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ABOUT COMPANY Events Contact us OHL 6-10KV SOLUTIONS OHL 20-220KV SOLUTIONS Рус | Eng LOOP-TYPE LONG FLASH-OVER ARRESTER Application 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

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Page 1: About Company

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

Page 2: About Company

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]

Page 3: About Company

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

Page 4: About Company

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

Page 5: About Company

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

Page 6: About Company

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

Page 7: About Company

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

Page 8: About Company

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

Page 9: About Company

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

Page 10: About Company

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

Page 11: About Company

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.

Page 12: About Company

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.

Page 13: About Company

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.

Page 14: About Company

Address: Office 17N, 147 Nevsky prospect, Saint-Petersburg 1910 Russia

Phone: +7 (812) 327 0808   Fax: +7 (812) 327 3444   E-mail: [email protected]