ELECTRICAL DISTRIBUTION EQUIPMENT
55 years of experience in design and manufacture
Headquarters building
Switchgear assembly workshop
KAMP assembly workshop
ABOUT COMPANY
The main activity field of ELGA UAB since the very foundation has been
the design and manufacture of electrical equipment for distribution
networks and industry.
Today it is the biggest manufacturer of distribution equipment and
systems in the Baltic States. The continuous introduction of new design
and production technology in the company guaranties the high
production quality conforming to the world standards.
·
Production area - 16 000 square meters
·
Number of employees: more than 350 people
·
Full service, from initial planning and design through to
manufacture, installation and commissioning
·
17800 transformer substations, 41200 medium voltage switchgear
cubicles, 89900 low voltage switchboard panels are in operation
today
ACTIVITY FIELDS
PRODUCTION OF ELECTRICAL DISTRIBUTION EQUIPMENT
·
Steel and concrete type transformer substations for transformers up
to 4x2500 kVA
·
Medium voltage switchgear with load break switches and circuit
breakers
·
Low voltage distribution equipment
·
Automatic compensation equipment
·
Medium voltage outdoor disconnectors
·
Metering and control boards
PRODUCTION OF STEEL STRUCTURES
·
Design and production of steel structures
·
Hot galvanisation of steel structures
·
Hot galvanised outdoor steel structures of high and low voltage
Distribution board assembly workshop
Hot dip galvanizing workshop
EXPORT TO 25 COUNTRIES
CONTENTS
Sweden
Finland
Norway
Denmark
Belgium
Portugal
Iceland
Greece
Latvia
Estonia
Russia
Australia
Kazakhstan
Tajikistan
Jordan
Iran
Syria
Egypt
Mongolia
Vietnam
Brazil
S. Arabia
Nicaragua
Gambia
Lebanon
USN 100 series - 12 kV metal-enclosed type switchgear .............
Metal processing workshop
USN 150 series - 12…24 kV metal-clad type switchgear .............
NOLA arc protection system .........................................................
UNIFLUORC metal-enclosed type switchgear .............................
SI-04 low voltage switchboards ....................................................
MT transformer substations ..........................................................
KAMP prefabricated substation building .......................................
LSP medium voltage outdoor disconnectors ................................
100 series
12 kV METAL - ENCLOSED TYPE SWITCHGEAR
MAIN CHARACTERISTICS
·
Type tested according IEC62271-200
·
Construction of two (three - optionally) high voltage compartments
with draw-out circuit breaker
·
Make-type earthing switch
·
One side maitenance
·
Complete air insulation of all switchboard live parts
·
IP4X degree of protection on the external housing
·
Constructed to withstand the overpressures caused by the internal
arc up to 25kA/1s
·
Busbar segregation shutters activated automatically by circuit
breaker movement inside the compartment. Optional lower contact
segregation shutters to reach LSC2B category.
·
HV doors mechanical interlock ensures secure maintenance
·
Very small overall dimensions (minimal height - 1800 mm with lowest
dimension of LV compartment)
TECHNICAL DATA
Rated operating voltage
Test voltage (50-60) Hz, 1 min
U, kV
U(1 min), kV
12
28 (42)
Rated main busbar current
U, kV
In, A
Rated short time withstand current
Icw(3s), kA
16; 20; 25
Peak current
Icm, kA
40; 50; 63
Impulse withstand voltage (1,2-50) µs
Loss of service continuity category (IEC 62271-200)
75
630;1000;1250
LSC2A (Standard)
LSC2B (Option)
SIMPLE AND SOLID DESIGN
1) optional partition between circuit breaker and cable
compartment
2) optional lower contact segregation shutters
SION (Siemens), VD4 (ABB) or ISM/TEL (Tavrida Electric) vacuum
·
circuit-breakers on draw-out element (cassette type)
·
The torsionally rigid housing with high corrosion resistance
·
Especially compact construction suitable for retrofitting old cubicles
·
Simple inspection and maintenance, thanks to easy access to the
apparatus in the various compartments through doors or easily
removable panels and the possibility of isolating and removing the
circuit breaker
CIRCUIT BREAKERS
USN-10/100 cubicles are equipped with SION
(Siemens), VD4 (ABB) or ISM/TEL (Tavrida
Electric) vacuum circuit breakers (by choice of the
customer).
