background image

In view of the constant evolution in standards and design, the characteristics of the elements contained in this manual are subject 

to change without prior notice. These characteristics, as well as the availability of components, are subject to confirmation by 

Ormazabal

.

CAUTION! 

When medium-voltage equipment is operating, certain components are live, other parts may be in movement and some may 

reach high temperatures. Therefore, the use of this equipment poses electrical, mechanical and thermal risks.
In order to ensure an acceptable level of protection for people and property, and in compliance with applicable environmental 

recommendations, 

Ormazabal

 designs and manufactures its products according to the principle of integrated safety, based on 

the following criteria:

 • Elimination of hazards wherever possible.
 • Where elimination of hazards is neither technically nor economically feasible, appropriate protection functions are 

incorporated in the equipment.

 • Communication about remaining risks to facilitate the design of operating procedures which prevent such risks, 

training for the personnel in charge of the equipment, and the use of suitable personal protective equipment.

 • Use of recyclable materials and establishment of procedures for the disposal of equipment and components so 

that once the end of their service lives is reached, they are duly processed in accordance, as far as possible, with the 

environmental restrictions established by the competent authorities.

Consequently, the equipment to which the present manual refers complies with the requirements of section 11.2 of Standard 

IEC 62271-1. It must therefore only be operated by appropriately qualified and supervised personnel, in accordance with the 

requirements of standard EN 50110-1 on the safety of electrical installations and standard EN 50110-2 on activities in or near 

electrical 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 which are in general beyond the control and responsibility of the manufacturer. More specifically:

 • The equipment must be handled and transported appropriately from the factory to the place of installation.
 • All intermediate storage should occur in conditions which do not alter or damage the characteristics of the equipment 

or its essential components.

 • Service conditions must be compatible with the equipment rating.
 • The equipment must be operated strictly in accordance with the instructions given in the manual, and the applicable 

operating and safety principles must be clearly understood.

 • Maintenance should be performed properly, taking into account the actual service and environmental conditions in 

the place of installation.

The manufacturer declines all liability for any significant indirect damages resulting from violation of the guarantee, under any 

jurisdiction, including loss of income, stoppages and costs resulting from repair or replacement of parts.

Warranty

The manufacturer guarantees this product against any defect in materials and operation during the contractual period. In the 

event that defects are detected, the manufacturer may opt either to repair or replace the equipment. Improper handling of this 

equipment and its repair by the user shall constitute a violation of the guarantee.

Registered Trademarks and Copyrights

All registered trademarks cited in this document are the property of their respective owners. The intellectual property of this manual 

belongs to 

Ormazabal

.

[1] 

For example, in Spain the “Regulation on technical conditions and guarantees for safety in high-voltage electrical installations” – Royal Decree 

337/2014 is obligatory.

Summary of Contents for Ormazabal transforma.plur

Page 1: ...LIB transforma plur Transformers with corrugated tank and submerged in dielectric liquid from 3150 kVA General Instructions IG 287 EN version 03 24 07 2020...

Page 2: ...ectrical 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 si...

Page 3: ...ability 13 4 Storage 14 5 Installation 15 5 1 Receiving the transformer 15 5 2 Transformer site 16 5 3 Transformer electrical connections 16 5 3 1 Standard procedure 16 5 3 2 Special transformers with...

Page 4: ...ation point which allows it to maintain high dielectric rigidity values with a high water content High fire resistance natural dielectric ester is classified as a K class liquid fire point 300 C accor...

Page 5: ...azabal is not responsible for an unsuitable choice or use of such means 2 1 Lifting and moving by crane In order to lift and move the transformer by crane it must be taken into account that the liftin...

Page 6: ...uid from 3150 kVA Figure 2 2 Detail of crane hook preparation in the eyebolts Figure 2 3 Detail of lifting a transformer by crane The following indications must be taken into account when completely h...

