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ABOUT COMPANYEventsContact us
OHL 6-10KV SOLUTIONSOHL 20-220KV SOLUTIONS
Рус | Eng
LOOP-TYPE LONG FLASH-OVER ARRESTERApplication
This arrester having LFA-L official short title in accordance with 2002 Technical conditions
passed all necessary tests, certified and accepted for serial production and application in power
systems by interdepartmental commission.
LFA-L arrester is designed to protect 6, 10 kV three-phase AC power transmission overhead lines
with open and shielded wires from induced lightning overvoltage and its secondaries and
intended for operation in open air at -60°C to +50°C temperature. Its lifetime is 30 years.
Now LFA-L 1 arresters are widely used in different regions of Russia in construction of new OHL
and in reconstruction and retrofitting of existing 6, 10kV overhead lines according to project
solutions based on necessary technical documentation developed by R&D Center for Power
Engineering.
Number of arresters successfully operating in many regions of Russia exceeds 300 000.
External appearance
Principle of operationSpecificationsInstallation
PresentationsStreamer main presentation
Multi-chamber system
VideoMulti-chamber system 1Multi-chamber system 2Multi-chamber system 3Multi-chamber system 4
Copyright © 2010 Streamer Inc.
All rights reserved.
Address: Office 17N, 147 Nevsky prospect, Saint-Petersburg 1910 Russia
Phone: +7 (812) 327 0808 Fax: +7 (812) 327 3444 E-mail: [email protected]
ABOUT COMPANYOHL 6-10KV SOLUTIONS
OHL 20-220KV SOLUTIONSРус | Eng
MODULAR LONG FLASH-OVER ARRESTERApplication
Modular Long Flash-over arrester (LFA-M) is designed to protect 6, 10 kV three-phase AC open
and shielded wires OHL and substation approach zones from direct lightning strikes and
induced lightning overvoltages. Since LFA-M has best volt-time characteristics it is reasonably to
use it for protection of line sections amenable to direct lightning strikes and OHL substation
approach zones.
LFA-M consists of two LDPE resistor cord cable sections connected by collars. The arrester is
equipped with end terminals designed to connect the arrester to wire and bracket to connect the
latter to OHL tower. Fitting elements are additionally connected with tower end by grounding bar.
Wire clamp design has two modifications permitting to mount the arrester as on open as on
shielded wires for existing bite-through barbs. Long-flashover arrester lightning protection
technique is suitable for use with any type of towers – concrete, metal, wood, with any type of
insulators – rod-type, terminal, suspension, porcelain, glass, polymer and wires – open and
shielded..
External appearance
Principle of operation
LFA-M consists of two resistor cord cable sections. These sections are connected in such a way
that produce three discharge modules 1, 2, 3.
Resistor cord sections are connected to end terminals through inner spark gaps И1, И2, И3, И4.
Under lightning overvoltage impulse these gaps are flashed over and upper cable section resistor
cord with R resistance carry high potential U to the center of the lower cable section surface.
Similarly, the lower cable section resistor cord with resistance R carry high potential 0 to the
center of the upper cable section surface. Thus full voltage U is applied simultaneously to each
discharge module and conditions for simultaneous development of surface discharges that under
flashover of respective modules producing a single long flashover channel for all discharge
modules 1,2,3 are provided.
Specifications
Voltage rate 10 kV
Surface flashover length 1500 mm
Pulse 50% discharge voltage, at most
Positive polarity
Negative polarity
100 kV
90 kV
ШФ10-Г insulator matching voltage 300 кВ
Inner insulation withstand pulse voltage, at least
50 impulses
300 kV
Fundamental frequency withstand voltage, at least
In dry condition
In the rain
42 kV
28 kV
Multiply withstand pulse current 8/20 µs, at least
20 impulses
40 kA
Weight 1,6 kg
Lifetime, at least 30 years
Installation
In case it is necessary to provide guaranteed protection against any lightning impacts including
direct lightning strike each tower of the OHL protected section should be equipped with three
LFA-M modular-type arrester, one per phase. In this case it is necessary to provide low (10 Ohm
at most) grounding resistance only for three nearest towers of substation approach zone.
