3EK7 Medium Voltage Silicone Insulated Surge Arresters Answers for energy. Setting new Standards The 3EK7‘s mechanical features: Glass-collared MOV, Silicone rubber housing, FRP rods and Aluminium end fittings. Three types of 3EK7 surge arresters are available: 3EK7…-. C .. surge arresters according to IEC 60099-4 with metric thread, 3EK7...-. A .. surge arresters according to IEEE Std C 62.11 with imperial thread. For special applications: 3EK7...-. B .. surge arresters according to IEEE Std C 62.11 with metric thread. The new 3EK7 surge arrester from Siemens offers superior protection against power surges for the equipment in electrical distribution systems with operating voltages of up to 72.5 kV. Besides being highly resistant to environmental pollution of all kinds, its performance in dealing with earth faults and its excellent short-circuit ratings are setting entirely new standards. The silicone on the new 3EK7 surge arrester refuses to allow any deposits of pollution or films of moisture to form on it. Thus, surface currents caused by pollution will virtually not occur. The 3EK7 arrester is also very lightweight, robust and durable, due to its special cage design. 2 3EK7 Design M12 or 3/8 inch stainless steel stud Nut, washer Clamp End fitting Silicone housing, directly molded Metal oxide varistor MOV Glass coating FRP rods End fitting Nut, washer M12 or 3/8 inch stainless steel stud 3EK7 a top quality product The silicone rubber (SR) housing is molded directly onto the MOV blocks and the protection cage. It provides an excellent sealing system against moisture ingress and partial discharges. In addition, the MOV blocks are glass-collared to prevent aging. Highest quality materials. SR is highly hydrophobic and maintains this ability to repel water and any deposits of pollution throughout its entire service life. This results in high tracking and erosion resistance. Furthermore, the SR housing is self-extinguishing and flame-retardant. These advantages provide maintenance free and reliable service life for 3EK7 arresters. Manufacturing plants are certified under ISO 9001 and ISO 14001. 3EK7 arresters have been type tested by an independent test laboratory. Secure and reliable design The 3EK7 series is based on a cage of pre-stressed fiber-reinforced plastic rods for high mechanical strength, reducing the risk of internal components being ejected. In the extremely rare event of the resistors being overloaded, arcing cannot result in a build-up of critical internal pressure, since the resistors are not enclosed in a sealed mechanical shell. Thus, the arc can escape through the silicone sheath, leaving the mechanical support structure of the enclosure unharmed. The cage is lightweight design and yet it offers excellent torsional, tensile and cantilever strength: Maximum working cantilever strength of 350 Nm. SR is resistant to UV and ozone exposure as well as to all common organic and non-organic solvents and cleaning agents. Therefore, the 3EK7 is suitable for any environmental conditions of industrial areas as well as in desert or coastal regions. 