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�TAVRIDA ELECTRICI N D U S T R I A L G R O U P
L O W V O L T A G EV A C U U M C O N T A C T O R
In Effect Since 03.09.2007Version 06AXCA 670200.009
CONTENTS
2Contents
Presentation 3
Product range 4
Design 5
Overall design 5
Switching module 6
Control module 7
Auxiliary contact units 8
Surge arrester unit 8
Small wiring termination 8
Operation 9
Closing 9
Opening 10
Emergency trip 10
Technical specification 11
General 11
Rated operational power of AC motors (AC�3 and AC�4) 12
Auxiliary circuits 13
“Power supply” 13
“Control Input” 13
Auxiliary contacts unit 13
Surge arresters 14
Electromagnetic Compatibility (EMC) 15
Dielectrical Strength 15
Dimensional drawings 16
Application guide
Selection 17
Incoming inspection 17
Mounting 18
Main terminals connection 19
Wiring and earthing 21
Commissioning test 23
Maintenance 24
Operation test 24
High voltage test 24
Insulation resistance test 24
Contact resistance test 24
Failure analyses and handling 24
Replacement of auxiliary contacts 25
Replacement of surge arresters unit 25
Replacement of control module 25
Routine test 26
Type test 26
Disposal 26
Technical Manual 3
Low voltage vacuum contactors (hereinafter con�
tactor) are based on the latest switching and
electronic control technologies. The contactor
can be used as a core component of low voltage
switchgears and as a stand�along unit. Switching
of heavy�duty AC motors is main intent of the
contactor.
Main distinctive of the contactor’s design is
application of microprocessor�based incorporat�
ed control unit. Light�duty operation instruc�
tions are applied to corresponding input of the
control module. Separate supply input allows
withstanding deep voltage sags without dropout.
This feature has particular importance when
motor’s fed is made from transformers having
comparable with the motor power.
Contactor has three modifications.
LSM/TEL�1�4/400�340 is applied at either of low
voltage AC systems.
LSM/TEL�1�4/400�341 and LSM/TEL�1�4/400�
342 contactors are used for three�phase, four�
wires AC systems 120/208V and 230/400V corre�
spondently. In these types of the contactors
Technical Manual 3Presentation
there is surge arrester unit. Surge arrester unit
provides effective motor protection against
switching overvoltages. It raises service life of
the interconnected electrical equipment.
Contactor has specific main terminals in respect
with the similars contactors. Contactor allows to
be connected with cables without cable lags. If
the cables are provided with extra seals, degree of
protection of the contactor is IP40. It provides
protection from insects and ingress of liquid
drops. However, contactor can be connected by
busbars and cables with lags through extra
adapters. In this case contactor transforms to
ordinary contactor. However application of the
seals provides abovementioned protection of the
contactor.
Contactor has four interchangeable auxiliary
switches which can be used for linking to sig�
nalling circuits.
Application of advanced technologies provides
reliable operation of the contactor during all
service life without extra maintenance and
adjustments that lowers service costs.
Technical Manual
Presentation
Technical Manual 4Product range
Product range
Product type Part number Comment Manufacturer
Module LSM/TEL�1�4/400�340Contactor for up to 1000 V AC systems (witout
surge arresters)�
Module LSM/TEL�1�4/400�341Contactor for 120/208 V AC systems (with
surge arrester unit SAU/TEL�230E)�
Module LSM/TEL�1�4/400�342Contactor for 230/400 V AC systems (with
surge arrester unit SAU/TEL�400E)�
Accessory CM/TEL�20E Control module �
Accessory ACU/TEL�01 Auxiliary contact unit �
Accessory SAU/TEL�230E Surge arrester unit for LSM/TEL�1�4/400�341 �
Accessory АAHE 296444.003 Special key �
Accessory ITEA 674152.003 Screw driver �
Component AAHE 735642.001 Seal MF TEL
Accessory SAU/TEL�400E Surge arrester unit for LSM/TEL�1�4/400�342 �
Accessory SAU/TEL�001E Case of surge arrester unit (without varistors) �
Component AXCA 716212.001 Adapter MF TEL
Component AXCA 745422.017 Installation bar MF TEL
Overall design
Vacuum contactor consists from the following
main parts: switching module, control module,
surge arrester unit and two auxiliary contacts
units. Switching module, control module and
surge arrester unit are realized as polymeric�cov�
ered modules. Auxiliary contacts units are made
as PCB�based modules. Surge arrester unit and
auxiliary contacts units allow to be easily
replaced without any tools.