Page 7: ...ements positioned at the top of the sides for transformers with eyebolts on the tank Figure 2 5 Figure 2 5 Position of the lifting elements ALWAYS lift the transformer using the four lifting elements...

Page 8: ...rs with eyebolts on the tank These elements are invalidated to prevent any use other than to remove the transformer from the tank if this is fitted with lifting elements see Figure 2 7 Figure 2 7 Deta...

Page 9: ...e identified in yellow Figure 2 9 Figure 2 9 Eyebolts on the the tank cover In the case of transformers of lower weight two or four optional eyebolts are available on the cover In the case of transfor...

Page 10: ...to or above 80 with the horizontal of the transformer and must allow fully vertical lifting at all times The slings must not rub or damage the bushings or other accessories ALWAYS lift the transformer...

Page 11: ...her elements suitable for the mass of the transformer as shown on its nameplate The protection tools and equipment provided or recommended by Ormazabal according to the agreement with the customer suc...

Page 12: ...ments When securing the transformer make sure that the lashing or bracing chains do not interfere with any of the transformer s accessories or cooling elements The fastening straps are attached to the...

Page 13: ...enttrafficandtransportregulations in each transit country must be abided by If the transformer s transport will include sections of roads or routes off paved roads with normal conditions the customer...

Page 14: ...kVA 4 Storage If commissioning is not immediate transformers must be stored following the recommendations below Store the transformer horizontally in a clean dry place on firm levelled ground If the t...

Page 15: ...r Check the general state of the transformer and ensure the absence of any knocks in particular on the cooling equipment and the insulators or terminals If the transformer has paint defects it must be...

Page 16: ...l weight which is shown on its nameplate 5 3 Transformer electrical connections 5 3 1 Standard procedure Risk of death by electric shock and of irreversible damage to the transformer or to the electri...

Page 17: ...ions which do not place any strain on the transformer bushings sufficiently sized to prevent excessive overheating and at the same time allow for the dilatations caused by heat without damaging the tr...

Page 18: ...ostatic screen must have its connector bushing identified as P E or E S and must be connected rigidly to the installation s earth preferably the protection earth if there are two earth installations R...

Page 19: ...rmer has been powered it will recover its usual liquid stage 4 Regulate the transformer s voltage using the corresponding tap changer taking into account the following safety precautions Failure to fo...

Page 20: ...ower is achieved while ensuring that the transformer temperature does not go over 105 C In the case of renewable generation transformers connect to the generation source in low generation conditions a...

Page 21: ...d ensure that any static electricity is discharged 5 Delimit and mark the work area properly 6 Check that the transformer does not leak dielectric liquid In case of dielectric liquid leakages contact...

Page 22: ...vements of the transformer Check that the tank valve screws have not become loose due to vibrations If they have tighten securely to prevent any re occurrence 7 2 5 Oil leaks Although it is not normal...

Page 23: ...is rich in anti corrosive pigments of aluminium zinc or similar Ensure that this paint covers the whole area Shake the contain vigorously before applying the spray After applying the primer coat let...

Page 24: ...ections and clean any dirt 3 Terminals Once every 2 years Check state and clean 4 Tap changer Once a year Move the tap changer through all positions 5 Accessories with alarm and trip contacts Once eve...

Page 25: ...1 If after the transformer inspection repairs or modifications are required these operations must be carried out by the Ormazabal 2 If a company other than Ormazabalperforms the repair or modification...

Page 26: ...essary precautions are taken to protect personnel who normally or circumstantially work around it and that those persons not required for its operation are kept at a safe distance away from the transf...

Page 27: ...350 Fastening the palms to the pin stainless steel bolts 25 35 40 60 Bolts to the surface of the palms 25 35 40 70 100 150 Connections at low voltage busbars steel bolt and nut 45 60 65 85 95 130 Medi...

Page 28: ...Subject to change without prior notice For further information contact Ormazabal www ormazabal com Ormazabal Cotradis Transformadores LOECHES Spain...

Reviews: