Relays ordered with
delta-connected voltage inputs
are configured internally as
shown below. See Figure 2.8
for an open-delta connection
example.
Figure 1.2: SEL-351 Relay Inputs, Outputs, and Communications Ports (Model 0351xT)
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