The contactor provides IP40 degree protection if
it is connected with up to 240 mm2 cables with�
Design
Technical Manual 5Design
out cable lags. The cables are connected directly
to main circuit terminals with special wrench and
are sealed with rubber seals. To connect cables
with lags it is necessary to use special adapters.
If the adapters are used together with rubber
seals degree protection is also provided at IP40
level.
Small wiring termination is provided with WAGO
connector that is placed under a cover. The con�
tactor is earthed through "Earth" stud.
Control module
Cover
"Earth" stud
Seals
Surge arresters unit
Switching module
Main circuit
terminals
(load outputs)
Small wiring
terminals
Auxiliary
contacts unit
Main circuit
terminals
(supply inputs)
Adapters Installation bar
Connection board
Switching module
Switching module consists of three vacuum
interrupters (VI), solenoid actuator, flexible con�
nectors and rigid busbars with clamps.
Vacuum interrupters are a peak of R&D achieve�
ments of Tavrida Electric. Despite small dimen�
sions vacuum interrupters insure reliable switch�
ing of heavy�duty circuits providing high inter�
rupting life.
Vacuum interrupter
In contrast with majority of conventional con�
tactors there is level motion between the actua�
tor and vacuum interrupters. The actuator's
Technical Manual 6Design
armature is rigidly coupled to the frame which
operates to VI’s moving contacts by linear drive
insulators. This provides direct linear movement
in both directions and avoids the use of rotating
shafts, bearings and bell cranks. As a result the
contactor is maintenance and trouble free during
all mechanical life.
The actuator has two end positions: OPEN and
CLOSED. In Open position the armature is forced
by opening spring to provide the gap between
base yoke and armature. To close the actuator it
is necessary to inject the closing current into the
coil. In CLOSED position the gap between base
yoke and armature is miserable. Holding current
that is injected into actuator's coil leads corre�
sponding magnetic flux. The flux produces hold�
ing force between base yoke and armature and
holds the magnetic system in close position.
Tripping of the actuator is provided by holding
current chopping. Position of the actuator is
indicated with internal function auxiliary con�
tact that is connected with control module
through intermediate printed circuit board.
Frame
Actuator coil
Flexible connector
Terminal
Armature
Contact pressure
spring
Opening spring
Basechannel
Guade yoke
Drive insulator
Vacuum interrupter Busbar
Function
auxiliary contact
ClampBase yoke
Bracket
Control module
Microprocessor�based control module transfers
external low�powered control signal into internal
operation instruction which are applied to mag�
netic actuator coil. There are two inputs: "Power
supply" and "Control input". "Power supply"
input is intended for charging of internal closing
capacitor bank and supplying of incorporated
source of holding current. After initial power
application the contactor needs preparation time
to charge the capacitor bank. “Control input” is
intended to accept external close instructions.
Capacitor bank is charged into actuator's coil
and it injects closing current that is independent
from quality of power supply. After closing of
magnetic actuator the control module generates
stabilized holding current into the coil. Then
close instruction is finished the holding current
is chopped and the contactor is tripped. Between
sequences of CO operations the contactor needs
a time for charging of capacitor bank. For indica�
tion of main contact's position.
Control module has internal thermosensor. The
first function of the thermosensor is generation a
signal when inside temperature of control mod�
ule exceeds Overheating Indication Temperature.
It can be caused by overloading of the contactor
or exceeding of internal temperature into
switchgear above level specified as maximum
operating temperature. The second function of
the thermosensor is generation of internal
Emergency Trip Instruction if the temperature
inside control module exceeds Emergency Trip
Temperature. In this case the contactor is tripped
Technical Manual 7Design
and corresponding indicator starts to blink.
Control module has three LED indicators on the
front panel.
Green�color indicator "Power" is intended for sig�
naling of applying of power supply on correspon�
ding inputs and it signals about readiness of the
contactor for execution of closing instruction.
