OIL TRANSFORMER HV/LV INSTALLATION AND USE MANUAL
The oil transformer mentioned in the test report attached has been designed and produced by TESAR in order to comply with the current Italian CEI and international IEC Standards (unless different agreement).
Compatible Electromagnetic Fields
A limited amount of low frequency magnetic field is emitted by the windings, but its intensity is neither more nor lower than that of the connections' and the low voltage bars' fields. As the distance from the transformer increases, its value rapidly drops.
According to paragraph 5.4.2 of the "Guide to the application of the Directive 89/336/EEC," which excludes the following from the scope of the Directive's application:
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CE marking
According to paragraph 5.4.2 of the "Guide to the application of the Directive 89/336/EEC," which excludes the following from the scope of the Directive's application:
• High voltage transformer; high voltage inductor
This document seeks to instruct readers on the characteristics of transformers used for power and distribution that are insulated with mineral, silicone, or vegetable oil. We think about two different kinds of transformers:
- Hermetically sealed, fully filled (Fig. 1) - Conservator breathing (Fig. 2)
TABLE OF CONTENTS OIL TRANSFORMER HV/LV INSTALLATION AND USE MANUAL
1 INTRODUCTION
1.1 Reference standard
1.2 Electromagnetic compatibility
1.3 Marking CE
2 GENERAL
3 OUTLINE OF THE TRANSFORMER AND THE ACCESSORIES
4 RECEPTION, HANDLING, STORAGE
4.1 Reception
4.2 Handling
4.3 Storage
5 INSTALLATION
5.1 Standard installation conditions
5.2 Ventilation
5.3 Insulating distances
5.4 Earthing connections
5.5 LV and HV connections
5.6 Regulation of transformation ratio
5.7 Parallel connection of transformers
6 TRANSFORMER PROTECTIONS
6.1 Over temperature protection
6.2 Overloading and short circuit protection
6.3 Protection against over voltages
7 COMMISSIONING
7.1 Mechanical checks before the commissioning
7.2 Electrical checks before the commissioning
7.3 Insulating fluid level
7.4 Arcing horns
7.5 Air dryer
7.6 Buchholz Relay
7.7 Thermometer
7.8 Integrated safety device
7.9 Operations for commissioning
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OIL TRANSFORMER HV/LV INSTALLATION AND USE MANUAL
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