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    12 KV - 36 KV 4 525 KV 2.25 123 - 145 KV 3 765 KV 2.0 245 KV 3 1500 KV 1.5 (Projected) 420 KV 2.5

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    Susil Kumar Khuntia
    LIGHTNING ARRESTER MAXIMUM SWICHING SURGE LEVEL IN pu (pu = [?]2 V line (max) / [?]3) Highest system voltage KV, RMS Typical Switching Surge pu TECHNICAL PARTICULARS OF STATION CLASS ARRESTERS FROM 11 to 33 KV (AS PER IEEMA 20-2000) Sl. No Particulars MCOV (RMS) Discharge Current Line Discha. Class Rated frequency

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    12 KV - 36 KV 4 525 KV 2.25 123 - 145 KV 3 765 KV 2.0 245 KV 3 1500 KV 1.5 (Projected) 420 KV 2.5

    Uploaded by

    Susil Kumar Khuntia
    383 views4 pages
    LIGHTNING ARRESTER MAXIMUM SWICHING SURGE LEVEL IN pu (pu = [?]2 V line (max) / [?]3) Highest system voltage KV, RMS Typical Switching Surge pu TECHNICAL PARTICULARS OF STATION CLASS ARRESTERS FROM 11 to 33 KV (AS PER IEEMA 20-2000) Sl. No Particulars MCOV (RMS) Discharge Current Line Discha. Class Rated frequency

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    LIGHTNING ARRESTER MAXIMUM SWICHING SURGE LEVEL IN pu (pu = [?]2 V line (max) / [?]3) Highest system voltage KV, RMS Typical Switching Surge pu TECHNICAL PARTICULARS OF STATION CLASS ARRESTERS FROM 11 to 33 KV (AS PER IEEMA 20-2000) Sl. No Particulars MCOV (RMS) Discharge Current Line Discha. Class Rated frequency

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    Download as DOC, PDF, TXT or read online from Scribd
    Download as doc, pdf, or txt
    383 views4 pages

    12 KV - 36 KV 4 525 KV 2.25 123 - 145 KV 3 765 KV 2.0 245 KV 3 1500 KV 1.5 (Projected) 420 KV 2.5

    Uploaded by

    Susil Kumar Khuntia
    LIGHTNING ARRESTER MAXIMUM SWICHING SURGE LEVEL IN pu (pu = [?]2 V line (max) / [?]3) Highest system voltage KV, RMS Typical Switching Surge pu TECHNICAL PARTICULARS OF STATION CLASS ARRESTERS FROM 11 to 33 KV (AS PER IEEMA 20-2000) Sl. No Particulars MCOV (RMS) Discharge Current Line Discha. Class Rated frequency

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    LIGHTNING ARRESTER

    MAXIMUM SWICHING SURGE LEVEL IN pu (pu = √2 V line (max) / √ 3)

    Highest System Typical Switching Highest System Typical Switching


    Voltage Surge pu Voltage Surge pu
    KV, RMS KV, RMS

    12 KV – 36 KV <4 525 KV 2.25


    123 – 145 KV <3 765 KV 2.0
    245 KV 3 1500 KV 1.5 (Projected)
    420 KV 2.5

    TECHNICAL PARTICULARS OF STATION CLASS ARRESTERS FROM 11


    TO 33 KV
    (AS PER IEEMA 20-2000)

    Sl. Particulars System Voltages in KV


    No
    11 11 11 11 22 22 33 33
    1 Rating KV (RMS) 9 9 9 9 18 18 30 30

    2 MCOV (RMS) 7.2 7.2 9.6 9.6 15 15 25 25


    3 Discharge Current 10 KA
    4 Line Discha. Class 1 2 1 2 1 2 1 2
    5 Rated frequency 50HZ

    a) IR at MCOV Less than 400 micro Amps.

    b) IG at MCOV About 1200 micro Amps.


    6 a) Reference Current, mA 1 to 5 mA

    b) Reference Volt at Greater than Rated Voltage


    Reference Current
    7 Max. RDA
    (KV p) at

    a) 5KA 27 26 36 33 51 52 90 86

    b) 10KA 30 28 38 36 60 56 95 90

    c) 20 KA 34 30 42 40 68 60 105 100
    8 Max. Switch IMP R V
    (KVp

    500A 24 22.4 30.4 28.8 48 44.8 76 72


    1000A - - - - - - - -
    9 Max. Steep Current 36 34 42 40 60 56 105 100
    Impulse RDV (KVp)
    10 High Current Impulse
    Withstand 100KAp
    11 TOV (KVp)
    i) 0.1 Sec 15 16 21 21 32 32 53 53
    ii)1.0 Sec 15 15 20 20 30 30 51 51
    iii) 10.0 Sec 14 14 19 19 29 29 49 49
    iv) 100.0 Sec 13 13 18 18 28 28 47 47
    12 Insulation Withstand

    a) Lightning IMP 75 75 75 75 125 125 170 170


    b) Power frequency 28 28 28 28 50 50 70 70
    c) Switching IMP - - - - - - - -
    13 Partial Discharge Less than 50 pC
    14 PR Relief Class Class A
    15 PR Relief Class KA (RMS) 40 KA
    16 Total creepage Distance in 270 270 300 300 600 600 900 900
    mm
    17 Max. Cant. Strength in 325 325 325 325 325 325 325 325
    KGM

