Basler BE1-79 User manual

INSTRUCTION MANUAL
FOR
MULTIPLE SHOT RECLOSING RELAY
MODEL NUMBER BE1-79
R SQ.D.STATEPROTECTM: IIEl.AY •
, ~
C I'IEa..osuRE TIME OELAY ISECOHCI8I
,
E F ~ U
~: . '. '
~ ... :. :: .
~ ~
1ST 2ND 3RD
I N ST~A.NEOOS
,~
, , '.
"".,,'"
u
,
"
..
~
RECLOSING A3AA1CN2M1F
~ Basler Electric
:l . Highland, Illinois
Publication : 9136800990
Revision: 0

I N T ROD U C T ION
The purpose of this Instruction Manual is to furnish
information concerning the operation and installation
of this device. To accomplish this, the following is
provided.
1. Specifications
2. Functional description
3. Operational tests
4. Mounting information
A Service Manual, publication 9 1368 00 620
available as an aid in troubleshooting and
WARNING
is
repair.
TO AVOID PERSONAL INJURY . OR EQUIPMENT DAMAGE,
ONLY QUALIFIED PERSONNEL SHOULD PERFORM THE
PROCEDURES PRESENTED IN THIS MANUAL.
THIS MANUAL MAY BE USED IN PLACE OF ALL EARLIER EDITIONS.
FOR INFORMATION CONCERNING EARLIER EDITIONS, SEE SECTION 7.
REV A B C D
ECA 7356 7594
8395 10895
;

First Printing: December. 1979
Printed in USA
CONFIDENTIAL INFORMATION
OF BASLER ELECTRIC COMPANY, HIGHLAND, ILL.
IT IS LOANED FOR CONFIDENTIAL USE, SUBJECT
TO RETURN ON REQUEST, AND WITH THE MUTUAL
UNDERSTANDING THAT IT WILL NOT BE USED IN
ANY MANNER DETRIMENTAL TO THE INTEREST OF
BASLER ELECTRIC COMPANY.
It Is not the Intention of this lllllrual to cover aU detan. 8nd variations
in eqJipnent, not'" does this ... ruel pr'QI\Ilde dati for fNery possible contin-
gency regarclfrQ Instal lat ion Of" operation. The ...... n.bllity arod design of
an futures end options are slbject to .edIfication without notice.
ShouLd further infOMllltion be r~ired. all hsler Electric: Ccrrpany.
NighLerd, Illinois.
BOX 288 HtGHLAHD, IL 8224e USA PHOM!: .,&-es.-2341 FAX 01&-e54-2351
; i

SECTION 1.
SECTION 2.
SECTION 3 .
SECTION 4 .
SECTION 5 .
SECTION 6.
SECTION 7.
CON TEN T S
GENERAL INFORMATION
Purpose. . . . . . . .
Description .
.... .
Model and Style Number
Styl e Chart ..
Specifications . . ..
CIRCUITS
General ..
Power Supply ..
Contact Sens ing.
Counter .. . . .
Reclose
Memory .
Reclose
Time Delay Circuit
Manual Reset . . .
Res et Option . . . . . . .
Reclose Fail
Option . .. .
lockout
Option . . . . . . .
In stantaneous Trip Enable Option
Po wer Supply Status Output ..
CONTROLS AND INDICATORS
INSTALLATION
Genera 1. . . . . . . . . . .
Relay Operating Precautions.
Dielectric Test.
Mounting ..
Con nections. ....... .
Stori ng. . . . . . • . . . .
TESTING AND CALIBRATION
•
•
• •
•
•
Genera 1. . . . . . . . . . . . . . . . . .
Definite
Time Delay Test and Calibration .
Continuous Time Delay Te st and Calibration
MAINTENANCE
Genera 1. . . .
oi sasseni> ly. .
Replacing Parts .
MANUAL CHANGE INFORMATION
iii
~ a •• '.r EIe(:Irk:
=>--
1-1
1-1
1-1
1-2
1-3
1-4
2-1
2-1
2-1
2-1
2-1
2-2
2-2
2-3
2-3
2-4
2-4
2-4
2-5
3-1
4-1
4-1
4-1
4-1
4-2
4-2
4-2
5-1
5-1
5-1
5-8
6-1
6-1
6-1
6-2
7-1

This page intentionally left blank.

