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Summary of Contents for Ormazabal velatia transforma.dis
- Page 1 transforma.dis Distribution transformers immersed in dielectric liquid up to 3150 kVA General instructions IG-168-EN, version 05, 17/04/2020 IG168-009...
- Page 2 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: •...
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Page 3: Table Of Contents
General instructions Table of Contents transforma.dis: Distribution transformers immersed in dielectric liquid up to 3150 kVA Table of Contents 1. Description and main characteristics .......4 6. Commissioning ............25 1.1. Design, manufacturing and testing ... 4 6.1. -
Page 4: Description And Main Characteristics
Distribution transformers immersed in dielectric liquid up to 3150 kVA Description and main characteristics 1.1. Design, manufacturing and testing Ormazabal's transformers have been designed and constructed in accordance with mandatory standards, and meet all testing requirements in current medium-voltage electrotechnical regulations , as well as particular customer specifications. -
Page 5: Individual Or Routine Tests
General instructions Description and main characteristics transforma.dis: Distribution transformers immersed in dielectric liquid up to 3150 kVA 1.1.1. Individual or routine tests The transformers are subjected to routine tests, which guarantee compliance with the following standards: UNE-EN 60076-1, IEC-60076-1 Winding resistance measurement UNE-EN 60076-1, IEC 60076-1 Transformation ratio measurement and check up of vector group UNE-EN 60076-1, IEC 60076-1... -
Page 6: Lifting, Moving And Handling
Ormazabal shall not be liable for any improper choice or use. 2.1. Lifting and moving with a forklift truck In this case, the transformer must only be lifted and moved... -
Page 7: Lifting And Moving By Crane
General instructions Lifting, moving and handling transforma.dis: Distribution transformers immersed in dielectric liquid up to 3150 kVA 2.2. Lifting and moving by crane When lifting and moving the transformer with a crane, it Risk of death by crushing and damage to the must be remembered that the lifting elements allow the transformer or to the installation. - Page 8 Lifting, moving and handling General instructions transforma.dis: Distribution transformers immersed in dielectric liquid up to 3150 kVA The following indications must be taken into account when lifting the transformer: Transformers with eye bolts in the sides of the tank • - The lifting elements are used via the central hole (Figure 2.4).
- Page 9 General instructions Lifting, moving and handling transforma.dis: Distribution transformers immersed in dielectric liquid up to 3150 kVA - NEVER lift the transformer using the outside holes (Figure 2.6). Figure 2.6. Position not permitted for lifting - DO NOT use the transformer cover lifting elements in transformers with eye bolts in the tank.
- Page 10 Lifting, moving and handling General instructions transforma.dis: Distribution transformers immersed in dielectric liquid up to 3150 kVA - NEVER lift the transformer using the connecting rod of the cooling elements (Figure 2.8) Figure 2.8. Position not permitted for lifting • Transformers with eye bolts in the tank cover only Whenever the lifting eye bolts are placed on the cover, because the weight of the transformer so allows, and...
- Page 11 General instructions Lifting, moving and handling transforma.dis: Distribution transformers immersed in dielectric liquid up to 3150 kVA For lighter transformers, two or four eye bolts are optionally fitted in the cover. In the case of transformers with four eye bolts, four lifting hooks must be used at the same time.
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Page 12: Moving On Wheels
Lifting, moving and handling General instructions transforma.dis: Distribution transformers immersed in dielectric liquid up to 3150 kVA The slings or lifting chains in the eye bolts must also form an angle equal to or above 60º with the horizontal of the transformer, and must allow fully vertical lifting at all times. -
Page 13: Transport
The protection tools and equipment provided or recommended by Ormazabal (according to the agreement with the customer), such as anti-vibration brackets and elements for pulling (bracing) or securing the load, must be used for transport. - Page 14 Transport General instructions transforma.dis: Distribution transformers immersed in dielectric liquid up to 3150 kVA Bottom fastening elements: are located at the base • of the transformer, and are used for bracing or lashing during transport (Figure 3.2). Figure 3.2. Bottom fastening elements •...
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Page 15: Transport Agents
The transformers are prepared for transport on flat, paved indicate this circumstance in the order sent to roads without significant potholes. Ormazabal. Following this communication, the best solution for transport will be decided between the customer and Ormazabal. IG-168-EN version 05; 17/04/2020... -
Page 16: Checking Impact Detectors
3.4. Checking impact detectors Ormazabal reserves the right to fit impact detectors (or ask If transport is not managed by Ormazabal, or is not carried for them to be fitted) in its transformers in order to provide out under its responsibility, and accelerations in excess... -
Page 17: Storage
General instructions Storage transforma.dis: Distribution transformers immersed in dielectric liquid up to 3150 kVA Storage If commissioning is not immediate, transformers must be Due to the particular characteristics of natural esters stored following the recommendations below: at low temperatures, it is best to avoid storing these transformers at temperatures below -5°C. -
Page 18: Installation
The transformer seals must be unbroken and untouched. a report of anomalies or defects found, it is assumed that the transformer arrived in a perfect condition and Ormazabal will not be responsible for any future anomalies or their consequences. IG-168-EN version 05; 17/04/2020... -
Page 19: Transformer Site
General instructions Installation transforma.dis: Distribution transformers immersed in dielectric liquid up to 3150 kVA 5.2. Transformer site The transformer site for both indoor and outdoor If the transformer is installed indoors, prepare a horizontal installations must allow adequate cooling. base that supports the transformer. Take into account the total weight of the transformer, which is shown on its name plate. - Page 20 9. Connect the transformer to the secondary circuit using flexible connections which do not place any strain on the transformer bushings, sufficiently sized to prevent Contact Ormazabal in the event of dielectric liquid excessive overheating and, at the same time, allow leaks.
