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  • 7/30/2019 Manual(Power Fuse)

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    LG Current Limiting Power Fuse

    LFL Power Fuse Series (P,G,J,M Type)

    INSTRUCTION MANUAL

    http://www.lgis.com

    Before making any operation, make sure to use this product after reading the

    article of Safety Precautions in this complete set of instruction.

    Reserve this manual at visible place where any personnel to operate it can

    see it easily.

    CONTENTS

    Power Fuse

    Safety Precautions ------------------------------------ -------------------

    Receiving & Unpacking, Service Conditions -----------------------

    Moving, Storage and Disposal -----------------------------------------

    P Type Current Limiting Power Fuses ------------------------------

    1.Ratings -------------------------------------------------------------------

    2.Installation ---------------------------------------------------------------

    3.Change of fuse links ----------------------------------------------------4.Maintenance and Inspection -----------------------------------------

    G Type,J Type Current Limiting Power Fuses -------------------

    1.Operating indication of fuse links ----------------------------------

    2.Fitting and change of fuse links -------------------------------------

    3.Installation --------------------------------------------------------------

    4.Operations ---------------------------------------------------------------

    5.Maintenance and Inspection -----------------------------------------

    M Type Current Limiting Power Fuses ----------------------------

    1.Operating indication of fuse links ----------------------------------

    2.Fitting and change of fuse links -------------------------------------3.Installation --------------------------------------------------------------

    4.Operations ---------------------------------------------------------------

    5.Maintenance and Inspection -----------------------------------------

    6.Life expectancy and Replacement ----------------------------------

    Quality Guarantee ------------------------------------------------------

    1.Quality Guarantee Certificate ---------------------------------------

    1

    3

    4

    5

    5

    5

    55

    6

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    6

    6

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    9

    9

    99

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    11

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    13

    13LG Industrial Systems

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    1

    DANGERUsed where there is a hazard of severe bodily injury or

    death. Failure to follow a DANGER instruction will

    result in severebodily injury or death.

    WARNING

    The safety precautions are consist of the following special message may appear

    throughout this manual to warn of potential hazards and to call attention to

    additional information which clarifies or simplifies a procedure.

    CAUTION

    Please follow this Safety Precautions surely so that any failure to observe theseprecautions could result in severe personal injury, death or equipment damage.

    This signal means to call a persons attention for any operation orsubjects which makes a hazard of bodily injury or equipment damage.

    Read it carefully and follow the instruction at this signal.

    The meaning of following signal on the products and in this inst ruction describes as below ;

    This signal means to call a persons attention for electric shock under the

    special environment condition.

    Do not make any touch to charged parts electrically like conductors, terminals

    and disconnects etc., under any of energized condition.

    Can cause electric shock, severe bodily injury or electrocution.

    DANGER

    Safety Precautions

    Used where there is a hazard of severe bodily injury or

    death. Failure to follow a WARNING instruction may

    result in bodily injury or death.

    Used where there is a hazard of equipment damage. Failure

    to follow a CAUTION instruction may result in damageof equipment.

    2

    1. Only a qualified electrical workers with training and experience high voltage

    circuits should perform any operation, maintenance and inspectio .

    may result in malfunction, severe bodily injury or electric shock.

    2. Before performing any inspection or maintenance on this device, disconnect all

    sources of electric power and take every precautions to see that all connections

    are de-energized and grounded.

    may result in severe bodily injury or electric shock.

    3. When making bolts and screw assembling, follow the instruction with

    recommended torque values

    may result in over heating or burns.

    4. After performing installation, maintenance, inspection, remove some foreign

    objects like tools, test leads or bolts, instruments.

    may cause short circuit or burn.

    5. When making any inspection, perform this procedure after disconnecting

    main circuit perfectly by visual or insulated ground stick.may cause electric shock.

    6. When the trip mechanism has operated, always replace all three fuses in a

    three phase or two phase circuit even though only one or two are open circuited

    may result in explosion by the possibility of internal elements damage.

    WARNING

    1. The fuse must be stored in clean, dry, dust and condensation-

    free environment.

    may cause a weakness of insulation.

    2. The products must be stored at the place with no corrosive gas.

    may cause a damage of product s (discoloration)

    3. Do not impact on the products when moving.

    may cause a damage of products.

    CAUTION

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    3

    Receiving & Unpacking, Service Conditions

    Receiving & Unpacking

    1. Fuse links and fuse holders are packed in corrugated cardboard boxes separately toprevent from any damage during shipment.When using them, do insert fuse links into fuse holders.

    2. Before performing any installation make sure to check the ratings again indicated onname plate and cap of fuse links.

    3. If damage or breakage of products are founded, immediately notify LGIS sales office orservice representatives.

    4. If damage or breakage of products by the carrier are founded, immediately file a claim withthe carrier and notify the shipping company.

