Multilin 139 series User manual
•
•
INSTRUCTION MANUAL
139 SERIES
MOTOR PROTECTION RELAY
U.S. PATENTS 4,224,651
4,241,336
CANADIAN
PATENT 1,130,383
UK
PATENT 2,008,345 B
liil
MUlJ"ILIN
DIVISION
OF
DERLAN MANUFACTURING INC.
215 ANDERSON AVENUE
MARKHAM, ONTARIO,
CANADA L3P
4C7
(905) 294-6222
FAX 294-8512
Courtesy of NationalSwitchgear.com
•
•
TABLE
OF
CONTENTS
1.
INTRODUCTION
1.1
Multilm Relay Features.
1.2 Typical Applications
1.3 Relay Selection.
1.4 Technical Specifications
2.
INSTALLATION
Page
1
1
2
4
2.1
Physical Dimensions. . 5
2.2 Option Selection. 6
2.3 Mounting. 8
2.4 External Connections. . 9
2.5 Power Supply. . . . . . . . . 9
2.6 Phase
CTs.
. .
...............................
12
2.7 Ground Fault
CT.
.
......
13
2.8 Main Relay Contacts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.9 Auxiliary Relay Contacts.. . . .
..................
13
2.1o External Reset. . . . . . . . . . . . .
..
13
2
.11
Emergency Restart. . . . . . . . . . . . . . . . . . . . . . .
14
2.12 Temperature Sensing Option. . . . . . . . . . . . .
......
14
2.13 Connecting The Thermal Capacity Meter.
......................
14
2.14 Connecting The Current Output Option. .
................
14
3. SETUP
AND
USE
3.1
Controls and Indicators. . .
......
16
3.2 Maximum Load Control. . . . . . . . . . . . . . . . . . . . . . . . .
..
17
3.3 Unbalance Control. . .
...........................
18
3.4 Start Timer. . . 19
3.5 Undercurrent Control. . . . . . . . . . . . .
..
20
UM-~
.
20
3.
7 Emergency Restart. . .
......
21
3.8 Run Curve Selection. . . . . . . . . . . . . . . . . . . . . . . . . .
21
3.9 Mechanical
Jam-Rapid
Trip....
. . . . . . . . .
..
22
3.10 Option Programming. .
...
23
3.11 Ground Fault . . . . . . . . . . . . .
.................
25
3.12 Overtemperature Option. . . . . . . . .
..
26
3.13 Thermal Capacity. . . . . . . . . . . . . . . .
...
28
3.14
4-20mA
Full Load Output. . . . . . . . . . . . . 28
3.15 Fault Diagnosis.. . . . . . . . . . . . . . . . . . . . .
.......
28
3.16 Control Power.. . .
...................
28
4.
RELAY TESTING
4.1
Secondary Injection Test Equipment. .
4.2 Commissioning Relay Tests.
4.3 Overloads.
4.4 Start Timer
....
4.5 Unbalance.
4.6 Undercurrent.
4.
7 Ground Fault
.............
.
4.8 Overtemperature Option.
4.9 Routine Maintenance Verification.
4.1
o Problem Troubleshooting.
5.
THEORY OF OPERATION
.
....................
30
. . 30
..
. .
.....
30
.
........
32
..
.................
32
....................
32
..
....
32
..
.......
33
.
..
33
.
................
34
...................
36
5.1
Block Diagram
..
5.2 Circuit Diagram.
5.3 Component Locator
...
.
......
BACK PAGE FOLD OUT
BACK PAGE FOLD OUT
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Figure
2-1
2-2
2-3
2-4
2-5a
2-5b
2-6
3-1
3-2
3-3
3-4
3-5
4-1
5-1
5-2
5-3
LIST
OF
FIGURES
Tiiie
Page
Relay Dimensions. . . . . . . . . . . . . . . . . . 5
CT
Dimensions. . . . . . . . . . . . . . . . . . . 6
Relay Layout. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Relay Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Relay Wiring Diagram -AC Control Power
.....................
10
Relay Wiring Diagram
-DC
Control Power
.....................
11
Connecting Phase
CTs.
.. . . . .
................
12
Front Panel Layout. .. . . . . . . . . . .
.....
15
Time/Overload Run
Curves....
. . . . . . . . . .
..
17
RTD
Hot
Motor Compensation. . . .
................
24
Setting
RTD
Trip/Alarm Temperatures. . . . . . . . . .
.......
27
Multilin Fault Finder. . .
...........
29
Secondary Injection
Test
Set Schematic
.......................
30
Relay Block Diagram. . .
.................
37
Relay Schematic. .. . . . . . . . . . . .
.....
BACK PAGE FOLD OUT
Relay Component Locator
................