According to lightning protection requirements the rest of towers need no grounding. If according
to feasibility study it is reasonable to protect only separate OHL sections from direct lightning
strike, the protection should be of the following arrangement. Each tower phase of this section
should be equipped with three modular-type LFA-M arresters. Two extreme towers of the
protected OHL section should be grounded and grounding resistance should not exceed 10 Ohm.
If for objective reasons this requirement fails it should be compensated by additional grounding of
one more or some other adjacent extreme towers of this section. Other towers of this section
need no special grounding.
Protection of substation approach zone
To protect substation approach zone from lightning overvoltage incoming waves it is necessary
to install a set of three LFA-M onto each of the four towers nearest to the substation. This tower
should be grounded according to existent requirements.
Mounting of LFA-M arrester sets permits to eliminate close-substation shot-circuits caused by
lightning overvoltages and leading to fatal electro-dynamic strokes for transformer windings
efficiently increasing reliability and lifetime of towers.
PresentationsStreamer main presentation
Multi-chamber system
VideoMulti-chamber system 1Multi-chamber system 2Multi-chamber system 3Multi-chamber system 4
Copyright © 2010 Streamer Inc.
All rights reserved.
Address: Office 17N, 147 Nevsky prospect, Saint-Petersburg 1910 Russia
Phone: +7 (812) 327 0808 Fax: +7 (812) 327 3444 E-mail: [email protected]
ABOUT COMPANYOHL 6-10KV SOLUTIONS
OHL 20-220KV SOLUTIONS
Рус | Eng
COMPACT MODULAR LONG FLASH-OVER ARRESTERApplication
LFA-M-c arresters are intended to protect 6, 10kV three-phase AC compact wire (open and
shielded) arrangement OHL with minimal interwire distance of 50cm and 20 class insulators in
areas with the second degree of atmospheric pollution.
External appearance
Principle of operationSpecificationsInstallation
PresentationsStreamer main presentation
Multi-chamber system
VideoMulti-chamber system 1Multi-chamber system 2Multi-chamber system 3Multi-chamber system 4
Copyright © 2010 Streamer Inc.
All rights reserved.
Address: Office 17N, 147 Nevsky prospect, Saint-Petersburg 1910 Russia
Phone: +7 (812) 327 0808 Fax: +7 (812) 327 3444 E-mail: [email protected]
ABOUT COMPANYOHL 6-10KV SOLUTIONS
OHL 20-220KV SOLUTIONSРус | Eng
DOUBLE LONG FLASH-OVER ARRESTERApplication
The arrester is designed to protect 6, 10 kV three-phase AC open and shielded wires OHL from
induced lightning overvoltages and its secondaries when it is necessary to use double fitting of
wires.
Principle of operationSpecificationsInstallationExternal appearance
PresentationsStreamer main presentation
Multi-chamber system
VideoMulti-chamber system 1Multi-chamber system 2Multi-chamber system 3Multi-chamber system 4
Copyright © 2010 Streamer Inc.
All rights reserved.
Address: Office 17N, 147 Nevsky prospect, Saint-Petersburg 1910 Russia
Phone: +7 (812) 327 0808 Fax: +7 (812) 327 3444 E-mail: [email protected]
ABOUT COMPANYOHL 6-10KV SOLUTIONS
OHL 20-220KV SOLUTIONSРус | Eng
OHL 20-220KV SOLUTIONS
Over recent years, Streamer Research and Production Company has been active in development
of so called arresters with multi-chamber system (MCS), succeeding in production of new 10 to
220 kV arresters , as well as a novel device termed ‘multi-chamber system insulator arrester ’
(MCIA) which combines properties and functions of arrester and insulator. Application of MCIAs
makes it possible to ensure lightning protection of overhead lines of any voltage ratings: the
higher the line voltage, the larger the number of units in a string and thus the higher the rated
voltage and the arc-quenching capacity of a string of insulator arresters.