SECTION 1
GENERAL INFORMATION
PURPOSE
The 8E1-79 Multiple Shot Reclosing Relay is a solid-state device that provides
automatic reclosure of
circuit breakers that have been tripped by a protective
relay.
Because many power circuit faults are temporary. the reclosing relay can
be programmed to make up to three attempts to re-establish service.
DESCRIPTION
The Basler Multiple Shot Reclosing Relay senses opening and closing of an asso-
ciated
circuit breaker. When the breaker opens, a form B auxiliary contact on
the controlled circuit breaker closes. The relay senses this contact closure
and.
after a programmed interval to allow any arcing to dissipate, recloses the
breaker.
If the fault still exists after the breaker has been reclosed, the
relay will
make two more attempts at independently programmable intervals . If
the fault is still not cleared, and the breaker trips a fourth time, no further
attempts will be made to automatically reclose the breaker.
Programming of the individual reclosing intervals is available with either defi-
nite time delay steps or continuously adjustable intervals. With the definite
time option, the reclosing delay intervals are individually selected on three
front
panel switches . Each switch has five pOSitions and covers a range from
0.2 to 60 seconds. With the continuous time option, the reclosing delay inter-
vals are individually set with three front panel controls and associated range
toggle switches.
Each control (together with it s range switch) provides a con-
tinuous adjustment
from 0.2 to 60 seconds.
Adisable function
is provided in the reclosing relay to inhibit automatic
reclosing.
When an external contact connected to the relay's disable input ;s
closed, the relay ignores any breaker tripping action and no automatic reclosing
is attempted.
Options are available:
(1)
To provide either isolated or non-isolated contact sensing;
(2)
To limit the number of reclosure attempts;
(3)
To enable instantaneous breaker tripping for any trip;
(4) To initiate a remote alarm when a reclosure attempt is
unsuccessful (the breaker does not close within a set time
limit); and
(5) To reset the relay when a rec10sure is not followed by a
trip after a programmed interval.
The relay assembly is mounted in a drawout cradle and enclosed in a standard,
utility style case available with either semi-flush or projection mounting.
Circuit
components are accessible by removal of t he individual printed circuit
boards from the relay cradle, and by using an extender board (Basler part number
9112930 101) to test or troubleshoot.
1-1

n"
8El-79
MODEL AND STYLE NUMBER
The electrical characteristics and optional features included in a particular
style 8El-79 relay are defined by a combination of letters and numbers that make
up its style number. The model number. followed by the style number. appears on
the front panel. drawout cradle, and inside the case assembly. The sample style
number below, as well as in Figure I-I, illustrates the use of the Style Number
Identification Chart (on page 1-3) in identifying the particular featUres of an
individual relay. Upon receipt of a reclosing relay. be sure to check the style
number against the requisition and packing list to see that they agree.
SAMPLE STYLE NUMBER AlA ASC A2H1F
The style number above describes a 6EI-79 Multiple Shot Reclosing Relay
having the following features:
(A) Multiple shot reclosing
(1) Lockout and automatic reset
(A) Instantaneous trip enable output can be selectably controlled
for each of 4 (maximum) pre-trip periods
(AS) Continuously adjustable reclosure time delay
(e) Operating power obtained from nominal 125 Vdc or 100/120 Vac
external source
(A) Reset time delay adjustable from 10 to 60 seconds
(2) Maximum reclosing signal of 2 to 3 seconds duration
(M) Isolated contact sensing input(s)
(1) Reclose failure alarm contact
(F) Semi-flush mounting
,.~
AIIO UK!
IIClOSIU
TIl'( on"r
UKl
'Jlltl
01'1101
•
Figure l-~. style Number Block Diagram
1-2
Dl'1I0I
•
ClPTlOI
•