BACK PAGE FOLD OUT
LIST
OF
TABLES
Table
Trtle
Page
1-1 Multilin Relay Protection
Features.........
. . . . . . . . 1
1-2 Relay Order Code. ... . . . . . . . . . . . . . . . . . . . . 3
1-4
Technical Specifications. . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2-1 External Relay Connections. . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3-1 Controls and Indicators
....................................
16
3-2
Memory Lockout Conditions. . . . .
....................
20
3-3
Overload Level Switch Settings
..............................
22
3-4
Option Switch Settings. .. .. . .
........................
23
3-5
Ground Fault Switch Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . .
26
4-1
RTD
Resistance vs Temperature. . .
.......................
33
4-2 Problem Troubleshooting Guide. . . . . . . . . . . . . . . . .
.....
35
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•
1.
INTRODUCTION
1.1
MULTILIN RELAY FEATURES
The Multilin relay is designed to fully protectthree phase
AC
motorsagainstcon-
ditions which can cause damage.
In
addition to motor protection, the relay has
features thatcan protectassociated mechanical equipment, givean alarm before
damage results from a process malfunction, diagnose problems after a fault and
allow verification of correct relay operation during routine maintenance.
One relay is required per motor. Since phase current is monitored through cur-
rent transformers, motors of any line voltage can be protected. The relay is used
as
a pilot device to cause a contactor or breaker to open under fault conditions;
that
is,
it does
not
carry the primary
motor
current.
TABLE
1-1
MULTILIN RELAY PROTECTION FEATURES
PROTECTION FEATURES
Overload (Selectable Curves) Trip/Alarm Outputs
Locked Rotor Status Indication
Stall-Mechanical
Jam Fault Diagnosis I
Repeated Starts Memory Lockout
Single Phase/Unbalance Simple
Adjustment-No
Tools
Ground Fault Easy to Retrofit
Over
Temperature Field Testable
Undercurrent CSA Approval
1.2 TYPICAL APPLICATIONS.
Versatile features and controls allow the relay to protect associated mechanical
equipment
as
well
as
the motor. In addition to the basic electrical protection for
motors listed in table 1-1, the relay can protect against common faults due to
process problems such as:
1)
Personal safety and mechanical
protection
of
pumps using the undercur·
rent feature
to
detect
loss
of
suction
or
a closed discharge valve.
2)
Personnel
safety
and mechanical
protection
of
tans against loss of air flow
in
mines or flow in steam generating boilers using the undercurrent feature.
3)
Electrical protection ofcompressormotorsfrom excessive run-uptimecaused
by
an
open outlet using the start timer.
4)
Mechanical protection
of
gears, pumps, fans, saw mill cutters and com-
pressors against mechanical jam using the rapid trip feature.
5) Safetyto personnel from shock hazard using the ground fault feature to detect
winding shorts
or
leakage currents from moisture
in
mines.
6) Protection of motors and equipment from operator abuse using the thermal
memory lockout feature.
1
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1.3 RELAY SELECTION
The Model 139 relay
is
available in horizontal
or
vertical
mount
versions and is
equipped
with a
number
of standard features that
are
programmed for a specific
application by means of selector switches. Although these can be changed
1r.
the
field.
they
will
be
factory preset
1f
specified according
to
the
relay
order
code
of
Table 1-2. Each relay
is
shipped with a
yellow
product
specification card vvhich
showsinstalledoptionsand factory
switch
settings.
Consultthiscardand
Table 1-2
to
determine
how
the
relay has been
equipped.
Relays are availablefor use with
1or5
amp
current
transformers(CTs) which
must
be
specified with
the
order.
Since
the
relay
only
sees secondary current, any CT
ratio can be used with
the
relay
providing
it has
the
correct
secondary rating
to
match
the
relay (i.e. 1
amp
or
5
amp
type).
Although many features are standard and field selectable.
the
following options
will not
be
provided unless specifically
ordered:
1I
Ground
Fault
2) RTD Overtemperature
f'.·
3) Thermal Capacity
Meter
4)
4-20mA
Full Load
Output
Stocking ofspare relays is simplified
since
manyfeatures arefield programmable
allowinga relay to be set
up
for
different
applications. Thosefeaturesthat
must
be
specified at
time
of
order
are indicated in Table 1-2.
