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Summary of Contents for Velatia Ormazabal transforma.plur
- Page 1 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 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: •...
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Page 3: Table Of Contents
Contents General Instructions transforma.plur: Transformers with corrugated tank and submerged in dielectric liquid from 3150 kVA Contents 1. Description and main characteristics .......4 6. Start up ..............19 1.1. Design, manufacturing and testing ... 4 6.1. -
Page 4: Description And Main Characteristics
Description and main characteristics General Instructions transforma.plur: Transformers with corrugated tank and submerged in dielectric liquid from 3150 kVA Description and main characteristics 1.1. Design, manufacturing and testing Ormazabal's transformers have been designed and More specifically, apart from the mineral oil-immersed constructed in accordance with the mandatory standards. -
Page 5: Lifting, Moving And Handling
General Instructions Lifting, moving and handling transforma.plur: Transformers with corrugated tank and submerged in dielectric liquid from 3150 kVA Lifting, moving and handling CAUTION! The lifting elements must be selected based on the To lift, move or fasten the transformer to the transport transformer's total weight, as shown on the nameplate. - Page 6 Lifting, moving and handling General Instructions transforma.plur: Transformers with corrugated tank and submerged in dielectric liquid from 3150 kVA Figure 2.3. Detail of lifting a transformer by crane Figure 2.2. Detail of crane hook preparation in the eyebolts The following indications must be taken into account when completely hoisting the transformer: Transformers with eyebolts on the sides of the tank •...
- Page 7 General Instructions Lifting, moving and handling transforma.plur: Transformers with corrugated tank and submerged in dielectric liquid from 3150 kVA - The transformer has four lifting elements positioned at the top of the sides for transformers with eyebolts on the tank (Figure 2.5). Figure 2.5.
- Page 8 Lifting, moving and handling General Instructions transforma.plur: Transformers with corrugated tank and submerged in dielectric liquid from 3150 kVA - DO NOT use the transformer cover lifting elements in transformers 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).
- Page 9 General Instructions Lifting, moving and handling transforma.plur: Transformers with corrugated tank and submerged in dielectric liquid from 3150 kVA • Transformers with eyebolts on the the tank cover Whenever the lifting eyebolts are placed on the cover because the weight of the transformer so allows, and they are identified in yellow (Figure 2.9).
- Page 10 Lifting, moving and handling General Instructions transforma.plur: Transformers with corrugated tank and submerged in dielectric liquid from 3150 kVA The slings or lifting chains in the eyebolts must also form an angle equal to or above 80° with the horizontal of the transformer, and must allow fully vertical lifting at all times.
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Page 11: Transport
General Instructions Transport transforma.plur: Transformers with corrugated tank and submerged in dielectric liquid from 3150 kVA Transport Despite the robust design and construction of the can be severely damaged in these operations if shaking, transformers manufactured by Ormazabal, their integrity vibrations, impacts or knocks above normal for goods of depends critically on the safety and protection measures these dimensions and weight occur. - Page 12 Transport General Instructions transforma.plur: Transformers with corrugated tank and submerged in dielectric liquid from 3150 kVA • Bottom fastening elements: located at the base of the transformer and used for the bracing or lashing elements for transport. (Figure 3.2) Figure 3.2. Bottom fastening elements •...
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Page 13: Transport Agents
General Instructions Transport transforma.plur: Transformers with corrugated tank and submerged in dielectric liquid from 3150 kVA 3.2. Transport agents All agents, companies and personnel involved in damage from violent events during transport, as well as transformer transport and handling tasks must demonstrate having accreditations and aptitude certificates for driving due preparation, training, procedures and experience the means of transport used. -
Page 14: Storage
Storage General Instructions transforma.plur: Transformers with corrugated tank and submerged in dielectric liquid from 3150 kVA 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. -
Page 15: Installation
General Instructions Installation transforma.plur: Transformers with corrugated tank and submerged in dielectric liquid from 3150 kVA Installation Ormazabalis not responsible for transformer insta- llation, which must be carried out in accordance with applicable legislation. 5.1. Receiving the transformer The transformer is supplied ready for connection to the network. -
Page 16: Transformer Site
Installation General Instructions transforma.plur: Transformers with corrugated tank and submerged in dielectric liquid from 3150 kVA 5.2. Transformer site When the transformer has a dielectric liquid of plant origin: Poor ventilation of the transformer may cause it to overheat. Natural esters have higher freezing points than those of mineral oil. - Page 17 General Instructions Installation transforma.plur: Transformers with corrugated tank and submerged in dielectric liquid from 3150 kVA 7. Earth the transformer tank using round connecting 8. Connect the transformer to the medium voltage points for a standard cross-section earthing cable, as circuit, or primary circuit.
