HSP STARIS Sia+ Installation, Operating And Maintenance Instructions Download Page 47

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7.3.5 Voltage tap
All bushings in the range

Sia+

having a nominal voltage greater than 69 kV have a voltage

tap.

Fig. 21: Voltage tap (example illustration)

Item

Part

Item

Part

Insulated bushing with pin

Removable cap

Voltage tap

Grounding contact

Oil filling hole

O-ring

The penultimate grading layer of the capacitive grading is directed out using the voltage tap

(2), with the help of an insulated bushing (1).
The removable cap (4) has an o-ring seal (6) to ensure that the inner space of the voltage tap

remains free from humidity.
In operation, the screwed-on removable cap grounds the pin with the help of a grounding

contact (5).
► Connect the measuring lead to the pin.
► Carry out the measurements.

Range STARIS®-Sia+

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Summary of Contents for STARIS Sia+

Page 1: ...Installation operating and maintenance instructions Transformer bushing Range STARIS Sia Version 01 11 20 en US ...

Page 2: ...e from electrocution 8 2 3 2 Crush and impact danger from suspended loads 8 2 4 Obligations of the integrator operator 9 2 4 1 Action in the event of fire 9 2 4 2 Action in the event of an accident 9 2 5 Qualification of the personnel 10 2 6 Personal protection equipment 10 3 Structure 12 3 1 General structure 12 3 1 1 Version with draw lead bolt or detachable conductor bolt 13 3 1 2 Version with ...

Page 3: ... the bushing with draw lead bolt detachable conductor bolt 32 5 2 7 Connecting undetachable conductor bolt to the transformer connection option 2 34 5 2 8 Screwing the bushing to the transformer 36 5 2 9 Grounding the bushing flange 36 5 3 Post installation tasks 37 5 3 1 Releasing the ring screws 37 6 Preparation for commissioning 38 6 1 Filling the transformer 38 6 2 Venting the bushing 38 6 3 C...

Page 4: ...ge 50 9 1 Standard storage 50 9 2 Long term storage 50 10 Disposal 51 10 1 Constituent parts of the bushing 51 11 Standard torques 52 11 1 Standard torques 52 11 2 Standard torques for air release screws 52 Range STARIS Sia 4 53 ...

Page 5: ...is document 1 1 1 Descriptions Descriptions are normal running text 1 1 2 Instructions Instruction Sub instruction Reaction of product to instruction 1 1 3 Cross references Chap XX on Page YY Reference to a different chapter 1 1 4 Lists Bullet point 1st level Bullet point 2nd level Bullet point 1st level for instructions Range STARIS Sia 5 53 ...

Page 6: ...of documents This documentation and all its associated applicable documents must be stored in the vicinity of the product and be accessible to the personnel 1 3 Validity of instructions These instructions apply exclusively to the type range STARIS Sia 1 4 Target groups These instructions are directed to expert operatives Integrator of the bushing Installation and maintenance personnel Range STARIS...

Page 7: ...anger defense CAUTION This warning instruction indicates a dangerous situation which may lead to slight or medium severity accident if it is disregarded Handling instruction for danger defense NOTICE This warning instruction indicates a dangerous situation which may result in material damage if it is disregarded Handling instruction for danger defense Information and tips 2 2 Intended use In the e...

Page 8: ...vent of non intended use The operator bears the risk exclusively 2 3 General safety instructions There are dangers associated with the bushings Observe all the regulations that apply to the following areas Electrical voltages Moving machines Heavy weights Moving masses Injury caused by slipping tripping and falling down Observe all the relevant local regulations and legal stipulations Observe the ...

Page 9: ...nel are trained in first aid Provision of appropriate personal protection equipment Make sure that all safety devices are always present and are operating Regular training of the personnel in the following subjects Observance and use of all instruction documents Intended use of the product Knowledge of all safety devices and safety signs at the operating location Observance of the legal regulation...

Page 10: ...rt technical knowledge In order to ensure operational safety only expert operatives or a technically trained person is allowed to work on the product The personnel must be able to evaluate the tasks allocated to him to recognize possible dangers and to take the appropriate safety measures The integrator operator must ensure the qualification of the personnel 2 6 Personal protection equipment The i...

Page 11: ...ion safety goggles possibly close fitting Hand protection for protection from mechanical and chemical dangers Foot protection safety shoes For additional special local dangers Additional appropriate protection equipment Range STARIS Sia 11 53 ...

Page 12: ...tructure and design of the bushing 3 1 General structure Fig 1 Structure of the bushing Item Part Item Part 1 Connection terminal outdoor side 4 Flange 2 Head 5 Insulating body 3 Isolator 6 Connection transformer side Range STARIS Sia 12 53 ...