SWITCHGEAR CUBICLE TYPES
Circuit breaker cubicle
(USN-10SI-01/100x065)
Section disconnector cubicle
(USN-10SS-61/100x065)
Voltage transformer cubicle
(USN-10IT-47/100x065)
MAIN CIRCUIT BREAKER CHARACTERISTICS:
·
Draw-out
version with front operated
mechanism
·
Operating mechanism with charged spring
operated drive (SION, VD4) or with magnetic
actuator operated drive (ISM/TEL)
·
Maintenance free with 30 000 (SION, VD4) or
50 000 (ISM/TEL) mechanical operations
·
Top quality vacuum interrupters
Service transformer cubicle
(USN-10SR-17/100x080)
Load break switch cubicle
(USN-10GS-73/100x050)
150 series
12...24 kV METAL-CLAD TYPE SWITCHGEAR
MAIN CHARACTERISTICS
·
Construction of three high voltage
compartments with draw-out circuit
breakers
·
Type tested according IEC62271-200
·
Designed for high power regional substation
switchgears
·
Make-type earthing switch
·
One side maitenance
·
Operation of all switching devices with front
door closed
·
Complete air insulation of all switchboard
live parts
·
IP41 degree of protection on the external
housing
·
Constructed to withstand the overpressures
caused by the internal arc up to 50kA/1s
·
Mechanical outside door interlock ensures
safe maintenance
TECHNICAL DATA
U, kV
U(1 min), kV
12
17,5
24
28 (42)
42
50
U, kV
In, A
75
95
125
Rated main busbar current
up to 6000
up to 3150
up to 3150*
Rated feeder current
In, A
up to 4000
up to 3150
up to 3150*
Rated short time withstand current
Icw(3s), kA
up to 50
up to 40
up to 31,5
Icm, kA
up to 125
up to 105
up to 80
Rated operating voltage
Test voltage (50-60) Hz, 1 min
Impulse withstand voltage (1,2-50) µs
Peak current
Loss of service continuity category
LSC2B
LSC2B
LSC2B
Partition class
PM
PM
PM
Internal arc classification
AFLR
AFLR
AFLR
Richter scale - 7, MSK scale - IX
Seismic classification according IEC 60068-3-3
Dimensions
Height, mm
Width, mm
Depth, mm
2220
2220
2240
650; 800; 1000
650; 800; 1000
800; 1000
1500
1500
1700
CUBICLE STRUCTURE
The torsionally rigid housings of the cubicles are made of 2.0…3.0
mm thickness galvanized steel sheets folded at the edges and
bolted together.
With the selection of high quality materials, special surface
treatment and powder painting, the conditions for high impact and
corrosion resistance are fulfilled. Special labyrinth construction of
panel's side elements and doors ensure personnel safety against
arc faults.
Switchboards can be fixed to the special foundation, using
anchoring bolts above cable ducts.
PROTECTION AGAINST INTERNAL ARC
UAB "ELGA" switchboards are designed in compliance with the
prescription of the IEC602271-200 Standard and ensure
maximum personnel safety even under internal arc conditions.
In fact, the switchboards are constructed to withstand the
overpressures caused by the internal arc and are fitted with ducts
to guide the exhaust gases so that there is no damage to operators
or to the rooms.
On request, the UAB "ELGA" switchboards are fitted with an
optical arc protection system with sensors in the various
compartments (see page 12 “NOLA arc protection system”).