Control module executes monitoring of internal
auxiliary circuits and inside temperature of the
contactor. If some malfunction is occurred red�
color indicator "Malfunction" starts to blink suc�
cessively with intervals. The number of blinks in
series corresponds to specific malfunction.
Duration of single blink is 150 ms. Interval
between neighbour blinks is 450ms. Interval
between series of blinks is 1.5 ms.
Red�color indicator "Closed" reflects position of
the contactor.
Correspondence between modes of the contactor
and indicators is shown in the following table.
Contactor's condition"Malfunction"
Continuous lost of "Power supply" No light
Preparation time for closing No light
Opened state No light
Closed state No light
Lost of "Power supply" and "Control input"1 blink in
series*
Overheating Indication Temperature exceeds specified
level
2 blinks in
series
Opened state after execution of Emergency Trip
Instruction
Nonconformity of the contactor
3 blinks in
series
4, 5 or 6 blinks
in series
"Closed"
No light
No light
No light
Light
**
**
No light
**
* During not less than 30 sec.
** Light � if the contactor is closed; No Light � if the contactor is opened.
"Power"
No light
Blinks
Light
Light
No light
Light
Blinks
Light
LED indication mode
Auxiliary contact units
Contactor is provided with two auxiliary contact
units (ACU). Each unit has one normally opened
(NO) and one normally closed (NC) contacts. The
contacts are controlled by frame of the actuator
They are used for position indication of the con�
tactor for external signalling circuits.
Technical Manual 8Design
Surge arrester unit
Contactors LSM/TEL�1�4/400�341 and LSM/TEL �
1�4/400�342 include SAU/TEL type surge arrester
units. The first contactor is supplied with
SAU/TEL�230 and the second one with SAU/TEL�
400. Each unit include three varistors that are Y�
connected with earthed midpoint. Surge arrester
units are intended for protection of intercon�
nected electrical equipment from overvoltages
that can be occurred at switching operations of
the contactor and other reasons. The units limits
the surge voltage, so, service life of electrical
equipment become higher if the units were not
used.
Contactor LSM/TEL�1�4/400�340 is provided with
case of surge arrester unit. There are no any
varistors inside. So, this unit does not provide
overvoltage protection of the equipment. In this
case protection of equipment shall be arranged
with extra protection elements.
Small wiring termination
Contactor has auxiliary inputs and outputs in
accordance with the diagram nearby.
Outgoing arrows indicate outputs, incoming
arrows indicate inputs.
Potential zones corresponding to electrically iso�
lated terminals are separated with lines.
Auxiliary Contact NC1
Auxiliary Contact NO2
Auxiliary Contact NC2
"Power Supply"
"Control Input"
"Earth"
Auxiliary Contact NO1
Operation
Closing
The initial position of the contactor is open.
Vacuum interrupters are held in opened position
by opening springs which operate to their pulling
insulators through the frame. To launch the con�
tactor into operation it is necessary to energize
corresponding WAGO terminals with "Power sup�
ply" rated voltage. Control module starts charg�
ing of internal closing capacitor bank. "Power"
indicator stars to blink. If preparation time is
over specified value the indicator lights that
means readiness of the contactor for closing.
Contactor can be closed if the following condi�
tions are met:■ Contactor is open;■ “Close” capacitors are charged, LED indicator
“Power” lights continuously.
To close the contactor, control voltage shall be
applied to “Control Input”. In a period longer
than “Close” instruction acceptance time, current
pulse from the closing capacitor bank is injected
into the coil.
The current in the coil produces a magnetic flux
in the gap between the base yoke and the arma�
ture.
1 2 2a 4 4а 653 3aStateof main contacts
Actuator coilcurrent
Travel of armature
Speed of armature
Time
4b
Technical Manual 9Operation
Current increment increases the magnetic flux.
Electromagnetic attraction between yoke
and armature becomes more than restraining
force of the opening springs (line 1).
The armature, frame, drive insulator and moving
contacts start to move. As the armature moves
towards the upper yoke the magnetic air gap
decreases and consequently the magnetic attrac�
tion force increases. This increasing force accel�
erates the armature, drive insulator and moving
contact. Acceleration of the armature generates
back emf in the coil that reduces the coil current
(Line 1�2).
At contact close (line 2) the moving contacts
stops but the armature travel continues for 1 mm
under rapid deceleration caused by compressing
the contact pressure spring.