Page 13: ...raw lead bolt or detachable conductor bolt Fig 2 Version with draw lead bolt or detachable conductor bolt 3 1 2 Version with undetachable conductor bolt Fig 3 Version with undetachable conductor bolt Range STARIS Sia 13 53 ...

Page 14: ...3 2 Design Fig 4 Bushing design example Range STARIS Sia 14 53 ...

Page 15: ...ith epoxy resin under a vacuum The grading layers are coaxially placed aluminum foils 13 which effect even voltage distribution on the insulating body Bushings with undetachable conductor bolts do not have a central tube 12 Composite insulator The insulating body is incorporated in a composite insulator 3 The composite insulator consists of Filament winding tube Silicone sheds connected to the epo...

Page 16: ...e 16 Undetachable conductor bolt With a undetachable conductor bolt there is no clamping piece but rather a disk as the corrosion protection between the copper bolt and the aluminum armature Cover for the bolt sealing underneath Pulling through the bolt Draw lead bolts detachable conductor bolts have a threaded bore with a hexagon screw 1 on the front for pulling through the bolt using a pulling w...

Page 17: ...ily mean value 95 C maximum value 105 C Operation height 1000 m above sea level Rain level and humidity In accordance with IEC 60060 I Pollution class In accordance with the specific creepage distance as per C57 19 100 heavy or extra heavy Immersion medium Appropriate transformer oil Oil level below bushing flange 15 mm Oil pressure Max 200 kPa gage Possibility to evacuate transformer tank No limi...

Page 18: ... equivalent material Carried in bearing shells Sealed in film with addition of dry filling 4 2 Mechanical stress Test bending load Standard in accordance with IEEE C57 19 00 and IEEE C57 19 01 Operating load 50 of test bending load Range STARIS Sia 18 53 ...

Page 19: ...sure that the bushing is not exposed to mechanical stresses particularly to porcelain or silicone insulators 5 1 Preparing the bushing Open the wooden crate Check the film on the bushing for damage NOTICE Material damage caused by knives The bushing can suffer damage when unpacking with a knife Always unpack the bushing using a safety knife with a concealed blade Open the wooden film If present re...

Page 20: ...cification Packing note if present Check whether the bushing was delivered in proper packaging In a wooden crate Carried in bearing shells Sealed in film with addition of dry filling For larger bushings Flange supported with wooden cross beams If a data logger is included in the scope of supply then provide the HSP data of the data logger Range STARIS Sia 20 53 ...

Page 21: ...Never put the bushing down on the floor Sling the bushing with one of the possible slinging variants Lifting versions Short explanation Two lifting devices e g cranes The recommended variant One lifting device is fixed to the flange on the bushing The other lifting device is fixed to the head on the bushing One lifting device e g crane If only one lifting device is available The lifting device is ...

Page 22: ...cast into the flange but they may be provided as ring screws for threaded bores ring screws included in scope of supply With ring screws as the sling points on the flange Remove the plastic covers from the threaded bores on the ring screws Screw the ring screws into the threaded bores Attach the lifting accessories of the lifting devices to the sling points on the flange and the head Range STARIS ...

Page 23: ...lifting accessories from the crane shackle to the bushing head Hold the bushing at the flange with your hand 5 1 3 Putting the bushing down NOTICE Material damage by putting the bushing down improperly If a bushing with silicone insulator is put down on the insulator the sheds may suffer damage Always put the bushing with silicone insulator down only on the head and on the flange NOTICE Material d...

Page 24: ...raw lead bolt detachable conductor bolt Fig 7 Detachable parts of the bushing head Item Part Item Part 1 Draw lead bolt detachable conductor bolt 4 Clamping piece 2 Clamping screw 5 O ring 3 Fixing screws Range STARIS Sia 24 53 ...

Page 25: ...ady removed in the crate lying next to the bushing If the bushing has an installed draw lead bolt detachable conductor bolt the draw lead bolt detachable conductor bolt can be removed Fig 8 Removing the draw lead bolt detachable conductor bolt 1 Item Part Item Part 1 Clamping screw 2 Locking screw Release the locking screw 2 and the clamping screw 1 Range STARIS Sia 25 53 ...

Page 26: ...achable conductor bolt Drive the draw lead bolt detachable conductor bolt 1 into the bushing using light blows with a rubber hammer The friction in the seal is overcome by the blows Push out the draw lead bolt detachable conductor bolt out of the bushing towards the bushing flange Range STARIS Sia 26 53 ...