    Operating conditions

    1 Normal operating conditionDesign to IEC 60282-1, with the following limits values :

    Ambient temperature

    Maximum : +40 Maximum 24 hour average : +35

    Minimum : -25

    Maximum site altitude : 1000 m above sea level.

    Humidity

    24 hour average value : 95%

    One month average value : 90%

    2 Special operating conditions

    Special operating conditions are to be agreed on by the manufacturer and user.

    The manufacturer must be consulted in advance about each special operating conditions

    using at the following cases or places :

    Higher level of site altitude or ambient temperature exceeding the normal conditions Outdoor using

    At a wet place with high humidity usually

    At places with much water or oil vapors

    At places with an explosive, flammable or noxious gas

    At places with much dust

    At places with abnormal vibration or impact

    In case of using a special fuse holder made by users.

    In case of using at other special conditions besides above cases

    Moving, Storage and Disposal

    1. Do make a moving of fuse links with packed condition.

    2. Do not impact on products or not drop products when assembling fuse holders.

    Moving

    1. Do not impact on the products when moving.

    may cause a damage of products

    CAUTION

    1. The fuse must be stored in clean, dry, dust and condensation- freeenvironment.

    may cause a weakness of insulation.

    2. The products must be stored at the place with no corrosive gas.

    may cause a damage of product s (discoloration)

    CAUTION

    Storage

    1. When making a disposal, dispose it at a designated place with

    no affection to environment.may cause an environmental pollution

    CAUTION

    Disposal

    1.According to the ISO 14000, separate all of them as metallic or non-metallic material

    and dispose them at a designated place after dividing e all of material as renewable

    materials and other materials which may cause an environmental pollution.

    2. In case of being materials whatever you want to remake please contact us.

    3. In case of special materials making noxious gas when destroying by fire, be sure to

    dispose them at an approved place

    4

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    P Type Current limiting power fuses

    The ratings of fuse links are as follow :

    1. Ratings

    Use Type Place Rated voltage,kV Rated currnet,A Rated breaking capacity(3P),MVA Length of fuse link,mm

    P T LFL-6P-1 Indoor 3.6/7.2 1P 250/500 110

    2. Installation

    Make an installation of fuse links as same insulation distance with ones of adisconnecting switch because these fuse links having a complete insulated structure

    do not emit any gas.

    Always only fuse links can be replaced simply.

    3. Replacement of fuse links

    Replace fuse links only as new ones if after the fuse trip mechanism has operated

    1. When the trip mechanism has operated at short circuit fault,

    always replace all three fuses in a three phase or two phase

    circuit even though only one or two are open circuited

    may result in explosion by the possibility of internal elements damage.

    WARNING

    4. Maintenance & inspection

    Perform the periodic inspection one time per a year for contact s, uncleanness on the

    surface of porcelain, looseness of screws (specially for clips).

    6

    G & J Type Current limiting power fuses

    1. Operating indication of fuse links

    LFL-G,J-Type : When a power fuse blows, a striker pin extends from the loadend of the fuse about 10mm length.(An initial operating load is

    over 0.5kg)

    LFL-20J-1 : No striker fin has fitted.

    LFL-G-B/C Type (DIN Type) : When a power fuse blows, a striker pin extendsfrom the load end of the fuse about 10mmlength.(An initial operating load is over 0.5kg)

    2. Fitting and replacement of fuse links

    For the part of hinge, loosen a bolt () as shown in figure 1 and insert the striker pinof fuse link. Then retighten this bolt ().

    For the part of clip tighten a hook ring() as shown in upper figure 2 on a fuselinks cap correctly.

    In case of fuse checker of LFL-G-B/C Type (DIN Type), tighten a adhesive pointof fuse checker as shown in upper figure 3 with two screws and then adhere it to let

    a striker pin of fuse link be to the direction of fuse checker.

    When a power fuse blows, replace fuse links only with new ones.

    3. Installation

    Make an installation of fuse links as same insulation distance with ones of adisconnecting switch because these fuse links having a complete insulated structure

    do not emit any gas.

    Figure 1. Hinge of fuse link

    (Operating indication of fuse link)Figure 2. Opening of fuse link

    tube

    Fuse link

    striker pin

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    G & J Type Current limiting power fuses

    7

    4. Close-open operation

    Make a close-open operation by inserting a hook-bar into a hook hole ()as shown in Figure 2, 4. The opening angle is 45.

    LFL-G-B/C Type (DIN Type) : Make a close-open operating a spring ofin Figure 4 by using a hook bar.

    1. When making a close -open operation, be careful not to impact on

    products with light operation.

    may cause a broken of fuse links because of making of porcelain material.

    CAUTION

    Figure 3. Fuse checker of DIN type

    Adhesive point of screw

    (2 points) in DIN type of

    Fuse link

    Figure 4. DIN type of fuse

    G & J Type Current limiting power fuses

    8

    5. Item of maintenance and inspection

    1. When using for protection of transformers or condensers,replace all phase of fuse links after over 1000 close-open operation.