At the limit of its travel the armature latches
magnetically to the base yoke (Line 2a). The
travel of the armature also compresses the open�
ing spring in preparation for the next opening
operation and operates the auxiliary contacts.
The moving armature collapses and the coil cur�
rent again increases (lines 2a�3).
When closing impulse duration is expired control
module decreases the closing current (line 3) up
to holding current (lines 3a�4). The contactor
stays in closed position for unlimited period of
time even if mechanical vibration conditions and
voltage drops are occurred
Technical Manual 10Operation
Opening
To open the contactor, “Control Input” shall be
de�energized. In a period of time longer than
“Trip” instruction acceptance time, instruction is
accepted and holding current is cut off (line 4�
4b).
Magnetic flux and correspondantly holding force
of the armature decrease and when sum of
charged opening and the contact pressure spring
forces become more then holding force the arma�
ture is released and accelerated rapidly (line 4a).
After free travel it engages with drive insulators
and VI’s contact are opened.
The peak force produced by the armature ensures
easy breaking of any micro�welds at the contact
surfaces which can appear due to short circuit
current action.
The moving contact accelerates rapidly, ensuring
a high interrupting capacity. Main contacts
return to their initial position (line 5).
If the contactor breakes loaded circuit the inter�
rupting current initiates a so�called «vacuum
arc» that burns essentially in plasma originating
from evaporated contact material. The current
continues to flow through this plasma until a cur�
rent zero. At this moment the arc is extinguished
and transient recovery voltage appears across the
open gap. If the contact surface is locally over�
heated it produces a lot of vapour, resulting in
deterioration of the vacuum followed by electri�
cal breakdown. To avoid this, optimum combina�
tion of contact material and electrode shape is
applied resulting in development the smallest
vacuum interrupter ever existed.
At full travel (line 6) the armature, drive insula�
tor and moving contact assembly is again held
open by the opening spring force.
Contactor is also opened at the same way if
“Power Supply” is lost in approximately 1 second
even if “Control Input” is energized.
In this case, to close contactor it is necessary to
de�energize “Control Input”, to apply “Power
Supply”, to energize “Control Input” when
“Power” indicator is lit.
Emergency trip
If inside temperature of the control module
exceeds level of Emergency trip temperature the
contactor trips itself even if "Control Input" volt�
age is applied. To close the contactor it is neces�
sary to remove closing instruction and apply it
once more after than the temperature downs less
than Overheating indication temperature and
elimination of overheating reason.
Technical specification
General
Technical Manual 11Technical specification
Rated voltage, V
LSM/TEL�1�4/400�340 1000
LSM/TEL�1�4/400�341 230
LSM/TEL�1�4/400�342 400
Rated frequency, Hz 50, 60
Conventional thermal curent, A 400
Rated breaking capacity, kA 4
Rated making capacity, kA 4
Rated over current capacity, 10s, kA 3.2
Mechanical life, CO operations 2 000 000
Operational frequency, CO operations per hour
� mechanical 600
� AC�1 600
� AC�3 500
� AC�4 300
Switching capacity, CO operations
� at rated current 2 000 000
� at breaking current 50
� at other currents see diagram
Closing time, ms, not more than 50
Drop out time, ms, not more than 60
Opening time, ms, not more than 80
* According IEC 60068�1�88 (C� Damp heat (steady state); D � Damp heat (cyclic).