TYPE TESTING
Sophisticated tests are performed at an accredited European
power laboratories (KEMA, IPH, CESI, IEL).
12...24 kV METAL-CLAD TYPE SWITCHGEAR
BUSBAR COMPARTMENT
The busbar system for currents up to 6000A (12kV) is made of flat copper bars covered with
insulating material (for 17,5kV and 24kV). Busbar compartment as well as circuit breaker and
cable compartments has an exhaust channel to let out overpressured hot gases in the case of a
fault.
On request, busbar compartments between two adjacent cubicles can be separated by special
cast resin bushings.
CABLE COMPARTMENT
Access to the cable compartment is from the front side. It is very easy to reach cable area, due
to the compact design of busbar and circuit breaker compartments. Up to 45% of switchgear
panel volume can be used as the cable termination compartment. A connection of 6 parallel
cables per phase does not provide any problem, since the horizontal partition between the
cable termination compartment and circuit breaker compartment can be removed.
USN switchboards are fitted with a fault making earthing switch mounted in the cable
compartment, to connect the busbar, incoming or outgoing cables to earth. The earthing switch
is controlled from the front of the switchboard by means of manual or motor (on request)
operation. Electromechanical interlocks can link switch operation to other switching device in
the substation or to lack of voltage in the cable.
LOW VOLTAGE COMPARTMENT
Low voltage compartment is positioned and manufactured in double steel plate system to have low
voltage instruments well protected against the effects of short circuit currents from the primary
compartments. The auxiliary circuits of the circuit breaker are automatically connected by means of a
specially designed multipole connector, which is operated during circuit breaker sliding-in.
CIRCUIT BREAKER COMPARTMENT
Standardized construction of draw-out element allows integration of SF6 gas or vacuum circuit breakers
from major worldwide suppliers.
12...24 kV METAL-CLAD TYPE SWITCHGEAR
SWITCHGEAR CUBICLE TYPES 12 (17,5) kV
Circuit breaker cubicle
Voltage transformer cubicle
Service transformer cubicle
Section disconnector cubicle
Load break switch cubicle
SWITCHGEAR CUBICLE TYPES 24 kV
Circuit breaker cubicle with
withdrawable VT truck
Sectionalizing cubicle with metering
Voltage transformer cubicle
Outgoing circuit breaker cubicle
ARC PROTECTION SYSTEM
MAIN CHARACTERICTICS
The new arc protection relay NOLA-03-M with
extension unit NOLA-02-S are designed to be
used for the protection of medium and lowvoltage switchgear to increase personnel
safety and minimize equipment damage. The
central unit type NOLA-03-M operates
independently or together with the extension
unit NOLA-02-S. This unit helps to create
selective arc protection system increasing
number of sensors and extending the area to
be protected.
TECHNICAL DATA
Optical sensor
Current inputs
Rated current
Triggering current setting step
Max triggering current
Short time current for 1s
Rated frequency
Outputs
Contacts HSO1 ir HSO2:
Rated voltage
Continuous carry
Make and carry for 0.5 s
Time constant
Contacts TRIP, TRIP DEL, IRF:
Rated voltage
Continuous carry
Breaking capacity
Time constant
Inputs
RESET, TRIP MON:
Logical 1
Logical 0
Uaux (Power Supply)
Optical fiber
Max length
Cable type
Core diameter
RS-485 link
Max cable length
Cable type
Optical link
Max cable length
Cable type
Core diameter
Jacket diameter
Standards
1A / 5A
0.1A / 0.5A
5A / 25A
500A
50 / 60 Hz
24…260 V dc/ac
3A
10 A
<2.5ms
260 V dc/ac
3A
60W, 125VA
<10ms
≥ 24...260 V dc /ac
≤12 V dc/ac
110 - 260 V dc/ ac,
48 - 110 V dc/ac
50 m
Plastic optical fiber,
not jacketed
1 mm
60 m
Ethernet, shielded
100 m
Plastic optical fiber,
polyethylene jacketed
1 mm
2.2 mm
IEC60255-5,
IEC60255-11,
IEC60255-22,
EN61000 (3/4/5/6),
EN60529:1999
FEATURES
SELECTIVE
ARC
PROTECTION
SYSTEM
Ÿ
Three-phase overcurrent
function - as additional
criteria for trip decision
Ÿ
Loop-type fiber arc sensor
for arc detection and light
intensity measuring
Ÿ
Two high-speed
semiconductor outputs for
fast tripping (<=2,5 ms),
much faster than
conventional protection
relays
Ÿ
Two relay outputs for trip
signalization and circuit
breaker failure protection
Ÿ
Two fiber optic or RS-485
interfaces for the connection
of other Master or slave
units (up to 16)
Ÿ
5 push-button membrane
keyboard for local
configuration
Ÿ
Informative OLED display
and 9 LED indicators for
reliable information
presenting even at low
temperatures
Ÿ
USB port for PC
configuration, event
evaluation and software
upgrade
Ÿ
Event logs (650 events) and
real-time clock
Fault clearing
time by
NOLA
Ÿ
Configured by the FREE
NOLASET software tool
Steel
fire
and monitoring of sensor
fibers, operating voltages
and cabling between master
units and slave units
faulted feeder (with NOLA02-S)
Upper flap
opening in
switchgear
cubicle
NOLA trip
signal
Ÿ
Continuous self-supervision
Ÿ
Selective tripping of the
Fault clearing time
by conventional
protection
relays
Cable
fire
0
2,5 ms
100 ms
200 ms
400 ms
Arc duration and resulting damage
500 ms
METAL-ENCLOSED TYPE SWTCHGEAR
MAIN CHARACTERISTICS
·
Semi metal-clad, type tested according IEC
·
Operation of all switching devices with front
door closed, one side maintenance
·
IP3X degree of protection on the external
housing
·
Constructed to withstand the overpressures
caused by the internal arc
·
Segregation of busbar and cable
compartments by switch-disconnectors
stainless steel structure
·
The system overall dimensions are reduced to
a minimum without effecting personnel safety
FUNCTIONAL FEATURES
·
The torsionally rigid housing with very high corrosion
resistance
·
Every cubicle is equipped with a mimic layout reproducing
its single line diagram
·
All the cubicles are equipped with a main earthing busbar
·
On the switch-disconnector type FLUORC there is an
inspection window suitably sized to permit the visual
inspection of main contact isolation and of earthing contacts
position
·
The cubicle is made of a galvanized steel sheet
·
Unifluorc cubicles type VS, VS/A and VS/R are equipped
with FLUVAC type vacuum circuit breaker combined with
SF6 disconnector in one stainless steel enclosure
·
The particular construction of the switch-disconnector
stainless steel housing prevents any surface current flow
through the insulators or joints
TECHNICAL DATA
Rated insulation voltage
Test voltage (50-60) Hz, 1 min
U, kV
U(1 min), kV
Impulse withstand voltage (1,2-50) µs U, kV
In, A
Rated main busbar current
12
24
42
50
75
125
400
400
630
630
1000
Rated short time withstand current
Peak current
Icw(3s), kA
Icm, kA
12,5
12,5
16
16
20
20
31,5
31,5
40
40
50
50
STANDARD DIAGRAMS
1 - Switch disconnector FLUORC
operating mechanism
2 - L.V. compartment
3 - Stainless steel enclosure
4 - Bus-bar set extensible to
successive unit
5 - Cable compartment front door
accessible
6 - Earthing bar
LOW VOLTAGE SWITCHBOARD
MAIN CHARACTERISTICS
Low voltage distribution equipment designed for 0,4kV
electric power distribution from main switchboards to
small distribution boards. Low voltage switchboards SI-04
are used in AC 50Hz, 400/230V networks. Switchgear
(switch-fuse units, circuit breakers or switching devices of
both types) are selected according to order and designed
to protect the lines attached to these devices from short
circuits, overloads and unacceptable other emergency
modes.
Modular 0,4kV distribution system SI-04 allows quickly
produce any configuration:
·
Main switchboards
·
Distribution boards
·
Automatic capacitor banks
·
Motor control centres
·
Busbar trunking systems
·
Transit cable boards
·
Lead-in metering boards
With this modular system we can offer one side or two
sides operation switchboards, realize any electrical
diagrams. We can design and produce equipment
according to customer needs, depending on setting
place, connection variety and service personal safety.
TECHNICAL DATA
Rated voltage
Rated current
Rated short-time withstand current
Rated peak withstand current
Rated frequency
Rated insulation voltage
Impulse withstand voltage
Standards
Busbar system
Degree of protection
Ue 690V, AC; 750V, DC
In up to 6300A
Icw (1s) up to 100kA
Ipk up to 220kA
50 Hz
1000 V, 50 Hz
Uimp 12 kV
IEC 61439
L1, L2, L3, N; PE
From IP00 to IP55
SWITCHING DEVICES
Standardized construction of low voltage switchboard SI-04 allows integration of switching devices
from major worldwide suppliers.
CONSTRUCTION
SI-04 is extremely flexible low voltage switchgear system. It is assembled of separate modules.
Modules are based on a framework construction, which can be equipped with standardized
components and can be adapted to each application.
The self supporting structure and any internal partitions or barriers are made of corrosion-proof
hot-dip galvanized sheet steel. All external enclosure elements are also powder painted in
standard colour RAL7035 (other colours – on special request). The supporting structure is
assembled using rivets and bolts.
Internal barriers and partitions complete the basic structure for realized internal separations and
divide the section into compartments or subsections.
The busbar system is situated on the rear part of the switchboard and consists of one or more
parallel copper bars attached to the supporting structure by insulated supports and it is suitably
designed so as to withstand the rated current and thermal and dynamic stresses caused by a shortcircuit current.
The power and control cables can be entered through the bottom, top or back side of panels.
TRANSFORMER SUBSTATIONS
MAIN CHARACTERISTICS
More then 40 years of experience in development and
production of transformer substation housings
ensures that we will be able to offer a perfect solution
for your electrical distribution networks. Substations
are available in three main housing types - galvanized
steel (MT), concrete (BKT) and frame module design
(MKT) with indoor or outdoor service and with
installed required number of medium voltage and low
voltage panels. The electrical diagram and
arrangement of the equipment in the transformer
substation are to be settled when making an order.
MAIN ADVANTAGES:
Convenient arrangement and large choice of equipment
·
High versatility in external design
·
Up-to date and solid sturdy design
·
Internal arc type tested up to 20kA/1s
·
Possible replacement of the housing modules
·
Low dimensions
·
Installed transformers up to 4x2500kVA
·
2 mm thickness zinc coated sheet steel housing,
·
Powder painted in desired colour
·
Delivered with hot dip galvanised steel base frame foundation or
·
concrete foundation
·
17000 transformer stations produced since 1967
TECHNICAL DATA
Medium voltage switchgear
Rated voltage
Rated current
Rated busbar current
Rated short-time withstand current
Rated peak withstand current
Low voltage distribution
Rated voltage
Rated current max
Transformer
Rated power max
Ambient temperature
Degree of protection
Options
kV
A
A
kA (1s)
kA
12 / 17,5 / 24
400, 630, 1000
400, 630, 1250
16 / 20 / 25
40 / 50 / 63
V
A
690
4000
kVA
2500
C
-40...+55
IP44
Concrete foundation
Forced ventilation
Remote control
0
HIGH VOLTAGE COMPARTMENT
Standard medium voltage distribution cubicles are equipped with air
or SF6 insulation load break switches, surge arresters and capacitive
voltage indication. Optionally it is possible to order - current, voltage
transformers for kWh metering, short circuit indication and motor
operation, which allows a full remote control and ARS (automatic
reserve switching). As an option high voltage compartment can be
equipped with any brand of SF6 insulated RMU.
