Schweitzer Engineering SEL-387-0 Instruction Manual Download Page 344

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8.14

SEL-387-0, -5, -6 Relay

Instruction Manual

Date Code 20170601

Front-Panel Interface

Pushbuttons

For example, suppose the local control switch with local bit output LB1 is
configured as an ON/OFF type switch (see

Figure 8.2

If power to the relay is turned off and then turned on again, local bit LB1
remains at logical 1. This is similar to a traditional panel, where enabling/
disabling of other functions is accomplished by panel-mounted switches. If dc
control voltage to the panel is lost and then restored, the switch positions are
still in place. If the switch is in the enable position (switch closed) before the
power outage, it will be in the same position when power is restored.

Pulse Output Contacts

Use the control pushbutton

{CNTRL}

to mimic the

PUL

se,

OPE

n, and

CLO

serial port commands. This is useful during relay checkout to verify that
output contacts actually function in response to a command.

Pulse Output Contacts

are available in the

{CNTRL}

menu after the Local Bit

pushbutton functions. The screen will prompt for

Pulse Close Open

. Use the

right/left arrow keys and

{SELECT}

to choose.

Pulse

is selected, the next screen will prompt for the output to be pulsed.

These are

OUT101

OUT107

and

ALARM

. Use the up/down arrow keys and

{SELECT}

to choose. The display will follow with a

Yes/No

verification request.

Again, use the up/down arrow keys and

{SELECT}

to choose.

The relay will pulse the output contact for one second then return to the
contact selection screen in case there are more contacts to test.

{CANCEL}

will

return to the main

CNTRL

menu.

{EXIT}

will abort the command and return to

the default display.

is selected, the next screen prompts for the breaker (Bk1 to Bk4) to be

closed. Use the right/left arrow keys and

{SELECT}

to choose, for example Bk1.

The relay then asks

Close Bkr 1? Yes No

. Use the right/left arrow keys and

{SELECT}

to choose. If

Yes

, the relay asserts the CC1 Relay Word bit. If CC1

has been assigned to the CL1 Close Logic setting, the breaker will close. If

is selected, the relay returns to the

menu.

Open

is selected, a sequence exactly like the one for

takes place. If

Yes

is selected, the relay assert Relay Word bit OC1 for Bkr 1, and if this bit

has been assigned to the TR1 Trip Logic setting, the breaker will open. The

TRIP

front-panel LED will also light. It can be turned off by pushing the

{TARGET RESET}

pushbutton or by the

TAR R

serial port command.

Since all three

{CNTRL}

functions are legitimate event types, an Event Report

will be triggered whenever any is activated. An automatic message will be
sent to any port set to receive messages. If the contact outputs are listed as
SER triggers, the contact assertion and deassertion will appear in the SER
report, with time tags. Contact operate timing can thus be easily analyzed.

GROUP

The

{GROUP}

function is identical to the

GRO

and

GRO

(

= 1 to 6) serial

port commands.

Logical 1

LB1

Relay

Word

Bit

Enable

FAN CONTROL

Disable

(logical 0)

NOTE:

The

{CNTRL}

function, while

useful during testing, should not be
used while the relay is actually in
service. During the one-second
interval while contact

OUT10X

is being

pulsed, all other

OUT10Y

contacts are

frozen in their existing state and are
not permitted to change. This could
prevent a trip or other vital output
from being issued during the pulse
interval.