    There may be a possibility of weakness by heating at elements inside fuse links.

    2. Be careful for using fuse links so that the life expectancy may be

    reduces according to the operating conditions

    CAUTION

    WARNING

    1. When the trip mechanism has operated at short circuit fault,

    always replace all three fuses in a three phase or two phase

    circuit even though only one or two are open circuited

    may result in explosion by the possibility of internal elements damage.

    Method sandard Period Remarks

    Visual No crack on fuse links One/year

    No dusty points on fuse links cleaning

    A striker pin shound not be extended

    Spanner Joint and screws should not be loosen

    Visual No broken or no crack on the surface

    No dusty points on surface cleaning

    Micro carbon

    Grease

    Joints Spanner Joint of bolts and nuts should not be loosn

    Others Visual Bolts and nuts should not be loosen

    1000V Mega

    Over 1000 between an eath and a conductive

    arts

    Insulated

    resistance

    Fuse

    holder

    s No overheating, no discoloration and no variation

    Item

    Fuselinks

    Porcelain

    Frictional

    parts

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    M Type Current limiting power fuses

    9

    When a power fuse blows, a striker pin extends from the load endof the fuse about10mm length.(An initial operating load is over 0.5kg)

    2. Fitting and replacement of fuse links

    For the part of hinge, loosen a bolt ( ) as shown in figure 5 and insert the striker pinof fuse link. Then retighten this bolt ().

    For the part of clip tighten a hook ring() as shown in upper figure6 on a fuselinks cap correctly in case of under 3.6kV 100A and 7.2kV 50A.

    In case of over the above current ratings, tighten hook ring( ) as shown in Figure 7by attaching it on tube inside a cup of fuse link with no gap.

    When a power fuse blows, replace fuse links only with new ones.

    3. Installation

    Make an installation of fuse links as same insulation distance with ones of adisconnecting switch because these fuse links having a complete insulated structure

    do not emit any gas

    4. Close-open operation

    Make a close-open operation by inserting a hook-bar into a hook hole ()as shown in Figure 2, 7.

    The opening angle is 55for 3.6kV and 45for 7.2kV.

    1. Operating indication of fuse links

    Power Fuse

    M Type Current limiting power fuses

    10

    1. When making a close -open operation, be careful not to impact on

    products with light operation.

    may cause a broken of fuse links because of making of porcelain material.

    CAUTION

    Figure 5. Hinge part of fuse link

    (Operating indication

    status of fuse link)

    Figure 6. Fuse link Figure 7. Close position of fuse

    link

    Under 7.2kVM50 A

    Under 3.6kV

    M100 A

    Striker pin of

    fuse link

    7.2kV

    M200 A

    Tube

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    Method sandard Period Remarks

    Visual No crack on fuse links One/year

    No dusty points on fuse links cleaning

    A striker pin shound not be extended

    Spanner Joint and screws should not be loosen

    Visual No broken or no crack on the surface

    No dusty points on surface cleaning

    Micro carbon

    Grease

    Joints Spanner Joint of bolts and nuts should not be loosn

    Others Visual Bolts and nuts should not be loosen

    1000V Mega

    Over 1000 between an eath and a conductive

    arts

    Item

    Fuselinks

    Porcelain

    Frictional

    parts

    Insulated

    resistance

    Fuse

    holder

    s No overheating, no discoloration and no variation

    M Type Current limiting power fuses

    11

    Make a cleaning a time per a half year at least in place with much dust.

    1. When using for protection of transformers or capacitors, replace

    all phase of fuse links with new fuse links after 30,000 operations.

    There may be a possibility of weakness by heating at elements inside fuse links

    2. Be careful that fuse links may have a possibility of short- life

    expectancy according to the operating conditions.

    CAUTION

    6. Life expectancy and Replacement

    The fuse links have an life expectancy of 30,000 operations at anormal operat ingconditions of electric motor circuit (Rated current x 5, 10 sec)

    When a fuse link has reached a specified life or when is damaged, it isrecommended that it be replaced.

    5. Item of maintenance and inspection

    M Type Current limiting power fuses

    12

    WARNING

    1. When the trip mechanism has operated at short circuit fault,

    always replace all three fuses in a three phase or two phase

    circuit even though only one or two are open circuited

    may result in explosion by the possibility of internal elements damage.

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    http://www.lgis.com

    HEAD OFFICE

    LG constantly endeavors to improve our products,so that information in

    this manual is subject to change without notice

    LG Twin Tower W19F,20,Yoido-Dong Young dung po-gu

    Seoul 150-721,Korea

    Tel : (82)2-3777-4900~4910

    Fax : (82)2-3777-4849

    13

    LG

    LG Industrial Systems

    PLANT

    #1,Song Jung Dong,Hung Duk Gu ,Cheong Ju City,

    361-720.Korea

    Tel : (82)43-261-6333~4

    Fax : (82)43-261-6615