** IP00 at flat strip conductor or busbar connection.
*** According IEC 60721�3�4.
Applicable standards:IEC 947�4�1�90
Overheating Indication Temperature, °C 70±3
Emergency Trip Temperature, °C 80±3
Main contact resistance, microOhm 90
Current heat loss, at 400A, w 50
Ambient air temperature
� enclosed, °C �40...+40
� open, °C �40...+55
� storage, °C �40...+60
Climatic proofing C, D*
Maximum altitude above sea level, m 2000
Degree of protection IP40 (IP00)**
Mechanical vibration withstand capacity Class 3M4 (IEC 721�3�4)***
� stationary vibration, sinusoidal, g 1
� non�stationary vibration, shock, g 10
Weight, kg, not more than 10,0
Technical Manual 12Technical specification
10000
4000
1000
100
10
10 100 1000 10000 100000 1000000
1
Cu
rre
nt,
А
Interrupting life, operations
Rated operational power of AC motors (AC�3 and AC�4)
Rated voltage, VRated operational power, kW
LSM/TEL�1�4/400�340 LSM/TEL�1�4/400�341 LSM/TEL�1�4/400�342
220 125 125 125
230 130 130 130
240 135 135 135
380 200 � 200
400 220 � 220
415 240 � 240
440 255 � �
500 290 � �
Switching capacity
660 340 � �
690 360 � �
1000 500 � �
Auxiliary circuits
“Power supply”
Technical Manual 13Technical specification
Power supply rated voltage, V AC 220
Operating range, V AC 187�242
Power consumption, VA, not more than
� during preparation time (charging of closing
capacitor)35
� in opened position 8
� in closed position 15
Preparation time, s, not more than
� after initial power application 10
� after previous open operation 5.5
“Control Input”
Control input rated voltage, V AC 220
Operating range, V AC, 44�242
Minimum accepted level of close instruction,
V AC, not less than132
Minimum holding level of close instruction,
V AC, not less than88
Maximum accepted level of trip instruction,
V AC, not more than44
"Close" instruction acceptance time, ms, not
more than30
Auxiliary contact units
Maximum operating voltage, V (AC&DC) 400
Rated voltage, V (AC&DC) 250
Breaking capacity (AC, cos=0.8), VA 750
Maximum carrying current, A 10
Minimum switching current, A (AC&DC) 0.1
Dielectric strength, VDC 750
Interrupting life at maximum breaking cur�
rent, C�O cycles50 000
Mechanical life, C�O cycles 1 000 000
Maximum withstand voltage, V, peak 420
"Trip" instruction acceptance time, ms, not
more than30
Surge arresters
Technical Manual 14Technical specification
Type Rated Voltage , V ACSurge Current, A
(8/20 m s)Energy Absorption, J
(2 ms)Average PowerDissipation, W
SAU230 220, 230, 240 8000 100 1,0
SAU400 380, 400, 415 8000 135 1,0
2000
1000
01E�3 0,01 0,1 1 10 100
SAU400
SAU230
Vo
ltag
e, V
Current, A
Impulse duration, m s
Maxi
mu
m s
urg
e c
urr
en
t, A
Derating curves of different SAU are shown
below.
Voltage�current characteristics of different SAU
are shown below
Electromagnetic Compatibility (EMC)
Technical Manual 15Technical specification
Dielectrical Strength
Power frequency voltage
� between main contacts 3,5 kV
� between main contacts and auxiliary circuits 3,5 kV
� between auxiliary circuits 2,0 kV
Lighting impulse 1,2 m s/50 ms/0,5 J
� between main contacts 8,0 kV
� between main contacts and auxiliary circuits 8,0 kV
� between auxiliary circuits and “Earth” 4,0 kV
Insulation resistance between isolated
potentional zones at 500 VDC, not less than5,0 MOhm
� between isolated auxiliary circuits 4,0 kV
� between NO and NC of ACU 4,0 kV
ParameterImmunity criteriain accordance with
IEC 60947�4�1
Electrical fast transient/burst immunity in accordance
with IEC 61000�4�4:
� for "Power supply A
"for "Control input" A
Characterizations
�
�
Surge immunity in accordance with IEC 61000�4�5B
B
Power frequency magnetic field immunity in accordance
with IEC 61000�4�8
A
A
Pulse magnetic field immunity in accordance with IEC
61000�4�9A
Damped oscillatory magnetic field immunity in accordance
with IEC 61000�4�10A
common 4 kV
differential 2 kV
100 A/m
1000 A/m
1000 A/m
0,1 and 1 MHz �
� 100 A/m
Level
4
4
4
3
5
5
5
Voltage dips, short interruptions and voltage variations
immunity in accordance with IEC 61000�4�115 � A
Oscillatory waves immunity in accordance with IEC 61000�
4�12 taking into account IEC 255�22�13
1 MHz, 0,1 MHz
2 kVA
Electrostatic discharge immunity inaccordance with IEC
61000�4�23 � A
Dimensional drawings
Technical Manual 16Dimensional drawings
Application Guide 17Selection � Incoming inspection
Application guide
Selection
Selection of the contactor is made in accordance
with following table:
Type AC System Rated voltage, V AC
LSM/TEL�1�4/400�340Three�phase, three�wire or
four�wire systemsup to 1000
LSM/TEL�1�4/400�341Three�phase,
four�wire systems220, 230, 240
LSM/TEL�1�4/400�342Three�phase,
four�wire systems380, 400, 415
Incoming inspection
Each contactor before installation shall be sub�
jected under physical control.