BE I-79
STYLE NUMBER IDENTIFICATION CHART
L----:;;BE ;;;;;- 1' 7 ;:;;,- S.......J1 0 0 0 - 0 0 0 - 0 0 0 0 0
"""
A) lo4ultl-"'OI
LOCI( OUl
AND R<SET
0) Non.
I) Lockout &
end Automatic
R_t creu r la
2) AutomOlle&
R_I creutt
3) l ockout
_It
NOTES :
INSTANTANEOOS
TRIP ENABLE:
N) Non.
A) Seiec:tobl.
A\ Contoct-NO
B5 s.leetobl.
&. Contoet-NC
REa.osuRE
TlIo4E OElAY
A' ) D.fkllt.
Tm. Swtlc:h
0.2, 2. 15.
4.5 , 60 s.e.
AS ) Conthou.y
Ad),lltgbll
0.2-80 s.e.
PO"'"
SUPPLY
0) 24 Vde
8) .eVdc
C) 125 Vde:
1 00/120
V"
.&. Th ' Int.-nal 1091c 0' t .... ("0)' Pf'O'01o.. thot. .......
th e "'0)" .. pow.-.d up. th •• Ie no dIff ..... c.
Mt_ OpUon A and Option B Nnc:tJon. aut with
pow. Off, the Option A contoct Ie al wa )" 01*\.
G'ld the OptJon B contact .. aI .. op dOMd. s..
tolll. beI_.
OPTION 1 OPlION 2 OPllON ..
D) ContlnOUI L)
Non- l lOIoted
F) SemI -F1u'"
.-
",,",oct
t.l ountln'l
Sl9n ol Unt.
Sen,lng Input
") IlOIot.cl p) Pro
jec:t lon
",,",oct lo4ountln'l
~~
0_ .
2)
" -~
s-n, ln g Input
.od_
SIgnal 2- 3
s.c. (Non
Ad)ll t obl. )
3)
"-
'od_
Sl9n al 5-&
s.c:.. ( Non
Ad)Jltobl.)
OPTION .3
D)
N_
t) Red08Unl .&
Falu r. Alarm
0)
Po • • Supply
Sto tu. Outp ut
.... .., the po...- .upply hi X. on .>rt..-nol ClOI'Itoet
_, lng moduli 18 requnct:
.. """ ,
,
• I 14&3
01 Ice
I 1463 01 104
3 All ",0)" en alpPlliMI In on 51--':. co ...
.&. It rwet tim .... ~ Iod<out c.\d r_t mun be
,~,
& It lockout and .... 1 an I or 2. ,...t tm ..
mu.t be A.
.& If Option J .. 1. Option 1 mu.t be 2 or .l.
1-3

SPECIFICATIONS
Power Input
Contact Sensing
(Applies to the breaker
sensing input and the
disable contact input.)
Outputs
BEl-79
In order to satisfy a variety of
external voltage sources that may be
available. one of the four types of power
supplies listed in Table 1-1 may be
optionally selected to provide internal
relay operating power.
TABLE 1-1. POWER SUPPLY OPTIONS
~In.l
Input Buni!n
It
T".
Input
Voltage
HOIIIlnll Volt.ge
Volt.gl
R.ngt (ReIlY
tripped)
•
48 Vdc:
24 to 60 Vdc 4.5' II
C
125 Ydc
62 to ISO Yde
6.7 II
120 VIC
go to 132 VIC 11 .3 VA I
O· 24 YcIc 12 to
32 'ide
l.8 1/
"
250 vde
140 to 280 Ydc
5.8 111
230 he
19o to 210 VIC
11.6 v,. I
• Type 0 powr supply IIf,)' Initially require 14 vdc to begin oper.t'nS' .
Once operltlng. the ¥oltage NY be reducfod to 12 vde 1M OJ)er.tlon
wfll ContillUt.
t Rel..,.s with Type I supply require An uttm.l nnllng .:!dull!.
S At SO or 60 H.t .
The contact sensing circuits require
user-supplied contacts with a
minimum
rating of 0.05 A at 250 Vdc. Sensin9
current is supplied by the relay in
styles with isolated sensin9. Styles
with non-isolated sensing require an
externally applied dc sensin9 voltage
equal to the
relay's dc power supply
input rating. Burden per contact for
non-isolated sensing, dependent
on power
supply type. is listed below.
Output contacts are rated as follows:
Resistive
1207240 Vac - make 30 A for 0.2 seconds,
carry 7 Acontinuously, and
break 7 A.
250 Vdc make and carry 30 A for 0.2
seconds. carry 7 A con-
tinuously, break 0.1 A.
500 Vdc - make and carry 15 A for 0.2
seconds, carry 7 Acon-
tinuously, break 0.1 A.
1-4