2
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• TABLE 1-2 RELAY ORDER CODE
' •
139
IHI
5 I 6 I
200
IC/
10110101
ID
-
GF
I
BI
YI
A I RTD I H /110 I 130 -
TC
I
~
1 I
L=Output
Options (One only/
Model
1.3
9 Retay
TC-
Thermal Capacity Meter Option
I
FLC-4-20mA
Full Load Current
Mounting
H-
Hor_1zontal-----------
I ATD Trip Temperature
°C
V-Vert1cal
CT
Inputs
1-1
amp
5-5
amp-------------~
*0ver1oad Levels
1-15
Overload Curve
Number-------~
*Mechanical
Jam
Level
150%-150
200%-200------------------"
250%-250
300%-300
W
Off-A
*Short
Circuit
B - Short Circuit Disable
C -
Short
Circuit
Enable
------------~
O=DEFEAT
1
=ENABLE
..i
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
*OPTION SWITCH SETTINGS
Cyclic Overload Compensation
Immediate Overload Warning
Undercurrent Override
Emergency
Restart
Memory
Override
Motor
Temperature Compensation
Voltage Compensation
Feeder
Protection
Specify with order: 1)
Motor
Full Load Current
2) Drive Equipment
eg.
Crusher, Pump
'-------RTD
Alann Temperature
°C
Sensor
Type
~------
H - 100
Ohm
Platinum
J -
10
Ohm Copper
K - 120
Ohm
Nickel
L - 100
Ohm
Nickel
Thermistor
-
consult
factory
~--------RTD
Option
Ground Fault Alarm
-----A
-
Alarm
Enable
B -
Alarm
Disable
*Ground
Fault
Time
Delay
X-
No
Delay
~-----------Y
-100mS Delay
Z - 2 Second Delay
~------------*Ground
Fault Sensitivity
0.5,
1,
4,
8,
12
amps
~--------------Ground
Fault
Supply Power
~--------------~D-120VAC
E-240VAC
tF-DC
t Requires Separate
DC
Power
Supply
Type:
Control Voltage
Multllln
Part No.
48V
DC:
DCS4-48
125V
DC:
DCS4·125
250V
DC:
DCS4·250
*Field
Programmable-
Othef
features must
be
specified
with order.
'
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TABLE
1-4
TECHNICAL
SPECIFICATIONS
OVERLOADS
INPUT
0-20
TIMES
RATED
CT
SECONDARY
AMPS
CONTINUOUS
EOUENCY
-
60
HZ
----~"
_______
__J
MAXIMUM
LOAD
CONTROL
-%
CT
AMPS
I
ACCURACY
"!;
3%
OF
DIAL
SETTING
TO
10
TIMES
i
FULL
LOAD
(50-95%
DIAL
SETTING)
'I
DETECTION
LEVEL
~Po
PICKUP
CALIBRATED
VALUE
RMS
AMPS
1SINEWAVE
I
INPUT
,
RANGE
10-100% 0 1-1
AMP
1
AMP
CT
MODEL
I
10-100%
05-5
AMP
5
AMP
CT
MODEL
ONSE
AVERAGE
OF
3
PHASE
RMS
VALUES
I
LOAD
TIMES
"'15%
Ot-
CURVE
VALUE'.:J
I
OVERLOAD
RAPID
TRIP
150/200/250/300
TIME
DELAY
NOMINAL
1
SEC.
,-
I
MAXIMUM
UNBALANCE
CALCULATION
'
10n
-
0avl
::
usn;.
a,
FLC
0
LESS
THAN
MAXIMUM
LOAD
CONTROL
SETTING
01
10n
--
0avl
=
UB%
0av
GREATER
THAN
MAXIMUM
LOAD
CONTROL
SETTING
WHERE
0n
=
RMS
VALUE
OF
ANY
PHASE
0av
=
AVERAGE
OF
PHASES
1 2 3
FLC
=
MAXIMUM
LOAD
CONTROL
SETTING
RANGE
4-50%
ACCURACY
±
5%
DIAL
POINTS
TRIP
DELAY
5
SECONDS:!:(
SECONDS
SHORT
CIRCUIT
TRIP
LEVEL:
10
TIMES
MAXIMUM
LOAD
CONTROL
SETTING
ACCURACY
+
10%
MAXIMUM
TIME
DELAY"
100mS@
14
TlMES
MAXIMUM
LOAD
CONTROL
SETIING
START
TIMER
RANGE
4-60
SECONDS
ACCURACY
!VOLTAGE
COMP
87
OFF)
+
10%
{VOLTAGE
COMP
87
ON.
INPUT
5·7
TIMES
MAX
LOAD)_
+
20%
ACTIVATION
INRUSH
RISES
FROM-10%
TO
101%
OF
MAXIMUM
LOAD
CONTROL
SETTING
IN
ONE
SECOND
DEACTIVATION
LOAD
CURRENT
DROPS
BELOW
MAXIMUM
LOAD
CONTROL
SETTING
4
MINIMUM
LOAD
RANGE
0-100%
OF
MAXIMUM
LOAD
CONTROL
SETTING
RESPONSE
RELAHO
TO
AVERAGE
OF
3
PHASE
RMS
ACCURACY
±
10%
RESPONSE
TIME
1
SECONO
I
RESET
LOCKOUT
LOCKOUT
TIME
30
MINUTES
±
20%
iAC
POWER
ON!