    TECHNICAL PARTICULARS OF STATION CLASS ARRESTERS FROM


    132 TO 400 KV

    Sl. Particulars System Voltages in KV


    No 66 66 110 132 220 220 400 400
    1 Rating KV (RMS) 60 60 96 120 198 216 360 390
    2 MCOV (RMS) 51 51 81 102 168 175 292 303
    3 Discharge Current 10 KA
    4 Line Discha. class 2 3 3 3 3 3 3 3/4
    5 Frequency 50HZ
    Less than 500 micro Amps.
    a) IR at MCOV Less than 400 µAmps.
    b) IG at MCOV About 1500 micro Amps.
    About 1200 µAmps.
    6 a) Reference Current, mA 1 to 5 mA

    b) Reference Volt at Greater than Rated Voltage


    Reference Current
    7 Max. RDA (KV p) at
    a) 5KA 170 160 251 320 518 567 820 860
    b) 10KA 180 170 272 340 550 600 880 950
    c) 20 KA 200 119 307 380 610 668 925 1000
    8 Max. Switch IMP R V
    (KVp
    500A - - - - - - - -
    1000A 144 136 217 272 455 496 830 850
    9 Max. Steep Current 200 190 298 372 600 654 1000 1050
    Impulse RDV ( KVp)
    10 High Current Impulse
    withstand 100KAp
    11 TOV (KVp)
    i) 0.1 Sec 106 106 170 212 350 382 636 689
    ii)1.0 Sec 102 102 163 204 336 366 610 661
    iii) 10.0 Sec 98 98 156 195 322 351 585 634
    iv) 100.0 Sec 94 94 149 187 308 336 560 607
    12 Insulation Withstand
    a) Lightning IMP 325 325 550 650 1050 1050 1425 1425
    b) Power frequency 140 140 230 275 460 460 630 630
    c) Switching IMP - - - - - 700 1050 1050
    13 Partial Discharge Less than 50 pC
    14 PR Relief Class Class A
    15 PR Relief Class KA RMS) 40 KA
    16 Total creepage Distance in 1800 1800 3075 362 6125 6125 1050 10500
    mm 5 0
    17 Max. Cant. Strength in 500 500 500 100 1000 1000 1000 1000
    KGM 0

    CLASS III LIGHTINING ARRESTER


    TECHNICAL PARTICULARS Ref. Standard IEC 99-4, 1999

    72.5 145
    Sl.No Particulars Unit 36 KV KV KV 245 KV
    1 System BIL KVp 170 325 650 1050
    Rated voltage (RMS),
    2 (system voltage x √ 2) KV 30 60 120 198
      √3          
    Max. Continuous operating voltage
    3 (MCOV) KV 25 52 102 168
    4 Nominal Discharge current (NDC) KAp 10 10 10 10
    5 High current with stand KAp 100 100 100 100
    6 PROTECTION LEVELS          
      (A) Impulse residual voltage (KVp)         
      (i) Steep current @ NDC   94 185 380 600
      (ii) Lightning current          
      @ 0.5 NDC   80 156 330 510
      @ 1.0 NDC   84 165 350 550
      @ 2.0 NDC   94 185 390 610
      (iii) Switching current @ 1 KAp  70 136 290 450
      (B) Temp. Over voltage (KVp)         
      (i) For 0.1 sec   60 120 254 404
      (ii) For 1 sec   55 111 234 372
    (iii) For 10 sec   52 105 222 353
    (iv) For 100 sec   51 102 215 31
    INSULATION DATA        
    (i) Wet Power freq. Withstand KV 70 140 275 460
    (ii) Dry lightning impulse KVp 170 325 650 1050
    7 (iiI) Creepage mm 900 1800 3625 6125
    8 OVERALL DIMENSION          
      (i) Outer Dia mm 280 280 280 280
      (ii) Height mtr 0.68 0.940 1.540 2.785
      (iii) Weight Kgs 45 60 150 250
    9 MOUNTING ARRANGEMENT          
      (i) PCD mm 368 368 368 368
      (ii) No of holes   4 4 4 4
      (iii) Dia of holes mm 15 15 15 19
    10 Terminal connector          
    Single
    Single Panther Single
    (I) Suitable conductor ACSR
    zebra (66 & rabbit
    132kv)

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