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ABB UniSec Manual

Manual is about: Air-insulated switchgear

Summary of UniSec

  • Page 1

    Medium voltage products unisec installation manual safety 3 for your safety! 3 skilled personnel 3 crucial information 3 contact us! 3 1. Introduction 4 1.1 general aspects 4 1.2 installation manual 4 2. Product information 5 2.1 unit dimensions 5 2.2 weights 6 3. Transport and storage 7 3.1 conditi...

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    3 warning make sure that the specified electrical ratings are not exceeded under switchgear operating conditions. Keep the manuals accessible to all personnel involved in installation, operation and maintenance. The user’s personnel are responsible for all matters regarding safety in the workplace a...

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    4 1. Introduction 1.1 general aspects unisec is an air-insulated switchgear for indoor use, designed for medium voltage secondary distribution. Unisec switchgear is the result of continuous innovation, following the desire to meet ever-changing market needs. This new series of switchgear offers a wi...

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    5 375 500 750 600 750 1188 1037 117.5 33.5 1700 335 2035 1215 110 1700 1870 1918 2.1 unit dimensions drawings the following drawings illustrate the main dimensions and space requirements of the different units. 2. Product information front views of the various units figure 1. Sdc 375 figure 2. Sfc 5...

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    6 1180 171 1868 600 194.5 1037 1139.5 102.5 1167 1200 33 2000 1300 1267 33 2000 2.2 weights the following table shows the maximum weights of the different units. Unit (mm) weight (kg) 375 250 500 400 600 800 750 600/750 (*) (*) wbc @ 24 kv table 1. Maximum weights of units figure 8. With large auxil...

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    7 3. Transport and storage packing materials table 2. Lists all the packing materials used in the switchgear: raw material possible recycling method plywood recycling or disposal unplaned wood products recycling or disposal antistatic polythene film recycling or disposal polythene shrink wrap recycl...

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    8 figure 14. Bolt inside the unit (right side) 3.3 handling the units as far as the instal- lation site 3.3.1 general warnings and cautions 3.3.2 instructions transport units the transport units consist of individual units or small groups of units. The lifting hooks are suitable for all unisec units...

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    9 switchgear ready for lifting: lifting hooks installed figure 19. 375 mm, 500 mm and 600 mm unisec units figure 20. 750 mm unisec unit lifting dimensions and angle when lifting using a crane, proceed as follows: a) fit lifting ropes of an appropriate load capacity with spring catches. B) keep an an...

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    10 3.4 temporary storage 3.4.1 general warnings and cautions caution the packing must be kept indoors immedi- ately after arrival. The conditions must meet the environmental requirements of the iec 60721-3-1 standard, classification 1k3. Caution the vapour corrosion inhibitors placed in the units fo...

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    11 (*) (*) (*) 4. Assembly of the switchgear on site warning in order to obtain an optimal installation sequence and ensure high-quality standards, on-site installation of the switchgear must only be carried out by specially trained and skilled personnel, or at least by personnel supervised and moni...

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    12 200 375 85 90 43.5 43.5 158.5 248 Ø12.5 600 1037 189 78.5 958.5 200 500 147.5 152.5 43.5 43.5 158.5 248 Ø12.5 600 1037 189 78.5 958.5 100 150 25 25 158.5 248 Ø12.5 600 1037 4.3.2 cable passage hole dimensions and fixing points the following figures show the locations and sizes of the cable passag...

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    13 200 355 195 43.5 43.5 158.5 248 Ø12.5 600 1037 189 78.5 958.5 200 750 275 275 43.5 43.5 158.5 248 Ø12.5 600 1037 189 78.5 958.5 400 600 100 100 43.5 43.5 10 301.5 Ø12.5 753 230 1200 800 125 81 550 750 100 100 43.5 43.5 10 301.5 773 230 1300 800 125 81 25 Ø12.5 figure 30. 750 mm wide units figure ...

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    14 4.3.3 medium voltage cable locations and lengths the medium voltage cable lengths (distance of the cable con- nection point from the floor) depend on the units and acces- sories used. The following figures and table show the cable lengths and locations for the different units. Table 4. Medium vol...

  • Page 15

    15 4.4 foundations 4.4.1 foundation types general aspects the switchgear must be erected on a foundation that fulfils the requirement of a 2 mm maximum horizontal height deviation in relation to the length and diagonal of the switchgear. As it is difficult to make a concrete foundation that fulfils ...