LOCKOUT
TIME
30
MINUTES
±
30%
I
I
1AC
POWER
OFFI
GROUND
FAULT
TR:P
LEVEL
0 5 L
4_
8
12
AMPS
THROUGH
CT
LEVEL
ACCURACY
+ 0 -
25%
TRIP
DELAY
50mS
+ O
~
25mS
100mS
+0 -
25mS
2
SECONDS
± 0 5
SECONDS
RTD
INPUT
SENSOR
USER
SUPPLIED
PLATINUM
COPPER
NICKEL
RTD
ALARM
TEMPERATURE
0-180°C
110°C
NOMINAL
TRIP
TEMPERATURE
0-180°C.
130°C
NOMINAL
ANALOG
OUTPUT
10mV/°C.
OV@
0°C
FULL
LOAD
OUTPUT
OPTION
NO
LOAD
OUTPUT:
4mA
FULL
LOAD
OUTPUT:
20mA
MAXIMUM
LOAD
RESISTANCE
300Q
OVERLOAD
SATURATION:
30mA
MAXIMUM
MAIN
RELAY
CONTACTS
TYPE
SINGLE
FORM
C
RATINGS
120VAC
RESISTIVE
7
AMPS
240VAC
RESISTIVE
5
AMPS
125VOC
RESISTIVE
0
25
AMPS
28VDC
RESISTIVE
5
AMPS
CONTROL
POWER
STANDARD
120/240
VAC
OPTIONAL
125
voe
POWER
5
VA
FREQUENCY
50/60
HZ
120VAC
INPUT
RANGE
90-150
VAC
240VAC
INPUT
RANGE
176-270
VAC
125VDC
INPUT
RANGE
80-150
voe
BURDEN
..
1
VA
ENVIRONMENT
OPERATING
TEMPERATURE
RANGE
-10'C
to
+60'C
OUSTPROOF
CASE
CERTIFICATION
~
APPROVED
5'1
RECOGNIZED
COMPONENT
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•
2.
INSTALLATION
2.1
PHYSICAL
DIMENSIONS
The relay circuitry
is
housed in a high impact plastic case with a clear
dust
p1
oaf
cover
for viewing indicators and control settings. The clear
cover
is
screwed on
and seals are available to prevent tampering with controls.
Dimensions for
the
relay are given in
Figure
2-1. Phase and
ground
fault
CT~
dre
available from Multilin. The dimensions
of
these CTs are shown in Figure 2-2.
FIGURE
2-1
-RELAY
DIMENSIONS
!
'
Ir::
~
1tH+~II
:.I
____
""'
__
-._s~
BAC•
=----""'
..
,
o,.
~o
o <!TD
INPUTS
I
0 o
o"
." ' 0
·'
I
~~·I
I I I I I I
0
1·1·1·1·1
·1·1 I
1·1
I I
' 2 l 4 5 6 I B 9
1U
11
12 13
1~
15 16
MODEL
139 RELAY
"
CLEAR
COVER
•
'"""'=-~~~~-=~L
PANEL
CUTOUT
l
I.'"====(
0
o=o
=""'o
===--0
l[
rrr-.~~
·:n
l'RONT
TERMINALS
17.
19.
21
All
DIMENSIONS
IN
MILLIMETERS
5
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FIGURE
2-2
CT
DIMENSIONS
GROUND
FAULT
C/T
I-----
--·--
·---
~···~~---
I
DIME~SIOl<S
R!JIT~.,1_+-+-+--+--i--+-+--+--+~
1--0-"~"+-
!.•_•+•-•+I•_'+."<~•,_•_•+-'"~"+'"-'+'~"<"+
l•_m
1
1~':;
CT·HG1'5l7·80
198:7·~1179
815
207
3-9'41!00
5~1140
CT·>-1Gnl606l
154
l52al
134
a•e
157
315
I
so
3~1
90
PHA-'>E
C/
T-WINOOW TYf'E
f'W!Mo.CT-CXJ!XoX
0-87"
--1..ll:
r---~·~~l,I,.
---
_1:~)-
~~
:i~
~;c~·.
u m m :
]]5
L..
~--~·~--
___
j\
__
J
~-
~a-32-
:i=-.,-8-----''-.,
' -
11
1 0
--e-
l
..........
.
o~·
3 • I
1141
1e91
- - I
___...,,'------"
IOIC>ES
11161
(mml
2.2 OPTION SELECTION
·In
addition tothe front panel controls, there are selectorswitches inside the relay
used to program user requirements. Consult the yellow product specification
card supplied with the relay to ensure that the factory switch settings match the
order requirements. Field changes can be made by removing the cover and
altering the switch settings. These changes should be noted on the product
specification card and kept on file
or
mounted near
the
relay.