Reclosure Time Oelay
Reclose Signal
Reset Time Oelay Option
Timing Accuracy
Operating Temperature
Storage Temperature
Shock
Vibration
Surge Withstand Capability
Case size
Weight
BEl-79
Inductive
120/240 Vac, 125 Vdc, 250 Vdc -break
0.1 A (L / R = 0.04).
Continuously adjustable or switch-
selected according to the option chosen.
In either case. the overall, adjustment
range is from 0.2 to 60 seconds.
The reclosing output contact may be
specified to provide a continuous closing
signal until reset by breaker closure, or
for a maximum duration of 2 to 3 seconds,
or for a maximum duration of 5 to 6
seconds, as defined by the style number
designation.
Provides switch-selected reset delays of
10, IS, 20, 40 and 60 seconds.
Within 5~ for both reset and reclosure
time delays, over the
specified range of
operating temperatures and voltages.
-20°C (-4°F) to +6S"C (+149"F).
-SO"C (-S8"F) to +90°C (+194"F).
In standard tests the relay has withstood
ISg In each of three mutually perpen-
dicular axes without structural damage or
degradation of performance.
In standard tests the relay has withstood
2g In each of three mutually perpen-
dicular axes swept over the range of 10
to 500 Hz for a total of six sweeps, IS
minutes each sweep. without structural
damage or degradation of performance.
Qualified to ANSI/IEEE C37.90-1978 and
C37.90a-1974 Surge Withstand Capability
Test and IEC 255-5 Impulse Test.
51.
11.75 pounds net.
1-5

This page intentionally left blank.

SECTION 2
CIRCUITS
GENERAL
The circuit descriptions that follow are referenced to the functional block
diagram of Figure 2-1.
POWER SUPPLY
The solid-state power supply is a low burden. flyback switching design which
delivers a nominal +12 Vdc to internal circuitry. The power supply inputs are
not
polarity sensitTve . A red LED illuminates to indicate that the power supply
is functioning properly.
If the Type X power supply is used, an external sensing input module is required
and connections must be modified accordingly (Figure 4-6),
CONTACT SENSING
Oepending on the style of the relay. contact sensing current is obtained either
directly from the Multiple Shot Reclosing Relay (for isolated contact sensingl,
or from any external de power source with a voltage rating equal to the power
supplyls nominal dc input voltage (for non-isolated contact sensing). (Ac is
not used for contact sensing.) The function of each set of senSing contacts is
described in Table 2-1.
TABLE 2-1. FUNCTION OF SENSING CONTACTS
Contact Designation Function
Disable Contact
DC A form
Acontact on the controlled
circuit breaker.
When this contact
is closed, the relay is inhibited
from responding to subsequent breaker
operations.
Breaker
52b A form B auxiliary contact of the
controlled breaker
used to indicate
whether the breaker is open or closed.
COUNTER
The counter is incremented each time the sensing circuit detects a change of
state at the breaker. Initially. the counter has a count of zero and the
breaker
is closed. Table 2-2 relates the succeeding counts (corresponding to
each
change of state of the breaker) to the relayls response.
2-1

6£1-79
The counter is reset to zero when the rel~ is manually reset or, in relays
supplied with the
reset option, the counter is automatically reset to zero when
the breaker remains closed for the entire reset delay. Counting is inhibited
when the counter reaches a count of 7, when the disable contacts are closed, or
when the LOCKOUT feature is enabled. If the relay is manually reset before the
breaker is restored, the counter is reset but counting is inhibited until
breaker closure occurs.
RECLOSE MEMORY
Th e reclose memory responds to the counter, lighting the 1ST, 2ND, and 3RD LED
reclosure indicators respectively as the proper count is reached. The reclosure
indicators remain
lit until the relay is manually reset or operating power is
interrupted.
RECLOSE TIME DELAY CIRCUIT
Counts I, 3, and 5 from the counter cause the reclose time delay circuit to com-
pare the selected delay interval with the elapsing time. When the two become
equal, a signal is generated to activate the reclosing contacts.
•
,'"
oc
-
I ~.
~ ,
-
~ .~
-I "",y 1 ~TQ ~ CIA().mIY
~,
~
~
-;If-
rl ~o,::"
..m
om~
I ~!~ I
UCLOU
f}rr~l
_I ,~'n.t(:~',..
'#OIL
L"lJ I-
I _H ~!IO"
0" ' 0..
'K L OSI MlMOIIY
-
I"' ,i,-I r iND ' riD" ;
--l ~(.I, K II
:l;\J't<"~'
C()IO I...c1 I
w:: l .1 l . J
~ I" ~I"G
(Ot,,,.lf1J
~
.~,
(O" I ...c~ I t
U .. Sli'OG
~
IKLOS!
1
~ ~L~'NG r
"~
~,
("'LaT
0>.
~ La; lOUl
L1{OU }
O"~
-I I--
u.
mSl ....'.
~
.~~
'''S'~H' ~
!lIP IN.Ul.I
."~
~,~
-II--
Figure 2-1. Functional Block Diagram
2-2
~
E=:I e .. ,. , Ele.elrlc
=_ ......
t-
[-
~
~
~