Page 27: ... with agile inner disk Item Part Item Part 1 Opening to push through the electrode 4 Opening for insertion with inclination 2 Fastening slit 5 Outer disc 3 Brass pins 6 Inner disc Three brass pins 3 are let into the electrode In order to install the electrode it is guided into the relevant openings 4 in the outer disc 5 together with its three pins until the pins are in contact with the inner disc...

Page 28: ...he pins engage in the fastening slits To simplify mounting of the current connections slide the electrode over the two discs on the electrode holder through the relevant apertures before putting in place Range STARIS Sia 28 53 ...

Page 29: ...e Turn the electrode until it can be mounted Guide the electrode into the electrode holder Engage the electrode with a sharp rotation to the right 5 1 7 Cleaning the bushing Clean the bottom end of the bushing with ethyl acetate 5 2 Mounting the bushing on the transformer Observe the transformer manual for mounting the bushing on the transformer including sealing the bushing and tightening the fix...

Page 30: ...option 1 NOTICE Material damage from a uninsulated draw lead An uninsulated draw lead can create stray currents in a draw lead bolt Stray currents can generate gases when discharging and can destroy the bushing An insulation such as cloth binding prevents stray currents between the transformer connection and the central tube With a draw lead bolt Insulate an uninsulated draw lead The detachable co...

Page 31: ... too big If the pulling elements pulling wire or pulling rod are too big the O rings may suffer damage when the draw lead bolt is pulled through Ensure that the pulling elements including their fixings on the draw lead bolt have a diameter less than 30 mm Whilst lowering pull the draw lead bolt 1 up through the central tube with a pulling wire or a pulling rod until the draw lead bolt protrudes fr...

Page 32: ...lifting equipment Screw a pulling rod into the drilled hole on the face side of the detachable conductor bolt Lower the bushing slowly onto the transformer Whilst lowering the detachable conductor bolt slide the detachable conductor bolt into the bushing with the pulling rod Mount the head armature of the bushing Chap 5 2 6 on page 32 Range STARIS Sia 32 53 ...

Page 33: ...onical If the end of the cone is flush with the clamping fitting with its large diameter then the first wave form groove 2 is in the same position as the locking screw As standard tighten the locking screw in the first wave form groove 2 The second wave form groove 1 is located at a distance of 8 mm from the first wave form groove If the conductor cable needs to be tighter for tolerance reasons th...

Page 34: ...securely clamped on the bolt Remove the pulling elements from the bolt Close off the end threaded bores in the bolt again with a screw and seal 5 2 7 Connecting undetachable conductor bolt to the transformer connection option 2 Prerequisite The bushing has an electrode Remove the electrode before connecting the undetachable conductor bolt to the transformer connection 5 2 7 1 Removing the electrod...

Page 35: ...lace Fig 15 Pushing the electrode through Item Part Item Part 1 Pins 2 Cut outs Turn the electrode so that its pins can be directed through the through openings of both discs Slide the electrode over the two discs Twist the electrode slightly and place it on the inner disc The electrode is now no longer in the way when mounting the current connections Range STARIS Sia 35 53 ...

Page 36: ...otation to the right 5 2 8 Screwing the bushing to the transformer To install the bushing including tightening the fixing screws and sealing the bushing sealant not in scope of supply of HSP Observe the transformer manual Observe the operating standard torques Chap 11 1 on page 52 With flat gasket seals ensure appropriate external support Screw the bushing in place 5 2 9 Grounding the bushing flan...

Page 37: ...t the concluding work of the installation 5 3 1 Releasing the ring screws Prerequisite The lifting eyes are ring screws Unscrew the ring screws from the threaded bores Mount the plastic covers on the threaded bores Range STARIS Sia 37 53 ...

Page 38: ...essary If necessary evacuate the transformer Fill the transformer with oil 6 2 Venting the bushing NOTICE Material damage caused by air in the bushing Air in the bushing can endanger operation and can damage the bushing Vent the bushing with the help of air release screws positions see bushing specification Fig 16 Air release screws Item Part Item Part 1 Air release screw head 3 Air release screw ...

Page 39: ...tab is screwed on tightly 6 3 2 Leak test visual The leak testing of the installed bushing can only be carried out to a limited extent Transformer oil is not present at all positions on the bushing The oil is present at the flange it is adequate for vertically installed bushings but does not always reach to the head Check whether and where oil is coming out of the bushing 6 3 3 Electrical testing ...

Page 40: ... reference measurement has been carried out during the final acceptance tests Carry out a reference measurement of the bushing on site in order to be able to compare later measurements identical measuring conditions Chap 7 3 on page 43 Range STARIS Sia 40 53 ...

Page 41: ...nt result at intervals of 3 years or fewer Chap 7 3 on page 43 Check the temperature using a thermal image At the discretion of the operator Chap 7 4 on page 48 7 2 Check and clean insulator surface silicone insulator The insulator surface is water repellent hydrophobicity Discharge traces on the insulator surface change the water repellent features of the composite insulator Make a visual check o...