3EK7 arresters are suitable for a temperature range from –55° C to +50° C. Application altitude up to 3600 m a.s.l. Fast delivery Flexibility in production and in our global network of service and sales facilities provide fast and prompt supply e. g. shipment ex stocks within six days after your order has been received for the surge arresters marked with asterisk (*) (Refer to table on page 4 and 6). 3 3EK7 Arresters According to IEC 60099-4 Selection and Main Data Rated voltage Ur Voltage per unit Ur 1.25 Preheating to 40° C 1.2 Arrester part number 1 kA 8/20 µs [kV cr] Preheating to 60° C and stressing with rated energy 1.15 [kV] [kV] 1.1 3 2.4 3EK7 030 -2CB4 7.0 1.05 6 4.8 3EK7 060 -2CB4 14.0 1 0.95 0.9 9* 7.2 3EK7 090 -2CB4 20.9 10.5* 8.4 3EK7 105 -2CB4 24.4 12* 9.6 3EK7 120 -2CC4 27.8 12 3EK7 150 -2CC4 34.7 18 14.4 3EK7 180 -2CD4 41.7 21* 16.8 3EK7 210 -2CD4 48.6 24 19.2 3EK7 240 -2CE4 55.5 27 21.6 3EK7 270 -2CF4 62.6 30 24 3EK7 300 -2CF4 69.3 15* 0.85 0.8 0.1 1 10 100 1000 Time in seconds Table 1: IEC power-frequency voltage versus time characteristic Nominal discharge current In 5 kA 10 kA 31.5 25.2 3EK7 315 -2CH4 72.9 Maximum continous operating voltage Uc 48 kV 48 kV 33 26.4 3EK7 330 -2CH4 76.4 36 28.8 3EK7 360 -2CH4 83.3 39 31.2 3EK7 390 -2CH4 90.5 42 33.6 3EK7 420 -2CH4 97.4 45 36 3EK7 450 -2CH4 104 48 38.5 3EK7 480 -2CK4 111 Rated voltage Ur 60 kV 60 kV Long duration current impulse 150 A 325 A High current pressure relief 20 kA 20 kA Low current pressure relief 600 A 600 A High-current impulse Maximum permisible static service load Energy absorption capability 65 kA 100 kA 280 Nm 350 Nm 400 Nm 500 Nm 51 41 3EK7 510 -2CK4 118 2.2 kJ/kV Ur 3.5 kJ/kV Ur 54 43.2 3EK7 540 -2CK4 125 57 45.6 3EK7 570 -2CK4 132 60 48 3EK7 600 -2CK4 139 Maximum permisible service load (MPSL) Table 2: 3EK7 arrester main data Highest voltage for equipment Um Rated lightning impulse withstand voltage [kV] [kV] 2.75 Solidly earthed neutral system Isolated neutral system Impedance earthed Resonant earthed neutral system neutral system 3EK7 030-.C.. 3EK7 050-.C.. 3EK7 030-.C.. 3EK7 050-.C.. 3.6 20; 40 3EK7 030-.C.. 3EK7 050-.C.. 3EK7 030-.C.. 3EK7 050-.C.. 5.5 45; 60; 75 3EK7 050-.C.. 3EK7 090-.C.. 3EK7 060-.C.. 3EK7 090-.C.. 40; 60 3EK7 060-.C.. 3EK7 090-.C.. 3EK7 090-.C.. 3EK7 090-.C.. 60; 75; 95 3EK7 105-.C.. 3EK7 090-.C.. 3EK7 105-.C.. 3EK7 150-.C.. 3EK7 120-.C.. 3EK7 150-.C.. - 3EK7 150-.C.. - 8.25 15.5 75 3EK7 090-.C.. 3EK7 090-.C.. or 3EK7 105-.C.. 3EK7 120-.C.. 15.5 85; 110 3EK7 120-.C.. 3EK7 210-.C.. 3EK7 150-.C.. 3EK7 210-.C.. 17.5 75 3EK7 150-.C.. - 3EK7 180-.C.. - 17.5 95 3EK7 150-.C.. 3EK7 220-.C.. 3EK7 180-.C.. 3EK7 220-.C.. 12 60; 75; 95 Table 4: 3EK7 nominal discharge current 5 kA Rated voltage Ur 30; 45; 60 7.2 [kV] Continuous operating voltage Uc Arrester part number 1 kA 8/20 µs [kV cr] [kV] 3 2.4 3EK7 030 -4CB4 6.6 5 4 3EK7 050 -4CB4 10.8 13.0 6 4.8 3EK7 060 -4CB4 9* 7.2 3EK7 090 -4CB4 19.4 10.5* 8.4 3EK7 105 -4CB4 22.8 9.6 12* 3EK7 120 -4CC4 25.9 15* 12 3EK7 150 -4CC4 32.3 18* 14.4 3EK7 180 -4CD4 38.8 21* 16.8 3EK7 210 -4CD4 45.3 22* 17.6 3EK7 220 -4CE4 47.5 24 95 3EK7 210-.C.. - 3EK7 240-.C.. - 24 125; 145 3EK7 210-.C.. 3EK7 300-.C.. 3EK7 240-.C.. 3EK7 300-.C.. 24* 19.2 3EK7 240 -4CE4 51.7 25 125; 145 3EK7 210-.C.. 3EK7 315-.C.. 3EK7 250-.C.. 3EK7 315-.C.. 25 20 3EK7 250 -4CE4 53.9 27 95 3EK7 210-.C.. - - - 27 21.6 3EK7 270 -4CF4 58.2 27 125 3EK7 210-.C.. - 3EK7 270-.C.. - 30* 24 3EK7 300 -4CF4 64.6 27 150 3EK7 210-.C.. 3EK7 360-.C.. 3EK7 270-.C.. 3EK7 360-.C.. 31.5 25.2 3EK7 315 -4CH4 67.9 30 160 3EK7 240-.C.. 3EK7 390-.C.. 3EK7 300-.C.. 3EK7 390-.C.. 33 26.4 3EK7 330 -4CH4 71.1 36 145 3EK7 300-.C.. - 3EK7 360-.C.. - 36* 28.8 3EK7 360 -4CH4 77.6 36 170 3EK7 300-.C.. 3EK7 450-.C.. 3EK7 360-.C.. 3EK7 450-.C.. 39 31.2 3EK7 390 -4CH4 84.2 38 125 3EK7 300-.C.. - - - 38 150 3EK7 300-.C.. - 3EK7 390-.C.. - 42 33.6 3EK7 420 -4CH4 90.7 38 200 3EK7 300-.C.. 3EK7 480-.C.. 3EK7 390-.C.. 3EK7 480-.C.. 45 36 3EK7 450 -4CH4 97.2 40.5 190 3EK7 315-.C.. 3EK7 510-.C.. 3EK7 420-.C.. 3EK7 510-.C.. 48 38.5 3EK7 480 -4CK4 104 50.5* 40.5 3EK7 505 -4CK4 107 48.3 150 3EK7 390-.C.. - - 48.3 200 3EK7 390-.C.. - 3EK7 480-.C.. - 51 41 3EK7 510 -4CK4 110 48.3 250 3EK7 390-.C.. 3EK7 600-.C.. 3EK7 480-.C.. 3EK7 600-.C.. 54 43.2 3EK7 540 -4CK4 117 52 250 3EK7 420-.C.. - 3EK7 540-.C.. - 57 45.6 3EK7 570 -4CK4 123 72.5 325 3EK7 570-.C.. - - - 60 48 3EK7 600 -4CK4 130 Table 3: Typical 3EK7 arresters for system voltages according to IEC 60099-4 4 Continuous operating voltage Uc Table 5: 3EK7 nominal discharge current 10 kA Maximum discharge voltage Creepage distance Flashover distance Lightning impulse withstand voltage Height “H” 1) Net weight Packed weight Pallet weight Qty. per pallet 3 kA 8/20 µs [kV cr] 5 kA 8/20 µs [kV cr] 10 kA 8/20 µs [kV cr] 15 kA 8/20 µs [kV cr] 20 kA 8/20 µs [kV cr] 125 A 30/60 µs [kV cr] 500 A 30/60 µs [kV cr] [mm] [mm] [kV] [mm] [kg] [kg] [kg] [pcs] 7.7 8.1 8.8 9.6 10.4 6.2 6.6 372 180 104 170 1.5 2.1 488 221 15.3 16.1 17.5 19.0 20.6 12.2 13.2 372 180 104 170 1.5 2.1 488 221 22.8 24.0 26.2 28.3 30.7 18.2 19.7 372 180 104 170 1.6 2.2 510 221 26.7 28.1 30.6 33.2 36.0 21.4 23.0 372 180 104 170 1.6 2.2 510 221 30.4 32.0 34.9 37.8 41.0 24.3 26.2 485 210 122 200 1.8 2.4 494 195 37.9 39.9 43.5 47.1 51.1 30.3 32.7 485 210 122 200 1.9 2.5 514 195 45.5 47.9 52.2 56.5 61.3 36.4 39.3 605 248 144 240 2.2 2.8 506 169 53.1 55.9 60.9 66.0 71.6 42.5 45.8 605 248 144 240 2.3 2.9 523 169 60.6 63.8 69.5 75.3 81.7 48.5 52.3 775 286 166 270 2.6 3.3 535 156 68.3 71.9 78.4 84.8 92.0 54.6 59.0 900 318 184 300 2.9 3.6 491 130 75.7 