Figure
2-3
shows switch locations. A description
of
each switch function will be
found in sections 3-8, 3-10 and 3-11. Ensure switches are firmly pushed in when
changing settings.
Once the switches are set. the cover can be replaced ready for installation.
6
Courtesy of NationalSwitchgear.com
FIGURE
2-3
OVERLOAD
LEVEL
SWITCH
SEnlNGS
Al
to
AB
FUNCTION
OVEFILOAO LEVEL SWITCH SETTINGS
•=
s.at:llOrt
Al
1
J(l
~IM
~I
""I
Al
"I
0 =Swilclllll'I '
-=
!i'>El'lllcl
I i i I
_,
~
·~-
11
-
11
...
_,
--
...
'
~
_,_
' " 0 • • ' - - - -
' ' • 0 • • - - - -
---'--
-·
" 0 0 • • - - - -
•
'°
• • 0 • ----
'
'"
0 • 0 • --- -
• " ' 0 0 • - - - -
' "'
o_._o
0 '
_____!_.)...._
20
' ' ' 0 ----
• "' 0 ' ' 0 ----
___J_[l_..;._
~
' 0 ' 0 - - -
" "' 0 0 ' 0 -
T_
- -
" • ' ' 0 0 - - - -
" ., 0 ' 0 0 - - - -
' " '-"· ' 0 0 0
" "' 0 0 0 0 - - -
Jtl
IW'll
TRIP
----- - 0 -'
1:-m.
RAPll
rRi·-
----' ' ' .::
2CXl'lo
IW'll
TRIP
-- - ' 0 ' -
"""""'""
-0 ' '
-1
.nJ!lo
RAP!O
TRIP
- - - - 0 0 ' -
~Oelell:
------ - ' 0 0 0
""
""-~0000000•0L
D 0
~-
,:I
D'1.
m
I~·,~
120 VOLT·
~
SUPPLY
240 VOLT' '
SUPPLY l c·.1 0
-I "
~
"
~A
i -
L_
-
,_.._.,
-
---
OPTION
SWffC>
SETTINGS
8'
TO
BS
7
~
~
........
GAOi/ND
FAULT
SWITCH
sEnlNGS
Ct
TO
C8
•
FUNCTION
OPTION
SWITCH
SETTINGS
jT--:::
"
.........
X -
S"1tch
On
!
--
0 =
Switch
Off
-
=No
meet
"'
B2
B3
B4
B5
B6
Bl
"
=SM!dllll'I
=
NOEl'fel:(
"
~,
~ ~
Cyclic
Overload
12...,..,1r.,
' 0 0 0
Gompensa11on
' ---0 - - -
8...,..,1,.,
o I
':
0 0
Immediate
Overload
4AJl_llllrip
0 0 ' 0
Warning
-x ---
Disable
IJOdercurreOI
- - ' - - -
_1~1•'1)
-t
0 ' 0 . 0 '
-
GO...,..,lolll
-
0107Q-
0
Eme1genc1
Restart
-- - x - - - -
'
Memory
Derear
----' ---
,___
,.,_T<ip0$i 4 -- -
IOOmSltipilllarr --
Mo!OI
Temperature
2SoanlT"'Dq
,,
- - -
Gompensat1on
- - ---x -
~ltatie
Compensation
- - --- - x
E,,_Gnlinlfilll!Al¥m
'I
- - -
Enable
Feedei
Protecnoo
- - --• - - '
7
R
TD ALARM SET
TD
TRIP
SET
R
l
~C6C1C8
Courtesy of NationalSwitchgear.com
2.3 MOUNTING
Flush mounting
of
the relay on a panel
or
switchgear
door
is shown in Figure 2-4.
Both the horizontal and vertical faceplate versions
of
the relay require the same
size rectangular panel cutout although
the
latter will be rotated 90 degrees from
that shown in Figure 2-1. Once the rectangular slot
is
cut, the relay
is
held in
place
by
two U-shaped clamps, ready
for
wiring.
Connections to
the
relay are through 16 terminals on
the
upper surtace nearthe
back.
CT
connections are made to
the
interposing transformer
module
mounted
on the back
of
the relay.
CT
wires are passed directly through
the
holes in the
module or connected to the terminals supplied
as
described in Section 2-6. If
the
RTD
option
is
supplied, 5 extra terminals will be provided on
the
back of the
relay. The mounting scheme used should allow for access to
the
terminals.
Before mounting and connecting the relay
check
the yellow product specifica-
tion card
to
ensure that all options and switch settings are set
as
desired.
FIGURE
2-4
CABINET
RELAY
MOUNTING~-
~
BRACKET \
,.,--'~
L~
/'
FRONT
PANEL
~
//
r-----
-----
201
- -
---
....