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Page 21: Special Transformers With Electrostatic Screen Between Primary And Secondary
General instructions Installation transforma.dis: Distribution transformers immersed in dielectric liquid up to 3150 kVA 5.3.2. Special transformers with electrostatic screen between primary and secondary Transformers which are to be connected to renewable Risk of death by electric shock and of irreversible generation plants (photovoltaic or wind) or to power damage to the transformer or to the electrical electronics equipment must have the following additional... - Page 22 Installation General instructions transforma.dis: Distribution transformers immersed in dielectric liquid up to 3150 kVA 1. Use as many cables per phase as possible. The number of cables per LV bushing should be the same. Figure 5.3. Example of a low-voltage connection using one cable Figure 5.5.
- Page 23 General instructions Installation transforma.dis: Distribution transformers immersed in dielectric liquid up to 3150 kVA 2. Do not make excessive upward turns with the cables. Figure 5.6. Cables with excessive upward turns 3. Run the cables attached to the transformer and to the floor.
- Page 24 Installation General instructions transforma.dis: Distribution transformers immersed in dielectric liquid up to 3150 kVA 4. Braid the phase and neutral cables on the way to the LV board, as shown in the figure. Figure 5.9. Unbraided phase and neutral cables on their way to the low- Figure 5.10.
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Page 25: Commissioning
Contact Ormazabal in matches the transformer's rated voltage. Contact the case of any anomaly. Ormazabal in the case of any anomaly. • If an adjustment is required after commissioning the iii. If an adjustment is required after commissioning... -
Page 26: Natural Ester Transformers
-10 °C while the outside temperature is higher, due to the thermal In these cases, Ormazabal recommends the following inertia of the ester. In order to guarantee the integrity of the... -
Page 27: Maintenance
• Contact Ormazabal in the event of dielectric liquid leaks. 1. Disconnect all the electrical power sources for the circuits until the transformer is turned off, interlocking or blocking the necessary breaking devices to prevent any power supply. -
Page 28: Inspecting Oil Volume
7.2.3. Noise If strange noises are heard to come from the transformer, can determine the cause. contact Ormazabal and report the circumstances, so we 7.2.4. Tightening bolts and threaded pieces Whenever it is detected that the tank's earthing terminals The bolts or rods that keep the transformer's wheel chocks... - Page 29 Spray on the dry primer, using the same colour as the paint finish, covering the area. Excess paint is removed with a damp cloth. Please contact Ormazabal to determine the exact colour of the spray paint. Figure 7.3. Spray primer...
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Page 30: Regularity Of Maintenance
Maintenance General instructions transforma.dis: Distribution transformers immersed in dielectric liquid up to 3150 kVA 7.3. Regularity of maintenance Visually inspecting the following aspects of the transformer If a maximum temperature trailing pointer is fitted, is recommended: it is very important to check that this maximum temperature is within the transformer's normal Sealtight integrity: check that the transformer does •... -
Page 31: Repairs
Distribution transformers immersed in dielectric liquid up to 3150 kVA 7.4. Repairs If a company other than Ormazabal performs the repair If the transformer presents any anomaly in its operation, the user must notify Ormazabal, who will provide appropriate or modification, it must affix a plate to the transformer instructions. -
Page 32: Additional Information
Additional information General instructions transforma.dis: Distribution transformers immersed in dielectric liquid up to 3150 kVA Additional information 8.1. Reliability As shown by the tests, the transformer leaves the factory The maintenance instructions set out in this document free of defects and is ready to provide service for its entire must be observed. -
Page 33: Final Annex
General instructions Final annex transforma.dis: Distribution transformers immersed in dielectric liquid up to 3150 kVA Final annex The torques recommended for the connections are as follows. Recommended tightening torques [Nm] Metric size Wrench size • Connection between nuts. 15-20 70-100 250-350 Low-voltage •... - Page 34 Notes General instructions transforma.dis: Distribution transformers immersed in dielectric liquid up to 3150 kVA Notes IG-168-EN version 05; 17/04/2020...
- Page 36 Ormazabal Subject to change Cotradis without prior notice. Transformadores For further information, LOECHES contact Ormazabal. Spain www.ormazabal.com...
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