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    16 figure 38. 375 mm wide units figure 39. 500 mm wide units 4.5.3 connecting the units note: for sbr units, do not remove the roof frame. Installation foresees the following operations: a) align two units side by side. Before pushing the two units com- pletely together, make sure that the lower joi...

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    17 figure 43. Screw for the lower joining plate d) slide the joining plate to the fixing point of the units (on the inner rear wall). Figure 44. Installation of top joining plate e) screw the joining plate and the unit plates together (with 6 torx m6x12 screws) so that they are fully tightened. Inse...

  • Page 18

    18 figure 49. Screw positions for wbc – wbs units 4.5.4 assembling the remaining switchgear units after connecting two units, bring the third unit to the place of installation. Then repeat the following operations: a) removing the roof plates b) connecting the units c) repeat the same operations for...

  • Page 19

    19 the busbar connections are made through the top openings a) clean and scrape the busbar connections. B) clean the insulation of the busbar sections with a soft, dry cloth and check for any insulation damage. C) install the busbars unit by unit. Insert the screws, busbars and other required compon...

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    20 figure 52. Example of main busbar connections for 3 sdc 375 units (with 12-17.5 kv) note insulating terminal covers are installed in the end units. For 24 kv, a rubber terminal cap is installed in all the units. Note make sure the busbar spacers are positioned as shown in the figures below. The f...

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    21 1 12 11 3 12 9 14 11 7 8 7 1 8 11 12 7 3 12 8 9 11 14 7 3 12 8 9 11 14 4 12 11 6 12 10 9 14 11 6 12 10 9 14 11 7 8 units with 12-17.5 kv, 630 a switch-disconnector figure 61. 12-17.5 kv, 800 a end unit figure 53. 12-17.5 kv, 630 a middle unit figure 54. 12-17.5 kv, 630 a end unit figure 55. 12-17...

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    22 2 12 14 12 13 11 15 2 12 14 12 13 11 15 7 4 12 8 9 14 11 13 12 15 7 8 7 4 12 8 9 11 14 12 13 15 7 8 5 12 11 14 12 13 15 5 12 14 11 12 13 15 drs/drc end or isolating units for drc and drs units, the busbars are not installed directly on the top of the switch-disconnector or bushing. Therefore to t...

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    23 1 12 11 12 13 15 7 1 8 12 12 13 11 15 7 8 3 12 12 13 15 12 16 11 11 12 16 11 11 figure 68. 12-17.5 kv, 630 a middle unit drc 12-17.5 kv, 630 a middle unit drc 24 kv, 630 a middle unit figure 69. 24 kv, 630 a middle unit drc 12-17.5 kv, 800 a middle unit figure 70. 12-17.5 kv, 800 a middle unit fo...

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    24 12 16 11 11 12 16 11 11 19 11 20 20 17 a b c 11 b 17 20 11 20 19 17 20 11 20 19 units with current transformers and combisensors figure 73. Busbar exit on the left figure 74. Busbar exit on the right figure 75. 630 a middle unit figure 76. 1250 a middle unit wbc - wbs, 630 a middle unit wbc - wbs...

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    25 11 19 23 3 12 14 3 12 11 11 14 23 19 22 19 21 11 11 3 12 14 4 12 11 22 19 21 11 11 panel for coupling unit with wbc – wbs to unit with 12 - 17.5 kv, 630 a switch-disconnector figure 79. 12 -17.5 kv, 630 a middle unit figure 80. 12-17.5 kv, 630 a end unit panel for coupling unit with wbc – wbs to ...

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    26 4.5.7 re-installing the roof plates the installation operations are as follows: 1) install the roof plate. 2) remount the screws detached during dismantling. 3) for the end and isolating units: install the double roof plate with the fire protection plates on top of the normal roof frames. No plat...

  • Page 27

    27 c) insert screws in the vertical duct (6 torx m6x20 screws) and in the bottom plate (5 torx m6x12 screws), and tighten them as shown in figure 87. Figure 87. Screws for the vertical duct and bottom plate d) screw 3 additional screws (torx m6x12) in the bottom plate as shown in figure 88. Figure 8...

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    28 figure 91. Installed gas vent duct 4.6.2 connecting the gas vent ducts a) install the lower locking bracket figure 92. Lower locking bracket b) install the upper locking bracket bar and screw up the screws (2 hexagonal bolts with flange m6x10) figure 93. Upper locking bracket figure 94. Installat...