79.7 86.9 94.0 102 60.6 65.4 900 318 184 300 2.9 3.6 491 130 79.6 83.8 91.3 98.9 107 63.7 68.7 1230 418 242 400 3.7 4.4 545 117 83.4 87.8 95.7 104 112 66.7 72.0 1230 418 242 400 3.7 4.4 545 117 91.0 95.8 104 113 123 72.8 78.6 1230 418 242 400 3.8 4.5 557 117 98.8 104 113 123 133 79.0 85.3 1230 418 242 400 3.8 4.5 557 117 106 112 122 132 143 85.1 91.8 1230 418 242 400 3.9 4.6 569 117 114 120 131 142 154 91.2 98.4 1230 418 242 400 3.9 4.6 569 117 122 128 140 151 164 97.3 105 1595 520 302 510 4.8 5.6 464 78 129 136 148 161 174 103 112 1595 520 302 510 4.8 5.6 464 78 137 144 157 170 184 109 118 1595 520 302 510 4.9 5.7 471 78 144 152 166 179 195 116 125 1595 520 302 510 4.9 5.7 471 78 152 160 174 189 205 122 131 1595 520 302 510 5.0 5.8 479 78 Creepage distance Flashover distance Lightning impulse withstand voltage Height “H” 1) Net weight Packed weight Pallet weight Qty. per pallet Maximum discharge voltage 3 kA 8/20 µs [kV cr] 5 kA 8/20 µs [kV cr] 10 kA 8/20 µs [kV cr] 15 kA 8/20 µs [kV cr] 20 kA 8/20 µs [kV cr] 125 A 30/60 µs [kV cr] 500 A 30/60 µs [kV cr] [mm] [mm] [kV] [mm] [kg] [kg] [kg] [pcs] 7.1 7.5 8.1 8.7 9.3 5.8 6.2 372 180 104 170 1.5 2.1 488 221 11.7 12.4 13.3 14.4 15.3 9.4 10.1 372 180 104 170 1.6 2.2 510 221 14.2 15.0 16.1 17.4 18.5 11.4 12.2 372 180 104 170 1.6 2.2 510 221 21.1 22.3 24.0 25.9 27.6 17.0 18.2 372 180 104 170 1.7 2.3 532 221 24.7 26.1 28.1 30.3 34.6 20.0 22.7 372 180 104 170 1.7 2.3 532 221 28.2 29.8 32.0 34.6 36.8 22.7 24.3 485 210 122 200 2.0 2.6 533 195 35.1 37.1 39.9 43.1 45.9 28.3 30.3 485 210 122 200 2.1 2.7 553 195 42.2 44.5 47.9 51.7 55.1 34.0 36.4 605 248 144 240 2.4 3.0 540 169 49.2 52.0 55.9 60.4 64.3 39.7 42.5 605 248 144 240 2.5 3.1 557 169 51.6 54.5 58.6 63.3 67.4 41.6 44.5 775 286 166 270 2.8 3.5 566 156 56.1 59.3 63.8 68.9 73.4 45.3 48.5 775 286 166 270 2.8 3.5 566 156 58.5 61.8 66.5 71.8 76.5 47.2 50.5 775 286 166 270 2.9 3.6 581 156 63.3 66.9 71.9 77.7 82.7 51.0 54.6 775 318 184 300 3.2 3.9 530 130 70.1 74.1 79.7 86.1 91.7 56.6 60.6 775 318 184 300 3.2 3.9 530 130 73.7 77.9 83.8 90.5 96.4 59.5 63.7 1230 418 242 400 4.0 4.7 581 117 77.3 81.7 87.8 94.8 101 62.3 66.7 1230 418 242 400 4.1 4.8 592 117 84.3 89.1 95.8 104 110 68.0 72.8 1230 418 242 400 4.1 4.8 592 117 91.5 96.7 104 112 120 73.8 79.0 1230 418 242 400 4.2 4.9 604 117 98.6 104 112 121 129 79.5 85.1 1230 418 242 400 4.3 5.0 616 117 106 112 120 130 138 85.2 91.2 1230 418 242 400 4.4 5.1 627 117 113 119 128 138 147 90.9 97.3 1595 520 302 510 5.2 6.0 495 78 116 123 132 143 152 93.7 100 1595 520 302 510 5.3 6.1 503 78 120 127 136 147 156 96.6 103 1595 520 302 510 5.3 6.1 503 78 127 134 144 156 166 102 109 1595 520 302 510 5.4 6.2 510 78 134 141 152 164 175 108 116 1595 520 302 510 5.5 6.3 518 78 141 149 160 173 184 114 122 1595 520 302 510 5.6 6.4 526 78 1) Refer to figure 1 on page 8 (*) Available ex stock 5 3EK7 Arresters According to IEEE Std C 62.11 