Various designs of insulators with arrester properties are possible. An MCIA is generally a
production glass, porcelain, or composite insulator fitted with an MCS. Installation of an MCS
confers arrester properties to the insulator without any deterioration of its insulating capacity. For
this reason, application of MCIA on overhead lines makes shield wire redundant, while the height,
weight, and cost of poles or towers goes down. At a lower overall cost and with a better lightning
performance, such a line features a noticeably reduced number of lightning failures, cuts damage
from undersupply of energy, and lowers maintenance costs. MCIAs hold much promise in
protection of railway overhead contact systems against direct lightning strokes (DLS).
The base of multi-chamber arresters (MCA), including MCIA, is the MCS comprises a large
number of electrodes mounted on a silicon rubber length. Holes drilled between the electrodes
and going through the length act as miniature gas discharge chambers. When a lightning
overvoltage impulse is applied to the arrester it breaks down gaps between electrodes.
Discharges between electrodes take place inside chambers of a very small volume; the resulting
high pressure drives spark discharge channels between electrodes to the surface of the insulating
body and hence outside, into the air around the arrester. A blow-out action and an elongation of
inter-electrode channels lead to an increase of total resistance of all channels, i. e. that of the
arrester, which limits the lightning overvoltage impulse current.
As the the mechanism of spark discharge quenching in MCSs is similar to that of arc discharge
quenching in a tube expulsion arrester. A substantial difference is that an arc keeps burning
inside a tube arrester fairly long, up to 10 ms (i. e. 10,000 μs). It burns out the walls of the gas-
generating tube so that thermal breakdown gases blow the discharge channel out. With zero
quenching occurring in a MCS, the arc starts in workstation-quenching chambers and ends when
most of it gets blown out. The chamber material does not generate gases; the blowout happens
owing to expansion of the discharge channel alone, so erosion of the chamber walls is negligible.
Impulse quenching, which lasts a few microseconds or dozens of microseconds, involves next to
no erosion even after numerous firings of MCS.
PresentationsStreamer main presentation
Multi-chamber system
VideoMulti-chamber system 1Multi-chamber system 2Multi-chamber system 3Multi-chamber system 4
Copyright © 2010 Streamer Inc.
All rights reserved.
Address: Office 17N, 147 Nevsky prospect, Saint-Petersburg 1910 Russia
Phone: +7 (812) 327 0808 Fax: +7 (812) 327 3444 E-mail: [email protected]
ABOUT COMPANYOHL 6-10KV SOLUTIONS
OHL 20-220KV SOLUTIONSРус | Eng
MULTI-CHAMBER INSULATOR-ARRESTER FOR OHL 35-220KVApplication
Multi-chamber insulator-arrester (MCIA) is a fundamentally new device simultaneously
combining properties of insulator and arrester. Its application permits to protect 35-500 kV
overhead transmission lines from direct lightning strike and induced lightning impact and its
secondaries.
MCIA application instead of standard insulators permits to provide protection of overhead lines of
any voltage rating so as the higher voltage rating the higher number of insulators in a string and
thus the higher rated voltage the higher arc quenching capability of a MCIA string.
MCIA application on OHL makes overhead protection cable unnecessary resulting in reduction of
tower height, weight and tower cost and OHL cost on the whole and providing reliable lightning
protection.
Installation
MCIA application instead of standard insulators permits to provide protection of overhead lines of
any voltage rating so as the higher voltage rating the higher number of insulators in a string and
thus the higher rated voltage the higher arc quenching capability of a MCIA string.
MCIA application on OHL makes overhead protection cable unnecessary resulting in reduction of
tower height, weight and tower cost and OHL cost on the whole and providing reliable lightning
protection.
External appearance
PresentationsStreamer main presentation
Multi-chamber system
VideoMulti-chamber system 1Multi-chamber system 2Multi-chamber system 3Multi-chamber system 4
Copyright © 2010 Streamer Inc.
All rights reserved.
Address: Office 17N, 147 Nevsky prospect, Saint-Petersburg 1910 Russia
Phone: +7 (812) 327 0808 Fax: +7 (812) 327 3444 E-mail: [email protected]