MULT\LIN
RELAY
,/
~1·
,~~
/,/
//
t'--:---:-~""'"====~'t-~~·
i--
-
----
206
---
-----·--
CLEAR COVER
8
DIMENSIONS
IN MILLIMETERS
Courtesy of NationalSwitchgear.com
2.4 EXTERNAL CONNECTIONS
The
complexity
of
wiring
to the relay will
vary
with the
number
of
options
used.
A minimal
configuration
would
require
supply
power. 3 phase
current
CT inputs
and
the
main relay
contacts
wired
in
series
with
the
contactor
control
relay
or
circuit
breaker
shunt
trip coil.
Extra
terminals
will
be
provided
on the
back
of
the relay
when
the
RTD over-
temperature
option
is
ordered.
Terminals for
other
extra
options
will be marked
if
they
havebeen supplied with the relay Consulttheyellow productspecification
card
to
venfy
which
options
have
been
provided.
A
summary
of
all
the
external
connections
that
can
be
used
appears
below.
Items
marked
as
optional
are
standard
on
all relays
but
not
necessary
for
correct
operation.
Items
marked
as
optional extra are
supplied
only
if
ordered
with
the
relay.
TABLE
2-1
EXTERNAL RELAY CONNECTIONS
INPUTS
1I Supply power 120/240V
AC
or
80-150
V
DC
(Optional Extra)
2)
Phase 1 current
CT
3)
Phase 2 current
CT
4)
Phase 3 current
CT
5)
Ground fault current
CT
(Optional Extra)
6) External reset switch (Optional)
7)
Emergency restart keysw1tch (Optional)
8) RTD temperature sensor (Optional Extra)
OUTPUTS
1I Contactor/breaker
trip-main
relay contacts
IN
O.
&
N.C)
2)
Alarm-auxiliary
relay contacts
(N
0.
&
NC.)
3)
Analog temperature output (Optional Extra with RTD)
4)
4-20mA
output of full load current (Optional Extra)
5)
Thermal capacity used meter (Optional Extra)
2.5 POWER SUPPLY
Control power to the relay
is
normally 120V
AC
or 240V
AC
at
50HZ/60HZ
The
voltage is
selected
by
means
of
soldered
jumpers
or
switch.
Power
consumption
IS5VA
Terminals
15
and
16
will
be
marked with the supply voltage for which the relay
has been set. If the voltage is changed, the extra voltage
identification
label
supplied with the relay
should
be placed next
to
terminals 15 and
16
so that
the correct value is marked. Wiring connections are shown in Figure 2-5a (A.C.
CONTROL POWER)
or
Figure 2-5b (D.C. CONTROL POWER). It
is
essential
that the relay receive
control
power before the
motor
is
energized and recom·
mended that the relay remain powered
after
a
motor
has been shut down.
An
optional
80-150V
DC
power supply is also available.
9
Courtesy of NationalSwitchgear.com
FIGURE
2·5a-RELAY
WIRING DIAGRAM I
AC
CONTROL
POWER
120n40v,..,
50/&l
11!
"'
11G'125VOC
SUf'PLY
f'OWfR
""~
IN
MOTOO
GROU~D
SHIHO
AT
ONE
ENO
ONLY
(PREFERABLY
iiElAY
TERMINAL
A)
MULTIUN
1311
RELAY
!WISTED
PAIR
NOTE:
RELAY
CONTACTS
SHOWN
IN
UNTRIPPED
STATE
(READY
FOR
STARTING)
WITH
NO
ALARM
WITH
CONTROL
POWER
APPLIED
10
PH.l.5E
3
"
P!!ASE2
"
rn"'
MOTOR
SUPPLY
i.)
!
i.
CGNTllCTOA
"'
!IAEAAER
" •
"
w • ,
.....
5AMP
PHASE
CT•
'"
r
Courtesy of NationalSwitchgear.com
FIGURE
2·5b-RELAY
WIRING DIAGRAM I
DC
CONTROL POWER
Power
Supply
Model
Number
DCS4·48
DCS4-125
DCS4-250
4
COM
GND
VIN+
1
VIN
-
DC
SUPPLY
Minimum
MULTILIN
DCS4
POWER
SUPPLY
Maximum
Operating
Voltage
30
voe
Operating
Voltage
ss
voe
so
voe
1
so
voe
1
so
voe
300
voe
NOTES:
1)
MAIN
ANO
AUX
RELAY
CONTACTS
ARE
SHOWN
WITH
CONTROL
POWER
APPLIED
AND
NO
FAULT
OR
ALARM
CONDITION
2)
OCS4
"COM"
(TERMINAL
4)
MUST
BE
TIED
DIRECTLY
TO
139
RELAY
TERMINAL
1
3)
USE
18"
LONG
(MAX.)