Page 42: ...d does not permit any statement of a guaranteed operating performance In wind free and dry weather spray a hand size area abundantly with water from a spray bottle at a distance of approx 30 cm Compare the drop pattern with the HC classification If the drop pattern corresponds to the HC classes HC 1 HC 2 or HC 3 then the water repellent feature of the composite insulator is still adequate Range ST...

Page 43: ...during the measurements Make sure that there are no persons in the vicinity of the bushing during the electrical measurements Carry out the electrical measurements only if you have experience with the measuring equipment the measuring layout and the interpretation of the measurement results NOTICE Material damage caused by improperly conducted electrical measurements The bushing may suffer damage ...

Page 44: ...procedure is used if the bushing to be measured does not have a test tab The bushings in this range have a test tab Take further details concerning the measuring procedures from the instruction manuals of the measuring equipment 7 3 3 Threshold values There are threshold values for the material RIS resin impregnated synthetic for the deviation of capacity and the power factor from the reference va...

Page 45: ...y have suffered a partial breakdown The level of capacity deviation caused by a partial breakdown depends on the number of inserts The number of inserts rises with increasing voltage level and the capacity deviation reaches the level of measuring accuracy of the capacity measurement Fig 19 ΔC ΔC0 Um Axis Meaning X Voltage Um of the bushing Y Change of capacity ΔC ΔC0 depending on the voltage Um If...

Page 46: ... operation the screwed on removable cap grounds the pin with the help of a grounding contact 1 Connect the measuring lead to the pin Carry out the measurements NOTICE Material damage from missing removable cap The test tab is not self grounding If the bushing is operated with an open test tab then the insulated bushing in the test tab will be destroyed followed by inner fault of the entire bushing...

Page 47: ...illing hole 6 O ring The penultimate grading layer of the capacitive grading is directed out using the voltage tap 2 with the help of an insulated bushing 1 The removable cap 4 has an o ring seal 6 to ensure that the inner space of the voltage tap remains free from humidity In operation the screwed on removable cap grounds the pin with the help of a grounding contact 5 Connect the measuring lead t...

Page 48: ...ug into the insulated bushing Fill the inner space with insulating oil via the oil filling hole 3 oil level approx 2 3 cm 3 less than the total volume 7 4 Check the temperature using a thermal image If the installations are regularly checked using a thermal image then observe the following when carrying this out The temperature at the outer contact point the lead clamp normally increases by up to ...

Page 49: ...iscuss the next steps with HSP in the event of smaller or larger damage to the bushing 8 1 Smaller damages Have the bushing repaired on site by HSP or request repair instructions from HSP 8 2 Huge damages In the event of huge damages e g after failure of the bushing in an inner fault the bushing cannot be repaired on site HSP can use appropriate measures to investigate the bushing in the HSP works...

Page 50: ...torage in protected dry rooms Bushing stored in original packaging plastic film with dessicant bags inside Protection from direct sunlight HSP recommended additional mechanical protection of the active section with a HSP protection tank coated steel Fig 22 Protection tanks example illustration Screw the protection tank onto the bushing Place the dry filling bag in the protection tank Screw the pro...

Page 51: ...ion Flanges made from aluminum alloys brass or stainless steel depending on the version Central tube Aluminum alloys Fixing materials test tab screw etc Stainless steel aluminum alloys and brass Polyurethane elastomer dry filling If the dry filling contains SF6 The polyurethane elastomer with SF6 must be burnt without residue at min 1200 C in accordance with CIGRE SF6 Recycling Guide Silicone bush...

Page 52: ... Nm Torque kpm M4 1 10 0 11 M5 2 20 0 22 M6 4 00 0 40 M8 10 00 1 00 M10 19 00 1 90 M12 33 00 3 30 M14 52 00 5 20 M16 80 00 8 00 M18 110 00 11 00 M20 160 00 16 00 M22 210 00 21 00 M24 255 00 25 50 M27 370 00 37 00 M30 510 00 51 00 11 2 Standard torques for air release screws Screw Torque Nm Torque kpm M6 3 40 0 34 M8 7 00 0 70 M10 13 00 1 30 M12x1 5 15 00 1 50 M16x1 5 40 00 4 00 Range STARIS Sia 52...

Page 53: ...aintenance instructions Range STARIS Sia 11 20 Brands and trademarks used in this document are the property of HSP Hochspannungsgeräte GmbH All rights reserved The information in this document contains general descriptions and technical options available which may not apply in all cases The required technical options should therefore be specified in the contract www hspkoeln de ...

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