8E1-79
MANUAL RESET
Manual reset of the relay is by a momentary switch which may be actuated by a
linkage accessible
through the front cover of th e case. Whenever the switch is
actuated. it resets the counter to zero and clears the reclose memory.
extinguishing any RECLOSURE or LOCKOUT LEOs that were on and lighting the RESET
LEO. (But counting is inhibited until breaker is reclosed.)
TABLE 2-2. BREAKER STATE AND COUNT SEQUENCE
Breaker Condition Count
Result
Breaker closes and 0 RESET LED is illuminated.
counter resets
Breaker opens
1
The first reclose time delay starts. A
BREAKER CLOSE signal is generated at the
end of this time delay.
First reclosure of 2
The reclose memory turns on 1ST LED.
breaker
Reset timer is started.
Breaker opens prior to 3
The second reclose time
delay starts. Th
expiration of reset
BREAKER CLOSE signal is
generated at end
delay of
this time delay.
Second reclosure of 4 Reclose memory illuminates 2ND LED.
breaker
Reset timer is started.
Breaker opens prior to 5
Third reclose time delay starts. The
expiration of reset
Breaker close signal is generated at the
delay
end of this time delay.
Third reclosure of 6
Rec lose memory illuminates
3RD LED.
breaker
Reset timer is started.
Breaker opens prior to 7
Counter is inhibited. Further relay
expiration of reset action
is inhibited until breaker is
delay closed
by other means and the relay is
reset.
RESET OPTION
The reset option resets the counter to zero when the
a preprogrammed interval established by a RESET TIME
breaker
control.
remains closed
During this
for
2-3

BEJ-79
interval. a reopening of the controlled breaker will terminate the reset timing
cycle.
For any subsequent breaker closure the reset timer must then begin its
timing cycle anew.
When the controlled breaker is manually closed following a lockout condition. or
following a successful automatic reclosure. the
reset timer option will be ini-
tiated. The timer will then reset the counter to zero at completion of its
timing cycle.
RECLOSE FAIL OPTION
The reclose fail option monitors the output of the breaker auxiliary contact
(52b) senSing circuit and the reclose time del~ circuit. When the reclose time
delay circuit actuates the reclosing contacts, the reclose fail option looks for
an indication that the breaker is closed. If this indication is not received
within a specified interval (possibly
due to breaker failure), the reclose fail
circuits inhibit further operation of the counter, locking out the reclosing
relay
and interrupting current to the breaker closing coil. A REC FAIL indica-
tor on the relay is illuminated and an optional alarm relay is energized when a
reclose
failure occurs. The reclose failure option may be reset by manually
resetting the relay or, in relays equipped with the automatic reset option, by
the breaker remaining closed for the programmed reset time interval after the
breaker
is normally closed.
LOCKOUT OPTION
The lockout option provides the capability of preprogramming the relay for zero,
one,
two, or three reclosures. Afour position LOCKOUT selector switch is pro-
vided
on the relay front panel for this programming. When a reclosing sequence
has reached the limit imposed by the lockout setting, the counter and the
reclose time delay
circuits are inhibited until the relay is reset. When the
relay
is locked-out, the LOCKOUT indicator is illuminated, and the lockout alarm
contact
is closed.
Note that when the LOCKOUT switch is set to I, the relay is locked out when the
counter counts the
first trip. effectively eliminating automatic reclosing.
Setting the
LOCKOUT switch to 2, 3. or 4 trips permits one. two. or three reclo-
sures respectively.
INSTANTANEOUS TRIP ENABLE OPTION
The Instantaneous Trip Enable Option includes the following items.
(a)
An additional output rel~ .
two versions of this option:
the
two versions is shown in
Note that the style chart shows
A and B. The truth table for
Table
2-3 .
(b)
Four toggle switches located on the front panel and labeled
INSTANTANEOUS ENABLE I, 2, 3, and 4. Each switch number
represents. in order of progression, one of the four breaker
trips that may occur in a reclosing sequence.
(c)
Logic circuitry which causes the aforementioned contact to
be closed for the time period which precedes any of four
breaker
trips IF the corresponding switch is UP.
2-4
~
c::.I 8 •• 1 •• Elect.ic
=.1 __