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Page 18: Special Transformers With Electrostatic Screen Between Primary And Secondary
Installation General Instructions transforma.plur: Transformers with corrugated tank and submerged in dielectric liquid from 3150 kVA 5.3.2. Special transformers with electrostatic screen between primary and secondary Transformers which are to be connected to renewable generation plants (photovoltaic or wind) or to power electronics equipment must have the following additional considerations: •... -
Page 19: Start Up
General Instructions Start up transforma.plur: Transformers with corrugated tank and submerged in dielectric liquid from 3150 kVA Start up 6.1. Transformer check before commissioning Once the transformer is connected to the power networks, Failure to follow these safety precautions may result in and before connecting the electrical power source, the death by electric shock or irreversible damage to the following checks should be performed:... - Page 20 Start up General Instructions transforma.plur: Transformers with corrugated tank and submerged in dielectric liquid from 3150 kVA 5. Keep the transformer supplied with no-load for at least Risk of death caused by electric shock and of 12 hours, checking that there are no anomalies in any of irreversible damage to the transformer or to the the transformer instruments.
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Page 21: Maintenance
General Instructions Maintenance transforma.plur: Transformers with corrugated tank and submerged in dielectric liquid from 3150 kVA Maintenance 7.1. Access for maintenance operations Before performing any maintenance operation on the 4. Using an insulating stick, earth the transformer bushings transformer, follow the measures required by applicable and ensure that any static electricity is discharged. -
Page 22: Noise
Maintenance General Instructions transforma.plur: Transformers with corrugated tank and submerged in dielectric liquid from 3150 kVA 7.2.3. Noise Ormazabal and inform of their nature in order to determine Whenever noises other than those typical of the transformer's normal operation are detected, contact their origin. - Page 23 General Instructions Maintenance transforma.plur: Transformers with corrugated tank and submerged in dielectric liquid from 3150 kVA Instructions for touching-up paint The procedure for repairing damaged paint is as follows: 1. Sanding the affected area Remove the rust using sandpaper or a suitable scraper, until the metal is shiny.
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Page 24: Regularity Of Maintenance
Maintenance General Instructions transforma.plur: Transformers with corrugated tank and submerged in dielectric liquid from 3150 kVA 7.3. Regularity of maintenance It is recommended to perform at least one annual inspection 3. Clean state: check that the transformer is clean and of the following aspects: well conserved. -
Page 25: Repairs
General Instructions Maintenance transforma.plur: Transformers with corrugated tank and submerged in dielectric liquid from 3150 kVA 7.4. Repairs If the transformer presents any anomaly in its operation, the user must notify Ormazabal, who must provide the appropriate instructions. 1. If, after the transformer inspection, repairs or modifications are required, these operations must be carried out by the Ormazabal. -
Page 26: Additional Information
Additional information General Instructions transforma.plur: Transformers with corrugated tank and submerged in dielectric liquid from 3150 kVA Additional information 8.1. Reliability As shown by the tests, the transformer leaves the factory the maintenance instructions indicated in this general free of defects and is ready to provide service for its entire instructions manual. -
Page 27: Final Annex
General Instructions Final annex transforma.plur: Transformers with corrugated tank and submerged in dielectric liquid from 3150 kVA Final annex 9.1. Tightening torques 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... - Page 28 Ormazabal Subject to change Cotradis without prior notice. Transformadores For further information, LOECHES contact Ormazabal. Spain www.ormazabal.com...
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