LOW VOLTAGE COMPARTMENT
The low voltage unit is either an open distribution board with a busbar
running the length of the assembly or a metal-enclosed, modular
switchgear type Sl-04. Switch-fuses type SLC and SLB (ABB
Kabeldon, Sweden) or NH (EFEN, Germany) as well as MCCB'S
with rated currents up to 4000 A can be used as switching devices.
Metering instruments can be installed if required.
TRANSFORMER COMPARTMENT
In every case (except low power - less then 100kVA transformers) are
to be transported separately and placed in to the substation through
the door or roof (optionally) at site. Rated power of the transformers
placed in the substation is up to 2500 kVA.
HOUSING AND DIMENSIONS
The standard height of the substation MTT is 2510 mm. The housing
is assembled of modules the width of 250, 500 or 750 mm. Modules
are made of corrosion-proof 2.0 mm hot dip galvanised sheet steel.
The foundation of the substation is made of hot-dip galvanised sheet
steel of 4 mm. The housing of substation is powder painted in
standard colour RAL7032. Other colours - on special request.
PREFABRICATED SUBSTATION BUILDING
MAIN CHARACTERISTICS
The KAMP Substation building consists of modules that are
preassembled at the factory to give shorter delivery, time and
faster installation and commissioning on site, thereby saving
both time and costs. Modularization also offers optimized space
utilization and a wide variety of layouts that allows substation to
be easily extended or relocated in the future.
The KAMP Prefabricated Substation Building is a compact
solution that meets all the most stringent requirements for
modern switching substations.
The KAMP design is optimized for ELGA switchgears; all
individual components therefore match perfectly with each
other.
In possible arcing situations hot gases and over pressure are
directed outside the building via arc relief channels.
By using standard KAMP modules it is possible to create a wide
variety of layouts, to meet all customer requirements for
practical substation building. Modules are also available to offer
flexibility in meeting special requirements.
Raised access floor system placed in the building is very useful
where frequent modifications of electrical, telecom or
RTU/SCADA wiring is needed. Raised floor system has
approriate heat and fire resistance.
As standard the walls are 60 mm (roof 80 mm) thick, insulated
with polyurethane (rock wool on request) and covered on both
sides with galvanized and painted profiled steel sheets.
External steel frame parts are hot dip galvanized ( >80µm),
which makes KAMP resistant to corrosion.
ADVANTAGES:
·
Completely Commissioned
·
Fast Production and Commissioning
·
Less Civil Work
·
Easy Extensibility
·
Easy Relocation
STANDARD SAFETY FEATURES
·
Arc relief channels
·
Automatic DC emergency lighting
·
Door alarm contacts
·
Motion sensors for automatic switching of outdoor lights
·
Separate doors for switchgear and control room
·
All earthing connections inside building are connected to a common
main earthing bar
·
Safety signs for maintenance
·
Ventilation system
ACCESSORIES
·
Electric heaters
·
Lighting board
·
Rack for MV Switchgear maintenance tools
·
Fuse holders for MV fuses (if fuses included in delivery)
·
Cabinet for fuses
OPTIONS
·
Toilet
·
Separate battery room
·
Infrared heaters (temporary heating)
·
Special color on building
·
Air conditioning
·
Fire alarm system
MEDIUM VOLTAGE OUTDOOR DISCONNECTORS
MAIN CHARACTERISTICS
Outdoor disconnectors type LSP, produced in accordance with the
ELGA AB documentation, used for several years on medium voltage
long-distance lines, have proven their high reliability and safety of
operation. The disconnectors are designed for commutating one or
three - phase power lines and other electrical equipment in an open air
transmition networks. In order to improve the operating reliability of
medium voltage networks it is important to be able to isolate possible
faults quickly. High performance, remotely controllable pole mounted
disconnectors are an absolute necessity for isolating faults, and also
when changing the normal use of the networks.