OF
Vw'IRE
LENGTH
lU
CONNECT
TERMINALS
16.
15
AND
1
(139
RELAY)
TO
TERMINALS
6
0J
OUT+)
5
('J
OUT-)
ANO
4
{COM).
{DCS4}
RESPECTIVELY.
4)
USE
3
CONDUCTOR
SHIELDED
CABLE
FOR
CONNECTIONS
If
WIRE
EXCEEDS
18"
LONG
GROUND
SHIELD
AT
TERMINAL
1
ONLY
(139
RELAY).
S)
POWER
SUPPLY
INPUT
IS
INTERNALLY
PROTECTED
WITH
AGC
STYLE.
FAST-ACTING
-.
FUSE
,........._~~~~~~~~~~~~~----'
11
Courtesy of NationalSwitchgear.com
2.6 PHASE CTs
One CT for each of the three motor phases
is
required to input a current into
the relay proportional to the
motor
phase current. Although polarity is not im-
portant, it is recommended that the polarity markings shown
in
Figure
2-5
be
observed
in
accordance with standard practice. The
CT
used can either have
a 1 amp or 5 amp secondary and should
be
sized
so
that the motor full load
current is between 50-95%
of
the rated
CT
primary amps. When ordering the
relay, it is necessary
to
specify whether 1 amp or 5 amp
CTs
are being used.
The
CT
ratio should
be
typed
on
the
CT
ratio label supplied and fastened
to
the front panel as shown
in
Fig.
3-1.
The maximum load control is specified
as a percentage of the
CT
value
so
the relay will work with any
CT
ratio. Con-
ventional current transformers will work with the relay which presents
negligible burden or
CTs
can
be
purchased directly from Multilin.
Five amp current transformers are connected
to
the CT module on the back
of
the relay as shown in figure 2·6b by connecting the CT secondary wires
to
the
screw terminals provided. If desired, the CT common wires can
be
connected
to a single terminal using the common bar provided
in
the accessory kit. It is
also possible
to
remove the three brass terminals and pass the
CT
wires
directly through holes in the CT module as shown in figure
2-6a.
A relay designed for 5 amp CTs can be used with 1 amp CTs by removing the
brass terminals and wrapping 5 turns through the holes as shown in figure
2-6c
or
2-6d.
If the relay is ordered
for
use with 1 amp CTs these turns will
already
be
installed as shown in figure
2-6d.
Otherwise, a conversion
kit
is
available on request. Use
of
the common bar with the 1 amp version is not
recommended as
it
may cause the windings to short.
Each
of the
CT
secondaries is isolated from the relay but one side should
be
grounded
for
safety reasons. Terminal 1
of
the relay is the circuit ground
which will also normally
be
tied
to
an
external ground.
FIGURE 2-6 PHASE
CT
WIRING
12
Courtesy of NationalSwitchgear.com
2.7
GROUND
FAULT CT
Ali
current
carrying
conductors
must
pass
through
the
ground
fault CT
window
Ifa safety
ground
is
used, it should pass
outside
the
CT window. Terminals
13
and
14 are
connected
to the
external
ground
fault CT Polarity
is
not
important
and
one
of
the
CT terminals should be
grounded
for safety reasons
A specially designed
CT
is used that
is
capable
of
outputting
low level
signals
which
allows
for
sensitive
ground
fault
detection.
It
is
recom-
mended that the
two
CT
leads
be
twisted
together
to
minimize noise
pickup. If it is desired
to
use a different ground fault
CT,
consult the factory.
2.8
MAIN
RELAY CONTACTS
The
control
relay
or
shunt
trip
coil
of
the
starter
or
circuit
breaker
is
connected
to
the
main relay
contacts
which
are available as
normally
open
or
normally
closed.
Contact ratings are 7 amps maximum at 115V AC.Silver cadmium oxide contacts
are used because
of
their
ability
to
withstand
high inrush
currents
on
inductive
-.
loads.
Consult
the factory if
these
contacts
are to
be
used for carrying
low
.
.,
currents
since
these
contacts
are
not
recommended
for
use
below
0.1
amps.
When the relay is ready
for
motor
starting the contacts
for
terminals
10,
11, 12
will
be
as shown in Figure
2·5.
When the relay trips,
or
if
control power is lost,
the contacts
will
change
to
the opposite condition. However,
if
this change
occured from
lost
control power, the main relay will retum
to
it's
normal
operating state when power
is
re-applied,
without
having
to
reset the relay. A
change in state due
to
a relay
lockout
trip, requires that the reset button be
pushed,
or
the external reset terminals shorted,
in
order
to
reset the relay. A
motor
start/stop
scheme is indicated in Figure
2·5.