Selection and Main Data Duty cycle MCOV Arrester part number FOW [kV] [kV] 1.9 3 2.55 3EK7 030 -2AB4 10.0 8.2 1.8 6 5.1 3EK7 060 -2AB4 20.0 16.3 Voltage per unit MCOV 3EK7 heavy duty 1.7 9* 3EK7 riser pole 10* 1.6 7.65 3EK7 090 -2AB4 30.0 24.5 8.4 3EK7 100 -2AB4 33.3 27.2 31.7 12 10.2 3EK7 120 -2AC4 38.8 15 12.7 3EK7 150 -2AC4 48.4 39.6 1.4 18* 15.3 3EK7 180 -2AD4 57.2 46.8 1.3 21 17 3EK7 210 -2AD4 66.8 54.6 1.2 24 19.5 3EK7 240 -2AE4 73.9 60.4 68.0 1.5 27* 1.1 1 0.01 0.1 1 10 100 1000 10000 Time in seconds Table 6: ANSI temporary overvoltage, preheating 60˚ C, no prior duty 22 3EK7 270 -2AF4 83.1 30 24.4 3EK7 300 -2AF4 92.3 75.6 33 27.5 3EK7 330 -2AH4 102 83.1 36 29 3EK7 360 -2AH4 111 90.7 FOW 1.5 kA 8/20 µs [kV cr] Table 9: 3EK7 normal duty Duty cycle MCOV Arrester part number Normal duty Heavy duty Riser pole Maximum continous operating voltage MCOV 29 kV 29 kV 29 kV Duty cycle voltage 36 kV 36 kV 36 kV [kV] [kV] Low-current, long-duration 75 A 250 A 250 A 3* 2.55 3EK7 030 -3AB4 10.5 8.0 High current pressure relief 20 kA 20 kA 20 kA 6* 5.1 3EK7 060 -3AB4 21.6 16.5 Low current pressure relief 600 A 600 A 600 A 9* 7.65 3EK7 090 -3AB4 30.9 23.6 High-current, short-duration 65 kA 100 kA 100 kA 10* 8.4 3EK7100 -3AB4 32.3 24.7 5 kA 10 kA 10 kA 12 10.2 3EK7120 -3AC4 41.0 31.3 39.1 Coordinating current Maximum design cantilever load-static (MDCL) Energy absorption capability 280 Nm 280 Nm 280 Nm 15* 12.7 3EK7 150 -3AD4 51.3 4.6 kJ/kV MCOV 4.6 kJ/kV MCOV 18* 15.3 3EK7 180 -3AD4 61.5 47.0 21* 17 3EK7 210 -3AE4 67.3 51.4 59.2 24 System L-L Voltage [kV] Four-wire multigrounded neutral wye Three-wire low impedance grounded neutral circuit Three-wire high impedance grounded neutral circuit 3EK7 030-.A.. 3EK7 060-.A.. 3EK7 060-.A.. 2.4 4.16 3EK7 030-.A.. 4.26 3EK7 060-.A.. 4.8 3EK7 060-.A.. 19.5 3EK7 240 -3AF4 77.6 27* 22 3EK7 270 -3AF4 87.7 66.9 30* 24.4 3EK7 300 -3AH4 96.6 73.8 33 27.5 3EK7 330 -3AH4 108 82.7 36 29 3EK7 360 -3AH4 119 90.6 FOW 1.5 kA 8/20 µs [kV cr] Table 10: 3EK7 heavy duty Duty cycle MCOV Arrester part number 3EK7 090-.A.. 6.9 3EK7 060-.A.. 3EK7 090-.A.. 3EK7 120-.A.. 20.78 3EK7 090-.A.. 3EK7 090-.A.. or 3EK7 100-.A.. 3EK7 100-.A.. 3EK7 100-.A.. or 3EK7 120-.A.. 3EK7 150-.A.. 22.86 8.3 [kV cr] 2.7 kJ/kV MCOV Table 7: 3EK7 distribution arrester main data [kV] [kV] 3 2.55 3EK7 030 -4AB4 8.9 6.8 3EK7 150-.A.. 6 5.1 3EK7 060 -4AB4 17.7 13.5 7.65 3EK7 090 -4AB4 26.4 20.2 3EK7 150-.A.. 10* 8.4 3EK7 100 -4AC4 29.3 22.3 12 10.2 3EK7 120 -4AD4 35.2 26.9 15 12.7 3EK7 150 -4AD4 43.9 33.5 3EK7 210-.A.. 18* 15.3 3EK7 180 -4AE4 52.7 40.2 3EK7 150-.A.. 3EK7 210-.A.. 21 17 3EK7 210 -4AF4 61.5 47.0 24 19.5 3EK7 240 -4AH4 70.2 53.6 24.94 3EK7 180-.A.. 3EK7 270-.A.. 27* 22 3EK7 270 -4AH4 79.1 60.4 27.6 3EK7 210-.A.. 3EK7 300-.A.. 30 24.4 3EK7 300 -4AH4 87.7 66.9 34.5 3EK7 270-.A.. 3EK7 360-.A.. 33 27.5 3EK7 330 -4AK4 96.6 73.8 36 29 3EK7 360 -4AK4 105 80.5 12 12.47 13.2 