8£1-79
Application of this option is illustrated in Figure 4-5, which shows how the
instantaneous
trip enable contact (K4) may be used to enable selected devices in
the
scheme which controls the breaker.
POWER SUPPLY STATUS OUTPUT (Option 3-6)
The power supply status output rel~ is energized upon power-up. thus opening
its contact. Normal relay operating voltage maintains the power supply status
output relay continually energized and its output contact open. However, if the
power supply output voltage falls below the requirements of proper operation,
the
power supply output relay de-energizes, thus closing the NC output con-
tact.
TABLE 2-3.
TRUTH TABLE FOR THE INSTANTANEOUS TRIP ENABLE OPTION
INSTANTANEOUS
WITH POWER TO RELAY NO POWER TO RELAY
RIP EN ABLE (I TE
OPTION A OPTION B OPTION A OPTION B
CONDITIONS
CONTACT CONTACT CONTACT CONTACT
BREAKER CLOSED
AND RELEVANT
CLOSED CLOSED
OPEN
CLOSED
ITE SWITCH
CLOSED.
ALL OTHER
OPEN
OPEN OPEN CLOSED
CONDITIONS
2-5
~
r::::=J e .... , E~elrlc:
=--

This page intentionally left blank.

SECTION 3
CONTROLS AND INDICATORS
POWER Indicator
RESET Switch
RESET Indicator
REC FAIL Indicator
(reclose fail option only)
RECLOSURE TIME DELAY
Indicators (1ST, 2ND,
3RD)
RECLOSURE TIME DELAY
Switches (1st, 2nd,
and 3rd) (on relays
with Definite
Time -
Option All
RECLOSURE TIME DELAY
Controls (1st, 2nd,
and 3rd) (on relays
with Continuously
Adjustable Time -
Opt i on AS)
-
A red light emitting diode illuminates
when the relay power supply is supplying
a
nominal +12 Vdc to the relay internal
circuitry.-
A momentary switch which resets the
circuitry of the relay. The switch may
be actuated by a lever which extends
through the cover. Resetting the relay
resets the counter. the reclose fail. and
the lockout options; also, it tUrns ON the
RESET indicator, and turns OFF the REC
FAIL, LOCKOUT, and RECLOSURE indicators.
This green light emitting diode illu-
minates when the relay is reset.
This red light emitting diode illuminates
when a failure to reclose has occurred .
These red light emitting diodes illu-
minates when the corresponding reclosure
attempt
has occurred. They extinguish
when the relay is manually reset. or when
power is interrupted. These indicators
provide a visual record
of the maximum
number of reclosure attempts that have
occurred during any (reclose) sequence
taking place since the
last manual re set
of the relay.
Each of these five-position se lector
switches allows reclosure del~s of 0.2
(+10%) or 2, IS, 45, and 60 (+5%)
seconds. A selector switch is provided
for each reclosure.
A three position toggle switch allows
reclosure delay
range selection of 0.2-2.0.
1.5-15, or 6.0-60 seconds. Acontinuously
adjustable dial sets the precise delay
within the selected range.
3-1
r::::::.I e., •• , ElKlrlc
=.J ____ . .....

INSTANTANEOUS I, 2, 3, and 4
Switches (Instantaneous Trip
Enable Option)
LOCKOUT Switch
(Lockout Option)
LOCKOUT indicator
(Lockout Option)
RESET TIME (SEC) Switch
(Reset Time 'Option)
BEI-79
In the up position, these switches
provide closure
of the instantaneous trip
enable output (ITEO) contact prior to the
corresponding breaker trip. For example,
switch I (when UP) closes the ITEO
contact when the relay is reset.
Similarly. switches 2. 3, and 4 close the
contact prior to the second, third, and
fourth (last) trip respectively. (The
ITEO contact is typically used in
conjunction with an instantaneous over-
current protection relay as
shown in
Figure 4-5.)
A four-position switch that establis hes
the maximum number of trips permitted
prior to lockout. When set to posit i on
I, the reclosing relay is disabled. When
set to positions 2. 3, or 4. maximum of
one, two, or three reclosures are permit-
ted respectively . (The last permissible
trip causes lockout rather than reclosure.)
A red light emitting diode illuminates
when the relay is inhibited from further
operation by the lockout option.
A five-position switch with positions
labeled 10, IS, 20, 40, and 60 . Setting
the switch determines the number of
seconds the breaker must remain closed
before the relay will automatically
reset. If the relay is locked out by the
lockout option,
or if a reclose failure
h as occured, manual reclosing of the
breaker will reset the relay after the
breaker
has remained closed for the
indicated
interval.
Note that when the reset timer option
resets the relay, the RECLOSURE TIME
DELAY indicators are not extinguished.
These indicators remain illuminated
until the relay is manually reset.
3-2