P.2.34
SEL-411L Relay Protection Manual Date Code 20151029
Installation
Connection
Optoisolated
Optoisolated control inputs are not polarity sensitive. These inputs respond to
voltage of either polarity, and can be used with ac control signals when
properly configured.
Note that INTC and INTD I/O interface boards have two sets of nine inputs
that share a common leg (see Figure 2.10).
Assigning
To assign the functions of the control inputs, see Operating the Relay Inputs
and Outputs on page P.10.21 for more details. You can also use
ACSELERATOR QuickSet to set and verify operation of the inputs.
Control Outputs
The relay has three types of outputs:
➤ Standard outputs
➤ Hybrid (high-current-interrupting) outputs
➤ High-speed, high-current interrupting polarity sensitive outputs
Table 2.3 lists the control outputs available with the relay.
See Control Outputs for more information.
You can connect the standard outputs in either ac or dc circuits. Connect the
high-speed, high-current interrupting and hybrid (high-current-interrupting)
outputs to dc circuits only. The screw terminal connector legends alert you
about this requirement by showing polarity marks on the hybrid
(high-current-interrupting) contacts and polarity and HS marks on the
high-speed, high-current interrupting contacts.
Alarm Output
The relay monitors internal processes and hardware in continual self-tests.
Also see Relay Self-Tests on page P.11.38. If the relay senses an
out-of-tolerance condition, the relay declares a Status Warning or a Status
Failure. The relay signals a Status Warning by pulsing the HALARM,
HALARMP, and HALARMA Relay Word bits (hardware alarm) to a logical 1
for five seconds. For a status failure, the relay latches the HALARML and
HALARM Relay Word bits at logical 1. Some hardware failures prevent the
relay from operating. In such cases, Relay Word bits HALARML and
HALARM do not assert.
Once HALARMP pulses, Relay Word bit HALARMA continues to assert for
approximately five seconds once per minute to indicate that a hardware
warning has occurred. HALARMA continues to pulse until it is reset by
pulsing SEL
OGIC control equation RST_HAL. Restarting the relay also resets
HALARMA. HALARMP does not assert again for the same alarm condition
unless the condition is cleared and returns.
SEL-411L relays will restart on certain diagnostic failures. When this occurs,
the relay will log a Diagnostic Restart in the SER. See Appendix A: Firmware
and Manual Versions for affected firmware revisions. To provide remote status
indication, connect the b contact of OUT208 to your control system remote
alarm input and program the output SEL
OGIC control equation to respond to
NOT (SALARM OR HALARM).
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