Simple disconnectors of a sturdy structure proved themselves in an
excellent way under very different climatic conditions.
The foundation welded frame is made of steel profiles which guarantee
perfect surface protection from corrosion caused by heat zinc coating
that can be controlled on all places. The shafts of the load disconnectors
mounted in bronze bearings as well as all other steel components are
protected by heat zinc coating, too.
TECHNICAL DATA
LSP-10
Rated operating voltage
Test voltage (50-60) Hz, 1 min
U, kV
U(1 min), kV
Rated continuous current
U, kV
In, A
Breaking capacity (number of operations)
Rated short time withstand current
LSP-20
12
24
42 (48)
50 (60)
75 (85)
125 (145)
200-400-630
200-400-630
In, A
25 (20 CO)
15 (20 CO)
Icw(3s), kA
12,5; 16; 20
8; 12,5; 16
Peak current
Icm, kA
31,5; 40; 50
20; 31,5; 40
Mechanical endurance
CO cycles
2000
2000
Impulse withstand voltage (1,2-50) µs
DELIVERY
Disconnectors will normally be delivered as fully assembled elements,
which include pole elements, support structures, control tubes and
manual operating devices. If required, the disconnectors can also be
delivered without support framework, enabling the customer to mount
the pole elements on his own support structure. For remote control
applications the disconnectors can be fitted with a motor operating
device.
TYPE TESTING
LSP disconnectors satisfy standards IEC 60265, IEC 61128, IEC 61129,
GOST 689-90. They have been succesfully tested in accreditatied high
voltage test laboratory IEL in Warszaw.
INSULATORS
The polymer insulators mounted on LSP disconnectors are
light, but very sturdy to withstand electrodynamic shocks.
Silicone, used as a protective shell for the insulator, has
proved to be a highly reliable polymer material under
operating conditions, and ensures electric strength of the
insulator's surface and protection of the glass-reinforced
plastic rod from environmental factors.
The excellent hidrofobicity of insulators silicone allows the
use of LSP disconnectors even in highly polluted areas.
High resistance of insulators to ultra-violet rays, moisture,
heat, frost determines the usage of LSP disconnectors in
all climatic regions.
Due to the diffusion of molecules with a low molecular
weight onto the soiling layer, even soiled insulators remain
water-repellent. Operation experience shows that waterrepellence of the silicone insulators' surface remains at a
high level during its entire service life. In most cases, it will
not be necessary to wash insulators at all or the amount of
washings will be significantly reduced, which, in turn,
decreases operating costs. The high reliability of the
interfaces between materials of the insulator allows the
washing of insulators, if necessary, by high pressure water
jet without danger of depressurization.
As an alternative 24kV LSP-20 disconnectors can be
supplied with HA-24 type cycloaliphatic epoxy resin
insulators.
Recommended application for insulators
use Acc. to IEC 815
1. Common shaft
2. Base
3. Fixed insulator
4. Movable insulator
5. Mechanical joint
6. Operation rods
7. Position of padlocks
8. Terminal
9. Baseplate of handle
10. Lever of the handles
11. Terminal - main
permanent contacts
12. Auxiliary contacts
13. Terminal
14. Main movable contacts
15. Flexible conductor
16. Earthing terminal
17. Joint
CONTACTS
All parts of the current path are made of copper. Contact pressure
is maintained with use of stainless steel compression springs. The
contact life is increased by the facility to be able to turn the contact.
ELGA UAB
Pramonės St. 12,
LT-78150 Šiauliai, Lithuania
Tel.: +370 41 594 710
Fax: +370 41 594 725
E-mail: info@elga.lt
Internet: www.elga.lt
ELGA-CATALOGUE - Rev. 0.3 - EN - 2013.01