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Summary of Contents for Ormazabal velatia transforma.earth
- Page 1 transforma.earth Three-Phase earthing transformers up to 36 kV General instructions IG-286-EN, version 01; 11/07/2019...
- 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 Index transforma.earth INDEX Description and general features... 4 Design, manufacture, and testing ....4 1.1.1 Standard or routine testing . -
Page 4: Description And General Features
DESCRIPTION AND GENERAL FEATURES 1.1 Design, manufacture, and testing The earthing transformers manufactured by Ormazabal have been designed and manufactured to meet mandatory standards and testing regulations according to Medium Voltage (MV) Electrotechnical Regulations in force at the time of its manufacture, as well as specific customer specifications. -
Page 5: Transport And Handling
General instructions Transport and handling transforma.earth TRANSPORT AND HANDLING To facilitate its transport, each earthing transformer has 2.2 Crane transport bracing elements on the four upper corners of the tank for its For transporting the earthing transformer by crane, take into transport, to avoid the refrigeration elements from being consideration that the tank allows total suspension of the damaged. -
Page 6: Wheel Transport
2.4 Transport by road and/or shipping by Despite the robust design and construction of Ormazabal earthing transformer, their integrity depends critically on the safety and protection measures used during transport and unloading. -
Page 7: Transporters
Tab. 2.1: Recommended acceleration value limits from IEEE Standard C57.93-2007 2.9 Responsibility Ormazabal reserves the right to not be responsible for damages caused from the transport and handling of its product when the conditions described in this document are not met. -
Page 8: Storage
Storage General instructions transforma.earth STORAGE If storing the earthing transformer (for example, if it will not be put into service immediately), the following recommendations should be followed: ► Store the earthing transformer in a clean and dry place. ► If the earthing transformer is equipped with plug-in terminals, make sure that the conical protector provided with the earthing transformer is protected, to keep the connection terminals in good and clean... -
Page 9: Installation
Ormazabal immediately. If, examined, paying special attention to the following aspects: within a period of 15 days, Ormazabal has not ► The specifications of the earthing transformer received a report of any anomalies or defects found, it indicated on its «Name Plate»... -
Page 10: Earthing Transformer Electrical Connections
Risk of irreversible damage to the machine or the electrical system. CAUTION ► In case of a dielectric fluid leak, contact Ormazabal. Risk of irreversible damage to the machine. ► CAUTION Tightening torques must be used to warranty the correct electrical contact with said connections. - Page 11 General instructions Installation transforma.earth Connect the earthing transformer to the medium voltage (MV) circuit. Use flexible connections that do not exert force on the earthing transformer bushings, with sufficient gauge to avoid excessive heating and, at the same time, allow for the possibility of expansion due to heating, so they do not damage the earthing transformer.
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Page 12: Setup
► Check that the electrical voltage corresponds to the nominal voltage of the earthing transformer. In the event of an anomaly, contact Ormazabal. ► If, after placing the earthing transformer in service, an adjustment must be made, follow the safety instructions specified in Section 6.1 of these general instructions document,... - Page 13 General instructions Setup transforma.earth Adjust the electrical voltage on the earthing transformer using the corresponding tap changer, keeping in mind the safety requirements described in the previous warning: IG168-007 Fig. 5.1: Tap changer detail Apply the charge gradually, until reaching operational power, being careful that the earthing transformer’s temperature does not surpass a value of 105 °C.
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Page 14: Maintenance
► be damaged from the these installations. If there is a dielectric fluid leak, contact Ormazabal. Check that there are no dielectric fluid leaks IG-286-EN version 01... - Page 15 General instructions Maintenance transforma.earth Operation Elements to control Frequency Observations Verify conditions of use, the contacts Accessories with alarm and 1 time every 2 years and measure the the electrical circuit firing contact insulation Terminal box 1 time every 2 years Check connections and clean dirt off Check the condition of the silica gel If Silica gel...
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Page 16: Repairs
Ormazabal. If the repair or modification is performed by a company other than Ormazabal, the repairer must incorporate a plate on the machine with the modification or repair that they have performed and the new properties of the machine. -
Page 17: Additional Information
General instructions Additional information transforma.earth ADDITIONAL INFORMATION 7.1 Reliability The earthing transformer which, as tests show, leaves the factory free of defects, is prepared to provide service for its entire «service life». However, it is essential that the level of reliability be maintained during its handling, storage, and transport, and that it be put into service with the appropriate verifications and protections established in medium voltage... -
Page 18: Attachment
Attachment General instructions transforma.earth ATTACHMENT The recommended tightening torques for the medium voltage (MV) and low voltage (LV) connections, are as follows. Metric Size Key Size Low voltage (LV) • Connection between nuts. 15-20 70-100 250-350 • Attaching the blades to the bolt 25-35 40-60 85-95... - Page 20 Ormazabal Cotradis Subject to changes Transformadores without prior notice. LOECHES For more information, (Spain) contact Ormazabal. www.ormazabal.com...
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