Inspection shall be made in accordance with the
table below.
If contactor’s appearance has any nonconformi�
tyes customer has to made a decision in respect
with application of the contactor.
In any cases customer shall arrange activity in
accordance with Complaints handling procedure.
Conformity criteriaInspection
Absence of severe damages resulted from:
� product drops
� excessive moistening of package
� package deformation caused by external impacts
� excessive external load applied to package
Compliance of box label to order dataAbsence of undamaged seals
Packaging
Absence of undamaged seals
Absence of mechanical damages, scratches and colored spots
Sealing
Plastic parts
Absence of mechanical damages, scratches and corrosion on painted
surfaces and galvanized terminals.Metal parts
Mounting
The contactor can be installed directly on low
voltage switchgear's panel or through extra
installation bars AXCA745422.017 The last way is
used if there is no access from the back side of
low voltage switchgear panel.
Application Guide 18Mounting
Each contactor is provided with paper template
to make marking on switchgear's panel.
Mounting holes, required fasteners and torques
are shown below.
4 holes �7
8 holes �3.2
168±0.2
210±0.2
15
5±
0.2
11
5±
0.2
40
±0
.2
15
5±
0.2
*
4 Screws M6х20
4 Spring Washers
4 Washers
Torque 10 N.m
1...4
8 Screws 4,2
8 Washers
168±0.2
210±0.5
235
2 holes �7 5
40
2
10
50
* � for 1..2 mm thickness of the panel, f3.7 mm � if thickness is more than 2 mm
Application Guide 19Main terminals connection
Primary connections to the contactor shall be
made using unprepared copper* or aluminum
cables which types and sizes are shown below.
�3
4
�3
0
�2
4
�1
7
Lin
e 1
Lin
e 2
Lin
e 3
�1
1
Cablecross�section,
mm2
50
70
95
120
150
185
240
Cutting line
Conductor of3–phase cable
�
1
1
1
1
2
2
Conductor of1–phase cable
1
1
1
2
2
2
3
Main terminals connection
■ Third step � cut seals at appropriate size
■ Fourth step � fit seal on cables
■ Fifth step � fix cables with special key tightly
Attention: The load shall be connected to termi�
nals near surge arrester unit
■ Sixth step � fit seals on the contactor
Conductor
sectional stranded core
sectional solid core
round stranded core
round solid core
Cross�section
mm2
70 � 240
95 � 300
50 � 185
70 � 240
AWG
00 � 500
000 � 600
0 � 350
00 � 500
Connecting cables shall be inserted through rub�
ber seals as the figure below. The seals shall be
cut in accordance with the diameter of cable in
accordance with the table below.
■ First step � cut cable isolation at 30 mm length
* Note: Cupper cables shall be tinned
■ Second step � find cutting line of seal in accor�
dance with the following table and outline
Application Guide 20Main terminals connection
To provide connection with busbars or cables
with lags additional adapters shall be used.
Sequence of connection is shown below.
■ First step � cut seals at appropriate size
■ Second step � fit seals over adapters
■ Third step �fix cables with special key tightly
■ Fourth step � fit seals on the contactor
■ Fifth step � connect cables
Attention: If prospective short�circuit current of
the circuit exceeds of rated parameters of the con�
tactor extra short�circuit protective device (SCPD)
shall be connected seriously. SCPD shall provide
over�current discrimination between contactor and
short�circuit currents.
Application Guide 21Wiring and earthing
Terminal Designation
1 “Control Input” (1)
2 “Control Input” (2)
3 Free
4 “Power Supply” (1)
5 “Power Supply” (2)
Wiring and earthing
The contactor shall be earthed through M5 stud.
The "Earth" stud shall be connected with not less
than 2.5 mm2 wire that is tagged with 5 mm diam�
eter lag.
To connect "Power Supply", "Control Input", aux�
iliary contacts and "Earth" circuits push the
clamp of the cover and move it towards the
arrow.