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    29 figure 96. Figure 97. 4.7 coupling the units with switch- disconnector to wbc-wbs units units up to 17.5 kv.

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    30 4.8 coupling the units with switch- disconnector to wbc unit 24 kv figure 98. Figure 99..

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    31 5 4 3 1 2 1 3 2 4 figure 101. Medium voltage cable cover 1. Cable cover 2. Cable seal 3. Cable support 4. Hexagonal nuts with flange 9ada289 m6 - steel 8 a2f 5. Cheese-head torx plus screw. Screw m6x12 fastite200005hq -ba operations 1 . Dismantle the cable clamps, cable guide splines, fairleads a...

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    32 4 . Floor plates and cable guide splines figure 105. Floor plates a) insert the floor plates, fairleads, cable clamps and cable guide splines, together with 8 nuts, on the floor of the unit as shown in figure 106. Note in the case of a circuit-breaker, fit the floor plates as far apart from each ...

  • Page 33

    33 5 . Cable clamps a) re-install the loose parts as shown in figure 107. Figure 107. Installing the loose parts of the cable clamps b) tighten all 6 nuts. Note tighten to the correct torque! See the tight- ening torques table at the end of the manual! 5.1.2 installing the cables in the rlc unit rlc...

  • Page 34

    34 4) unscrew, lift and remove the cable protection sheet of the rlc unit. Figure 113. Rlc internal cover connect the mv cables. 1) cut the cable glands at the bottom of the rlc unit according to the cable diameter and fix the cables in the centre of the rlc unit to the locking part. Figure 114. Rlc...

  • Page 35

    35 a a1 c c1 b b1 c2 (on both sides) figure 115. Cable glands on the bottom of the rlc unit figure 116. Exploded drawing of the cable locking parts on the bottom of the rlc unit 2) connect the cables to the circuit busbar. Figure 117. Rlc unit cable terminal connections 3) connect the cable earthing...

  • Page 36

    36 d e f g h d d1 e d2 e3 e1 e2 h h1 c) if supplied, remove plate d of the voltage transformers (vt) by unscrewing screws d1 and d2 (depend on the type of vt). D) if supplied, remove surge arrester e by unscrewing screws e1, e2 and e3. Figure 121. E) connect the mv cables h using the h1 bolts. Figur...

  • Page 37

    37 5.2 control cables the internal cables between units are easily laid through open- ings in the side walls of the auxiliary circuit compartment. Depending on the delivery times, there are two different proce- dures for supplying the connection cables of the units: • cables not included • cables su...

  • Page 38

    38 note tightening must be carried out with the correct torque. 5.3.2 main earthing circuit connections between the panels of the sbr functional unit a) install the protection busbar conductor between panels of the sbr functional unit. Figure 130. Sbr unit protection busbar conductor b) connect the ...

  • Page 39

    39 hexagonal-head bolts with flange max. Tightening torque [nm] type steel class 90 m5 9 m6 16 m8 34 m10 58 m12 97 m16 215 cheese-head torx fastite screw max. Tightening torque [nm] type steel class 8.8 m6 20 the values in the tables must be used unless the torque is specified in the table of joint ...

  • Page 40

    40 joint type tightening torque [nm] m5 m6 m8 m10 m12 m16 1 bolts mounted on the ct, tpu type min 2.8 16 56 nominal max 3.5 20 70 2 bolts mounted on electrical pliers min 8 nominal 9 max 10 3 cable connection nut min 18 35 65 170 nominal 20 40 70 180 max 22 45 75 190 4 busbar connections min 18 35 6...

  • Page 41

    41 joint type tightening torque [nm] m5 m6 m8 m10 m12 m16 6 bolts mounted on the mandolin ct min nominal 35 max 7 bolts mounted on the post insulator min 25 nominal 9 20 30 max 31 8 bolts mounted on the connection and switching busbar min 56 nominal 35 60 max 70 9 bolts for mounting ct min nominal 4...

  • Page 42

    42 b. Tools required for installation torx wrench • tx30 torx wrench allen wrenches • 5 mm • 6 mm • 8 mm socket wrenches • 10 mm • 15 mm • 17 mm • 19 mm ring spanner • 13 mm.

  • Page 44

    1vfm200004 – rev . G, en – installation manual – 2012.01 (unisec) (m t) your sales contact: www.Abb.Com/contacts more product information: www.Abb.Com/productguide for more information please contact: the data and illustrations are not binding. We reserve the right to make changes in the course of t...