13.8 9* 3EK7 150-.A.. 23 3EK7 180-.A.. 3EK7 300-.A.. Table 8: Typical 3EK7 arresters for system voltages according to the latest IEEE Std C 62.11 6 [kV cr] 1.5 kA 8/20 µs [kV cr] [kV cr] Table 11: 3EK7 riser pole Maximum discharge voltage Creepage distance Flashover distance Lightning impulse withstand voltage Height “H” 1) Net weight Packed weight Pallet weight Qty. per pallet [pcs] 3 kA 8/20 µs [kV cr] 5 kA 8/20 µs [kV cr] 10 kA 8/20 µs [kV cr] 20 kA 8/20 µs [kV cr] 40 kA 8/20 µs [kV cr] 125 A 45/90 µs [kV cr] 500 A 45/90 µs [kV cr] [mm] [mm] [kV] [mm] [kg] [kg] [kg] 8.6 9.1 9.9 11.6 14.0 6.9 7.4 372 180 104 170 1.4 1.6 393 240 17.3 18.2 19.8 23.3 28.0 13.8 14.9 372 180 104 170 1.4 1.6 406 240 25.9 27.2 29.7 34.9 42.0 20.7 22.3 372 180 104 170 1.5 1.7 419 240 28.8 30.3 33.0 38.8 46.6 23.0 24.8 372 180 104 170 1.6 1.7 426 240 33.5 35.2 38.4 45.1 54.3 26.8 28.9 485 210 122 200 1.8 2.0 375 180 41.8 44.0 48.0 56.4 67.8 33.5 36.1 485 210 122 200 1.8 2.1 385 180 49.4 52.0 56.7 66.6 80.1 39.5 42.7 605 248 144 240 2.2 2.4 444 180 57.7 60.7 66.2 77.7 93.5 46.1 49.8 605 248 144 240 2.2 2.4 454 180 63.8 67.2 73.2 86.0 103 51.0 55.1 775 286 166 270 2.5 2.7 510 180 71.8 75.6 82.4 96.7 116 57.4 62.0 900 318 184 300 2.8 3.1 383 120 79.7 83.9 91.5 107 129 63.8 68.8 900 318 184 300 2.9 3.1 390 120 87.7 92.3 101 118 142 70.2 75.7 1230 418 242 400 3.7 3.9 483 120 95.7 101 110 129 155 76.6 82.6 1230 418 242 400 3.7 3.9 489 120 Creepage distance Flashover distance Lightning impulse withstand voltage Height “H” 1) Net weight Packed weight Pallet weight Qty. per pallet Maximum discharge voltage 3 kA 8/20 µs [kV cr] 5 kA 8/20 µs [kV cr] 10 kA 8/20 µs [kV cr] 20 kA 8/20 µs [kV cr] 40 kA 8/20 µs [kV cr] 125 A 45/90 µs [kV cr] 500 A 45/90 µs [kV cr] [mm] [mm] [kV] [mm] [kg] [kg] [kg] [pcs] 8.4 8.8 9.5 10.9 12.6 6.7 7.2 372 180 104 170 1.5 1.7 412 240 17.2 18.2 19.6 22.5 26.1 13.9 14.9 372 180 104 170 1.6 1.7 433 240 24.7 26.1 28.1 32.3 37.4 20.0 21.4 372 180 104 170 1.7 1.8 451 240 25.9 27.3 29.4 33.8 39.1 20.9 22.3 372 180 104 170 1.7 1.9 462 240 32.8 34.7 37.3 42.9 49.6 26.5 28.3 485 210 122 200 2.0 2.2 408 180 41.0 43.3 46.6 53.6 62.0 33.1 35.4 605 248 144 240 2.4 2.5 472 180 49.2 52.0 55.9 64.3 74.3 39.7 42.5 605 248 144 240 2.5 2.7 497 180 53.9 56.9 61.2 70.4 81.4 43.5 46.5 775 286 166 270 2.8 3.0 559 180 62.0 65.6 70.5 81.1 93.8 50.1 53.6 900 318 184 300 3.1 3.3 417 120 70.1 74.1 79.7 91.7 106 56.6 60.6 900 318 184 300 3.2 3.5 433 120 77.3 81.7 87.8 101 117 62.3 66.7 1230 418 242 400 4.0 4.2 523 120 86.6 91.5 98.4 113 131 69.9 74.8 1230 418 242 400 4.1 4.3 536 120 94.9 100 108 124 143 76.5 81.9 1230 418 242 400 4.2 4.5 556 120 Creepage distance Flashover distance Lightning impulse withstand voltage Height “H” 1) Net weight Packed weight Pallet weight Qty. per pallet Maximum discharge voltage 3 kA 8/20 µs [kV cr] 5 kA 8/20 µs [kV cr] 10 kA 8/20 µs [kV cr] 20 kA 8/20 µs [kV cr] 40 kA 8/20 µs [kV cr] 125 A 45/90 µs [kV cr] 500 A 45/90 µs [kV cr] [mm] [mm] [kV] [mm] [kg] [kg] [kg] [pcs] 7.1 7.5 8.1 9.3 10.8 5.8 6.2 372 180 104 170 1.4 1.7 415 240 14.2 15.0 16.1 18.5 21.4 11.4 12.2 372 180 104 170 1.5 1.8 437 240 21.1 22.3 24.0 27.6 31.9 17.0 18.2 372 180 104 170 1.6 1.8 447 240 23.4 24.7 26.6 30.6 35.4 18.9 20.2 485 210 122 200 1.7 1.8 458 240 28.2 29.8 32.0 36.8 42.6 22.7 24.3 605 248 144 240 1.9 2.1 524 240 35.1 37.1 39.9 45.9 53.1 28.3 30.3 605 248 144 240 2.3 2.5 611 240 42.2 44.5 47.9 55.1 63.7 34.0 36.4 775 286 166 270 2.4 2.7 494 180 49.2 52.0 55.9 64.3 74.3 39.7 42.5 900 318 184 300 2.8 3.0 551 180 56.1 59.3 63.8 73.4 84.9 45.3 48.5 1230 418 242 400 3.0 3.3 413 120 63.3 66.9 71.9 82.7 95.6 51.0 54.6 1230 418 242 400 3.2 3.5 430 120 70.1 74.1 79.7 91.7 106 56.6 60.6 1230 418 242 400 4.0 4.2 522 120 77.3 81.7 87.8 101 117 62.3 66.7 1595 520 302 510 4.2 4.4 544 120 84.3 89.1 95.8 110 127 68.0 72.8 1595 520 302 510 4.3 4.5 555 120 1) Refer to figure 1 on page 8; (*) Available ex stock 7 Drawings and Accessories 33 64 23.5 39.5 14 ∅ 12.5 52.5 50.5 ∅ 45 171 125 20 41 75 26 ∅ 14 38 H* Figure 2: NEMA insulating bracket for Ur ≤ 21 kV Order code P12; 0.25 kg 33 64 23.5 39.5 36 M12 or 3/8” 26 14 ∅ 12.5 52.5 256 210 20 41 75 ∅ 119 ∅ 14 Figure 1: 3EK7 surge arrester main dimensions * please see tables on page 5 or 7 Figure 3: NEMA insulating bracket for Ur > 21 kV Order code P12; 0.4 kg 299 258 214 173 Figure 4: DIN insulating bracket for Ur ≤ 21 kV Order code P22; 0.85 kg 8 17 26 14.5 24 60 17 26 14.5 24 15 15 Figure 5: DIN insulating bracket for Ur > 21 kV Order code P22; 1 kg 60 12 12 14.5 12 75 16 60 30 26 8 ∅ 13 15 ∅ 13 197 20 ∅ 14 13 40 30 33 152 Figure 6: L-bracket Order code M12; 0.1 kg Figure 7: DIN metal bracket (stainless), Order code P23; 0.6 kg and DIN metal bracket (hot dip galvanised), Order code P21; 0.6 kg ∅ 14 or 10.2 ∅ 14 50 25 ∅ 13 13 ∅ 450 152 202 Figure 8: Insulated ground lead/Insulated line lead Order code P51/M51; 0.09 kg, 16 mm2 Figure 9: NEMA metal bracket (hot dip galvanized) Order code P11; 0.6 kg 221 (8.7”) 20 43 41 Figure 10: Transformer bracket 8.7” Order code Q11; 0.6 kg 20 40 14.3 43 64 57 20 43 40 25 64 57 20 14.3 41 25 78 78 18 18 178 14 280 (11”) 14 145 43 Figure 11: Transformer bracket 11” Order code Q12; 0.7 kg 9 Drawings and Accessories 35 18 18 46 25 86 64 69 54 55 40 86 40 14.3 41 63 57 40 14.3 14 78 14 368 (14.5”) 327 20 43 19 43 Figure 12: Transformer bracket 12.25” Order code Q13; 0.8 kg 40 55 Figure 13: Transformer bracket 14.5” Order code Q14; 0.8 kg ∅ 14 142 0 3x 227 12 0° 66 71 15.2 198 10.5…150 18 220 20 4 0…120 25 ∅ 73 ∅ 18 253.5 Figure 14: NEMA X-arm bracket Order code Q51; 1.3 kg Figure 15: Mounting plate, 37 mm height Order code Q81; 1.6 kg cable ∅ 8…∅ 14 24.5 57 ∅1 cable ∅ 14…∅ 18 ∅ 75 Figure 16: Line clamp Order code M11; 0.1 kg 10 Figure 17: Bird protection cap Order code