Connection is made through WAGO connector’s
"Power Supply" and "Control Input" terminals.
The circuits are connected with (0.5�1.5) mm2
single�core or multi�core wires. The insulation of
the wires shall be reared on 6�10 mm. Connection
is made with special screw that is included in
delivery set.
Application Guide 22Wiring and earthing
DesignationTerminal
“Auxiliary contact (1)” (NO)1
“Auxiliary contact (1)” (NO)
“Auxiliary contact (2)” (NC)
2
3
“Auxiliary contact (2)” (NC)4
Wires of auxiliary contacts with “Power supply”,
“Control input” and “Earth” wires are placed
together and are fixed by strips. The cover has
four plugs, so the plug (or two plugs if necessary)
shall be broken with pliers and sharp edges on
the cover shall be smoothed with knife or round
file. To place the cover it is necessary to align
joggles on the cover and corresponding holes in
the switching module and to clamp the cover.
Auxiliary contacts connection
Terminals of auxiliary contact units are not
numerated. The order of the terminal corre�
sponds to the following figure.
Commissioning test
Before beginning of application each contactor
shall be subjected to the following commission�
ing tests:
Operation test
Application Guide 23Commission test
Action Expected reaction
Apply supply voltage to 4 and 5 terminals
� contactor shall open
� "Power" LED shall light
� "Malfunction” LED shall not light
� "Closed” LED shall not light
� contacts 3 and 4 of ACU shall close
� contacts 1 and 2 of ACU shall open
Apply control voltage to 1 and 2 terminals
� contactor shall close
� "Power" LED shall light
� "Malfunction” LED shall not light
� "Closed" LED shall light
� contacts 3 and 4 of ACU shall open
� contacts 1 and 2 of ACU shall close
Switch off control voltage from 1 and 2 ter�
minals
� contactor shall open
� "Power" LED shall light
� "Malfunction” LED shall not light
� "Closed" LED shall not light
� contacts 3 and 4 of ACU shall close
� contacts 1 and 2 of ACU shall open
Apply control control voltage to 1 and 2 ter�
minals
� contactor shall close
� "Power" LED shall light
� "Malfunction” LED shall not light
� "Closed" LED shall light
� contacts 3 and 4 of ACU shall open
� contacts 1 and 2 of ACU shall close
Switch off supply voltage from 4 and 5 ter�
minals
� contactor shall open
� "Power" LED shall not light (in 5 seconds)
� "Malfunction” LED shall not light
� "Closed" LED shall not light
� contacts 3 and 4 of ACU shall close
� contacts 1 and 2 of ACU shall open
Switch off control voltage from 1 and 2 ter�
minalsNo reaction
High voltage test
Use standard method (IEC 947�4�1) to check
insulation level.
Insulation resistance test
Use standard methods to check the insulation
resistance of the auxiliary insulation. It shall not
be below the limits given in the contactor tech�
nical specification.
Main contact resistance test
Use standard methods to check resistance of the
main contacts of the contactor. Values must not
exceed limits specified in the contactor technical
specification.
Application Guide 24Maintenance
Maintenance
The contactor is inherently maintenance free.
However, if customer has periodical test proce�
dure the contactor can be subjected under fol�
lowing commissioning tests. If some nonconfor�
mity is found the contactor shall be handled as
described in subsection Failure analisys and han�
dling (see below).
Operation test
The contactor shall be operable as pointed in the
chapter above.
High voltage test
Dielectric strength of vacuum interrupters and
support insulation in respect to power frequency
withstandability shall not deteriorate in service.
During the test, apply voltages as pointed in sub�
section Dielectrical strength. However, impulse
withstandability of vacuum interrupters can
decrease in service. So, producer specifies light
impulse withstandability on 5 kV level for inter�
rupters. Impulse withstandability of support
insulation shall be the same as for a new contac�
tor.
Insulation resistance test
The insulation resistance shall comply with value
that is pointed in subsection Dielectrical strength.
In the case of noncompliance try
to find the “weak point”. Note that, generally,
other devices can be installed in parallel to the
contactor.
