Ormazabal transforma.hvd General Instructions Manual Download Page 24

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Ormazabal

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Transformadores

LOECHES

Spain

Summary of Contents for transforma.hvd

Page 1: ...LIB transforma hvd Special distribution transformers series 52 and 72 5 kV General instructions IG 315 EN version 01 27 04 2021 ...

Page 2: ...lectrical installations Personnel must be fully familiar with the instructions and warnings contained in this manual and in other recommendations of a more general nature which are applicable to the situation according to current legislation 1 The above must be carefully observed as the correct and safe operation of this equipment depends not only on its design but also on general circumstances wh...

Page 3: ...ansport 8 2 6 Transport agents 10 2 7 Selecting the route for road transport 10 2 8 Checking impact detectors 10 2 9 Liability 10 3 Storage 11 4 Installation 12 4 1 Receipt of the special distribution transformer 12 4 2 Location of the special distribution transformer 13 4 3 Electrical connections of the special distribution transformer 13 4 3 1 Standard procedure 13 5 Start up 15 5 1 Special dist...

Page 4: ...nsformers have been designed and constructed in accordance with the mandatory standards They meet the testing requirements of the MediumVoltage MV electro technical regulations in force at the time of their manufacture as well as particular customer specifications 1 Expansion tank 2 Oil level 3 MV neutral terminal 4 MV phase terminals 5 Safety relief valve 6 Connection cabinet 7 Silica gel desicca...

Page 5: ...6 1 Losses and no load current measurement IEC 60076 1 Zero sequence impedance measurement IEC 60076 1 Power frequency voltage test IEC 60076 3 Induced voltage test IEC 60076 3 Transformation ratio measurement and check up of vector group IEC 60076 1 Measurement of short circuit impedance and load losses IEC 60076 1 Applied voltage test IEC 60076 3 For other standards please ask Ormazabal 1 1 2 Te...

Page 6: ... be transported and handled using a forklift truck crane or rollers Risk of machinery breakage The hoisting elements must be selected based on the special distribution transformer s total weight as shown on the nameplate 2 1 Transport on a forklift truck To transport the special distribution transformer on a forklift truck it must be properly fitted and fastened to a special pallet adequate to han...

Page 7: ...e installation Use the eye bolts in the special distribution transformer cover to lift it with a crane maintaining a horizontal position at all times If the weight of the special distribution transformer requires the lifting eye bolts to be located in the tank they will be duly identified with a different colour Avoid causing damage to the elements on the special distribution transformer cover Use...

Page 8: ... dimensions and weight occur 2 5 Preparing the load for transport The special distribution transformer must be fixed by means of slings chains and other elements suitable for the weight of the special distribution transformer as shown on its nameplate The protection tools and equipment provided or recommended by Ormazabal according to the agreement with the purchaser such as anti vibration mounts ...

Page 9: ...re with any of the special distribution transformer s accessories or cooling elements The fastening straps must be attached to the container s fastening elements on both sides of the special distribution transformer producing a symmetrical tension which is offset on both sides The connecting rods of the cooling elements must not be used as lashing points for transport or for any other similar func...

Page 10: ...nt and the cant of the road should take precedence over shortest distance Journeys on routes undergoing or pending roadworks should be avoided and as far as possible priority should be given to the highest category of motorways with minimum slope maximum linearity and best road surface condition 2 8 Checking impact detectors Ormazabal reserves the right to fit impact recorders or detectors in its ...

Page 11: ... special distribution transformersmustbestoredfollowingtherecommendations below Store the special distribution transformer in a place that is dry and clean If the special distribution transformer is equipped with plug in terminals make sure the conical protector provided with the special distribution transformer for keeping the connection terminals clean and intact is in place ...

Page 12: ...on transformer has all of its accessories rollers thermometer etc ensuring they are not damaged Some accessories such as the silica gel desiccant the wheels and or the thermometer can be removed for transport Other accessories such as the Buchholz relay or the overpressure relay with relief valve can be blocked to avoid their being activated during transport In both cases it is necessary to instal...

Page 13: ...only be performed by qualified personnel while always observing the proper electrical safety measures The steps to follow to complete the electrical connection of the special distribution transformer are as follows 1 Check that the electrical power supply to the special distribution transformer matches the service values shown on the special distribution transformer s nameplate Risk of causing irr...

Page 14: ...to the Medium Voltage circuit MV Use flexible connections which do not place any strain on the special distribution transformer bushings sufficiently sized to prevent excessive overheating and at the same time allow for the expansion caused by heat without damaging the transformer Risk of causing irreversible damage to the machine The tightening torques must guarantee the proper electrical contact...

Page 15: ...cial distribution transformer with no load and check its correct connection and regulation by measuring the values at the low voltage LV side Risk of death by electric shock and of irreversible damage to the machine or to the electrical installation The tap changers should always be operated without electrical power ensuring the handle is well locked and in its working position Check that the elec...

Page 16: ...w the measures required by applicable legislation including 1 Disconnect all the electrical power sources for the Medium Voltage MV circuit and the Low Voltage LV circuit if applicable until the special distribution transformer is turned off Interlock or block the necessary switching devices to prevent the power supply 2 Check that electrical voltage is not present 3 Earth and short circuit all th...

Page 17: ...cessories with alarm and trip contacts Once every 2 years Check the conditions of use the contacts and measure the electrical insulation of the circuit 2 Terminal box Once every 2 years Check the connections and clean the dirt 3 Silica gel Once a year Check the condition of the silica gel If necessary replace it 4 Cable connectors Once every 2 years Check state and clean 5 Thermometer Once a year ...

Page 18: ... If after the special distribution transformer inspection repairs or modifications are required these operations must be carried out by Ormazabal If a company other than Ormazabal performs the repair or modification it must place a plate on the machine indicating the modification or repair performed and the new characteristics of the repaired or modified machine Ormazabal will not be responsible f...

Page 19: ...ion the necessary precautions are taken to protect personnel who normally or circumstantially work around it and that any persons not required for its operation are kept at a safe distance away from the transformer 7 2 Company registration certificate The Company registration certificate Nº ER 0227 1996 granted by AENOR EQ NET and dated 23 5 1996 guarantees that our Quality Assurance System establ...

Page 20: ...95 Bolts at palm surface 25 35 40 70 100 150 Connections in low voltage busbars steel bolt and nut 45 60 65 85 95 130 Medium voltage MV Fastening terminals to the medium voltage pin brass pin and nuts 10 15 15 20 25 30 65 75 The medium voltage terminals include three nuts but only the two top can be handled The purpose of the lower nut is to tighten the insulator gasket if it is loosened it could ...

Page 21: ...General instructions transforma hvd Special distribution transformers series 52 and 72 5 kV Notes Notes IG 315 EN version 01 27 04 2021 21 ...

Page 22: ...Notes General instructions transforma hvd Special distribution transformers series 52 and 72 5 kV Notes IG 315 EN version 01 27 04 2021 22 ...

Page 23: ......

Page 24: ...Subject to change without prior notice For further information contact Ormazabal www ormazabal com Ormazabal Cotradis Transformadores LOECHES Spain ...

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