Sel 411L - Table 2.2 I;O Interface Boards Control Inputs; Table 2.3 I;O Interface Boards Control Outputs

P.2.12
SEL-411L Relay Protection Manual Date Code 20151029
Installation
Plug-In Boards
I/O Interface Board Inputs
The INTC and INTD I/O interface board has two groups of nine (9) common
contacts (18 total) and six (6) independent control inputs. The INT2, INT7,
and INTE I/O interface boards have eight independent control inputs. All
independent inputs are isolated from other inputs. These control inputs are
optoisolated and hence are not polarity sensitive, i.e., the relay will detect
input changes with voltage applied at either polarity, or ac signals when
properly configured, (see Optoisolated).
Table 2.2 is a comparison of the I/O board input capacities; the table also
shows the absence of I/O inputs on the Main Board. See Control Inputs on
page P.1.14 for complete control input specifications.
.
I/O Interface Board Outputs
NOTE: Form A control outputs
cannot be jumpered to Form B.
The I/O interface boards vary by the type and amount of output capabilities.
Table 2.3 lists the outputs of the I/O interface boards. Information about the
standard and hybrid (high-current interrupting) control outputs is in Control
Outputs.
L
Table 2.2 I/O Interface Boards Control Inputs
Board Number Independent Contact Pairs Common Contacts
INT2
a
a
The INT2, INT7, INTC, INTD, and INTE control inputs are optoisolated and are not polarity
sensitive.
8
INT7
a
8
INTC
a
6 Two sets of 9
INTD
a
6 Two sets of 9
INTE
a
8
Main Board 0 0
CAUTION
Substation battery systems that have
either a high resistance to ground
(greater than 10 k) or are
ungrounded when used in conjunction
with many direct-coupled inputs can
reflect a dc voltage offset between
battery rails. Similar conditions can
exist for battery monitoring systems
that have high-resistance balancing
circuits or floating grounds. For these
applications, SEL provides optional
ground-isolated (optoisolated) contact
inputs. In addition, SEL has published
an application advisory on this issue.
Contact the factory for more
information.
Table 2.3 I/O Interface Boards Control Outputs
Standard
High-Speed,
High-Current
Interrupting
a
a
High-Speed, High-Current Interrupting.
Hybrid
b
b
High-Current Interrupting.
Board Number Form A Form C Form A Form A
INT2 13 2
INTC
c
c
INT4 with polarity sensitive outputs.
26
INTD
d
d
INT4 with standard outputs.
8
INT7 2 13
INTE
e
e
INT8 with polarity sensitive outputs.
8
Main Board 0 0 0