Contact resistance test
If contactor has contact resistance which
exceeds the specified limit but it is less than
twice this limit, continuation of use is possible, if
the actual continuous current does not exceed
the following value:
where:
Ia, Ra � actual current and current resistance
respectively,
Rr � rated contact resistance,
Ir � rated current or conventional enclosed ther�
mal current,
Ia<Ir√Rr ,Ra
___
Failure analyses and handling
If any nonconformity during commissioning
tests, maintenance or in service is occurred the
contactor shall be handled in accordance with
the following table.
Nonconformity "Malfunction" LED mode
The contactor is not operatable,
"Power" LED indicator is not lightedUnspecified
The contactor is in close position,
"Closed" LED indicator is not lightedUnspecified
The contactor is in open position,
"Closed" LED indicator lightsUnspecified
Nonconformity of auxiliary contact
Failure of surge arrester unit
Unspecified
Supply voltage is less than permissible limit 1 Blink
Other nonconformities of the module 4, 5 or 6 successive blinks
Failure of High voltage test Unspecified
Failure of Insulation resistance test Unspecified
Unspecified
Failure of Contact resistance test Unspecified
Recommended action
Check and correct power supply voltage
If the voltage is in rate � replace control module
Replace contactor
Replace contactor
Replace ACU
Check and correct power supply voltage
Replace the contactor
Replace the contactor
Replace the contactor
Replace surge arrester unit
Replace the contactor
In any cases customer shall arrange activity in
accordance with Complaints handling procedure.
Replacement of auxiliary contacts
The auxiliary contacts units are maintenance
free. However, if damage of auxiliary contact
occurs under any circumstances the unit can be
replace as follows.
ATTENTION: Contactor shall be open before
replacement of auxiliary switches.■ Take off the cover;■ Press to auxiliary contact block’s slot and draw
out the block;■ Insert a new ACU/TEL�01;■ Install the cover.
Application Guide 25Failure analyses and handling
Replacement of surge arresters unit
Order of SAU/TEL replacement is as follows.■ Press upwards to surge arresters unit’s flanges
with two hands simultaneously.■ Install a new unit that corresponds to rated volt�
age of the system.
Replacing of control module
Attention: The contactor shall be competelly
powered down.
Order of control module’s replacement
is as follows:
■ Take off the cover
■ Remove surge arrester unit
■ Screw off four captive screws at connection
board
■ Disconnect connection board
■ Disconnect earthing wire from the control
module
■ Screw off four captive screws at control module
■ Remove the failed module
■ Install new control module in inverse sequence
■ Perform operation test
Application Guide 26Routine test � Type test � Disposal
Type tests
Type tests shall be arranged in accordance with
the following table.
Where:
NL � no limitations: supervisory from test lab is
not required
Type test Type test features
Dielectric testsTEL
Temperature rise testsNL
Making and breaking testsNL
Short�time withstand current testsNL
Mechanical life testsNL
Measurement of resistance of the main circuitNL
Standard
IEC 947�4�1�90
IEC 947�4�1�90
IEC 947�4�1�90
IEC 947�4�1�90
IEC 947�4�1�90
IEC 947�4�1�90
TELGOST 30011�96
NLGOST 30011�96
NLGOST 30011�96
NLGOST 30011�96
NLGOST 30011�96
NLGOST 30011�96
Test Conformity criteria
Design and visual checks
� correctness of nameplate data
� compliance of the module type to order
� absence of mechanical damages, scratches, colour variations affecting
module appearance
Mechanical operation tests
(1000 CO operations at rated operating voltage)
� proper operation of main and auxiliary contacts
� compliance of the closing and opening times with the requirements of
technical specification
� absence of contact bounce
Power frequency voltage withstand of the main cir�
cuits (between open contacts)� absence of breakdowns inside vacuum interrupter
Power frequency voltage withstand of the auxiliary
circuits (between terminals and earth)� absence of breakdowns
Routine test
Each contactor before delivery shall be subjected
to the following routine test procedure.
Malfunction to meet any of the above�mentioned
requirements means failure to pass routine test
procedure
TEL � supervisory from TEL is required. It includes
approval of the test program, order and prepara�
tion of test samples and possible participation at
tests with test lab of Tavrida Electric.
Disposal
Modules do not contain any materials that are
hazardous for environment or personnel. No spe�
cial methods of disposal are required.
Attention:
Only electronic version of this document distributed through designated channels to designated users can
be considered valid.
List of changes
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