Use terminals 10and11 in
conjunction with a contactor starter and terminals 10 and 12
for
a breaker
shunt trip coil.
On special order the relay can
be
equipped
so
that the main relay picks up only
on a fault: that
1s,
it is in the
untripped
state
whenever
power
is lost. If the relay is
purchased this
way,
the contact state will
be
opposite to that shown in Figure 2-5;
that
1s.
10
and
11
will be open when the motor1s readyfor starting while
10
and
12
will beclosed.
The
yellow
product
specification
card will
be
marked
"Non
fail-safe
Operation
..
if the relay
is
ordered this
way.
2.9 AUXILIARY RELAY CONTACTS
An extra set
of
contacts
which
operate
independently
of
the main relay contacts,
is
provided
in
normally
open
and
normally
closed
formats. These contacts have
the same ratings as
the
main relay
contacts
Internal
selector
switches
are used to
program
which
conditions
will activate
the auxiliary relay. This
normally
will
be
one
of
the
following:
Undercurrent,
immediate
overload warning,
ground
fault alarm
or
RTD
overtemperature
alarm.
When
the alarm
condition
is
not
present.
the
contacts
of
terminals
7,
8. 9 will be
as
shown
in
Figure
2-5.
These contacts are
normally
used for alarm purposes
to
-._
signal a fault
condition
before
the
motor
is
shut
down.
2.10 EXTERNAL RESET
An
external reset switch,
which
operates in parallel with the
front
panel reset
switch, can be
connected
to
terminals
5
and
6
for
remote
reset operation. The
13
Courtesy of NationalSwitchgear.com
normally open contacts of this external switch are closed to reset the relay. Auto
resetting of the relay after a fault has cleared can be obtained by permanently
connecting ajumper across terminals 5 and 6
2.11
EMERGENCY RESTART OPTION
If it is desired to sometimes override the memory aftera lockout trip, a keyswitch
can be connected across terminals 3 and
4.
This keyswitch, which can be
purchased from Multilin, should be located close to the relay to avoid long wire
runs, Shorting the terminals allows the
memory
to be discharged for motor
restarting, Emergency restart enable switch
84
(Section 3,10) must be on if this
feature is to be used.
A temporary jumperplaced across these terminals is also a useful way to test the
relay
or
reset it from a lockout condition allowlng restarting after a trip.
2.12 TEMPERATURE
SENSING
When the temperature sensing option is ordered, 5 terminals are added to the
~
back ofthe relay. Terminals
A,
8,
Care
connected to the customersupplied RTD
sensor
in
the motor
as
shown in Figure 2-5. The RTD sensor used should agree
with that indicated on the yellow product specification card. Consult the factory
if thermistors are to be used.
The motor temperature can be monitored if desired by connecting a standard
voltmeter across terminals D and
E.
The output from these terminals
is
0 volts
@ 0°C, 10mV/0
C.
A digital voltmeter with a
0-2
volt
DC
range will give a direct
readout of motor temperature in degrees celcius. A suitable digital meter with
°C
markings is available from Multilin for panel mounting.
The RTD sensor changes its resistance
in
proportion to temperature; conse-
quently, lead resistance compensation is employed.
To
prevent errors, each lead
must have the same resistance. Thus, identical length runs of the same wire
are required
in
connecting the sensor. Shielded 3 wire cable of #18 wire
is
recommended, This should be routed away from wires carrying large currents
and the shield grounded at
only
one end, preferably at relay terminal A
If the RTD leads are brought from the relay to a terminal block
in
the switch-gear
cabinet and
an
RTD
1s
not to be connected immediately, the terminals
A,
8,
C
should be left disconnected at the relay to prevent the wires from acting
as
an
antenna and causing nuisance tripping.
2.13 CONNECTING
THE
THERMAL
CAPACITY METER
On
relays equipped with the thermal capacity meter option a
0-1mA
output from
terminals 1and 2
(+VE)
is
provided to drive the meter supplied with this option.
It
may be desirable to place this meter away from the relay near the operator
controlling the motor since accuracy
is
not affected by lead length. This allows
the user to determine how close the relay
is
to tripping the motor.
2.14 CONNECTING
THE
CURRENT OUTPUT OPTION
When the relay has been ordered with this option a
4-20mA
output
from
terminals
1and2
(+VE)
proportional to the percentage of full load motorcurrent
14
Courtesy of NationalSwitchgear.com
1s
provided. Current levels are
not
affected
by
wire
length and are suitable
for driving chart recorders, programmable controllers
or
a computer interface.
Output
current
saturates
below
30mA
on overloads. The wire
connected
to
terminal 1 may also be grounded at the receiver.
3.
SETUP
AND
USE
FIGURE
3-1
FRONT
PANEL LAYOUT
15
Courtesy of NationalSwitchgear.com
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