M81; 50 g 5 76 310 (12.25”) 178 ∅ 12 .5 4 24 45 Figure 18: Stainless steel cap Order code M71; 5 g M12 or 3/8” Figure 19: Disconnector Order code P31; 0.1 kg Outline drawings for common design options are shown in figure 20, 21 and 22 Figure 20: 3EK7 surge arrester with Figure 21: 3EK7 surge arrester with accessories P12 and P31 accessories P12, P31 and Q51 Figure 22: 3EK7 surge arrester with accessories P12, P31, P52 and Q11 11 Example Part number 3 E K 7 300 3 E K 7 Internal use 300 Rated voltage in kV x 10 – Classification Nominal discharge current In = 5 kA or distribution class, normal duty Distribution class, heavy duty Nominal discharge current In = 10 kA or riser pole Standard IEEE Std C 62.11 with imperial-thread terminals IEEE Std C 62.11 with metric-thread terminals IEC - 60099-4 with metric-thread terminals Housing size 170 mm 200 mm 240 mm 270 mm 300 mm 400 mm 510 mm Internal use – 4 C F 4 – 2 3 4 A B C B C D E F H K 4 Standard equipped at high voltage terminal M12 or 3/8 inch stud with clamp, washer and nut earthing terminal M12 or 3/8 inch stud with washer and nut Example Part number with mounting accessories For additional parts only* High-voltage terminal equipped with Line clamp, washer, nut L-bracket, washer, nut Line lead, insulated, 450 mm/18 inch, 16 mm2 Stainless steel cap Bird-protection cap Earth terminal equipped with NEMA metal bracket (hot dip galvanized steel) NEMA insulating bracket DIN metal bracket (hot dip galvanized steel) DIN insulating bracket DIN metal bracket (stainless steel) Disconnector Ground lead, insulated, 450 mm/18 inch, 16 mm2 Mounting auxiliaries Transformer bracket 8.7 inch Transformer bracket 11 inch Transformer bracket 12.25 inch Transformer bracket 14.5 inch X-arm bracket Mounting plate for 200 mm and 10 inch bolt circle 3 E K 7 300 – 4 C F 4 – Z Z M51 M81 P12 P31 M11 M12 M51 M71 M81 P11 P12 P21 P22 P23 P31 P51 Q11 Q12 Q13 Q14 Q51 Q81 *Other additional parts on request Not all combinations are possible Published by and copyright © 2008: Siemens AG Energy Sector Freyeslebenstrasse 1 91058 Erlangen, Germany Please contact us at: Phone: +49 (30) 3 86-33 222 E-mail: [email protected] Siemens AG Energy Sector Power Transmission Division High Voltage Products Nonnendammallee 104 13623 Berlin, Germany www.siemens.com/arrester-download www.siemens.com/energy Power Transmission Division Order No. E50001-G630-A110-X-4A00 Printed in Germany Dispo 30000 TH 263-081130 470044 PA 11080.5 Printed on elementary chlorine-free bleached paper. All rights reserved. Trademarks mentioned in this document are the property of Siemens AG, its affiliates, or their respective owners. Subject to change without prior notice. The information in this document contains general descriptions of the technical options available, which may not apply in all cases. The required technical options should therefore be specified in the contract.