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Summary of Contents for Arteche DDB Series
- Page 1 USER MANUAL HIGH VOLTAGE INSTRUMENT TRANSFORMERS DDB/DFK DDN/DFN CONTENTS PRELIMINARY CONSIDERATIONS INTRODUCTION TRANSPORT AND HANDLING INSTALLATION INSPECTION AND MONITORING QUICK TROUBLESHOOTING GUIDE ANNEX I ANNEX II ANNEX III...
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Page 2: Preliminary Considerations
PRELIMINARY CONSIDERATIONS OBSERVATIONS/ Keep the instruction manual in a safe and accessible place ARTECHE is not liable for accidents due to causes unrelated to to ensure that any operation or maintenance task can be our guidelines. performed quickly and easily when necessary. -
Page 3: Scope Of Application
This manual describes the construction, installation, commissioning and monitoring for safe use of a high-voltage instrument transformer insulated by oil-paper. SCOPE OF APPLICATION/ The manual applies to the following transformers: › Capacitive Voltage Transformers, DDB Series, Models: DDB-72..170. › Capacitive Voltage Transformers, DFK Series, Models: DFK-245..765. › Coupling Capacitors, DDN Series, Models DDN-72..170. -
Page 4: Transport And Handling
Attach pictures of the damaged transformers with the report. etc. Any anomaly must be indicated on the transport › Possible damage to the packaging: Dents on the outside, open company’s receipt sheet and communicated to ARTECHE or packaging, etc. the equipment supplier. ›... -
Page 5: Installation
User manual The slings must be attached to the upper fl ange area of the Indications for units consisting of several capacitor units: insulator to prevent it from tipping over during the operation › For the lower unit, proceed as described above. (see fi... -
Page 6: Electrical Connections
User manual ELECTRICAL CONNECTIONS/ Primary connections A faulty contact or a bad connection can lead to rapid transformer deterioration Do not use the secondary terminal block as a step A platform lift or ladder should be used to make or check the primary connections, CAUTION upholding the necessary safety conditions for work at height. - Page 7 2. Dielectric tests: damage to the unit. d. Electrical tests to evaluate the insulation of the equipment. We at Arteche, as manufacturers, do not establish any specifi c For the test procedure, see Annex III. measures, since the decision depends on: 3.
- Page 8 For this reason, if the value of the delta tangent is above the recommended value or has increased, a careful investigation should be carried out and further testing may be required. In this case, contact Arteche for assistance. For details on the test procedure, follow Annex III.
- Page 9 ARTECHE Oil stains Tighten the screws and bolts, clean the Loose junctures area and keep it under observation. If the leak persists, contact ARTECHE Cracks or damage to components Contact ARTECHE Remove the transformer from Non-visible oil level...
- Page 10 User manual - Annex I High Voltage Instrument Transformers | DDB/DFK/DDN/DFN ANNEX I HANDLING AND CONNECTION › › › › DDB-72..170 DFK-245..765 DDN-72..170 DFN-245..765...
- Page 11 User manual - Annex I › Fig. 1: Handling THE UNIT IS FIXED BY MEANS OF THE 4 FIXING SCREWS FIXING SCREW 4 NUTS ARE USED TO FIX IT 4 FIXING SCREWS TO THE PACKAGING. REMOVE THEM FOR UNPACKING DO NOT TOUCH - OILTIGHTNESS DO NOT TOUCH - OILTIGHTNESS ›...
- Page 12 User manual - Annex I › Fig. 3: Protective cover › Fig. 4: Connection cable for capacitor units › Fig. 5: Assembly between capacitor units High Voltage Instrument Transformers | DDB/DFK/DDN/DFN...
- Page 13 User manual - Annex I › › Fig. 6: Level indicator Fig. 7: Neutral grounding connection › › Fig. 8a: HF grounding without carrier accessories Fig. 8b: HF connection with carrier accessories › Fig. 9: Short-circuit cable of capacitor unit Remove only before energizing ›...
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Page 14: Tightening Torques
User manual - Annex II High Voltage Instrument Transformers | DDB/DFK/DDN/DFN ANNEX II TIGHTENING TORQUES TORQUE WRENCH SETTING (Nm) SCREW TYPE TORQUE WRENCH SETTING M12/16/20 Fixing the insulator to the base 30 Nm Support between capacitor units 30 Nm Insulator fl ange to intermediate plate 30 Nm Connection cable between capacitor units 12 Nm... - Page 15 However, it is normal for pre-operative tests to be performed in order to confi rm certain important equipment values. The following is a guide to the most common on-site tests and the proper way to perform them on ARTECHE brand transformers.
- Page 16 User manual - Annex III MEASUREMENT OF CAPACITANCE AND DIELECTRIC DISSIPATION FACTOR (tan δ The purpose of this test is to assess the insulation of the HV Tanδ and capacitance measurement can also be performed in transformer. the fi eld using other low voltage test bridges and a transportable high voltage test set capable of measuring voltages up to the NOTE: Field testing of tanδ...
- Page 17 User manual - Annex III Capacitance of each capacitor unit Test procedure for the lower capacitor unit: The capacitance of each capacitor unit can be measured directly › Disconnect the HF connection to ground. between the fl anges of the insulators, with the exception of the ›...
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Page 18: Insulation Resistance Measurement
User manual - Annex III INSULATION RESISTANCE MEASUREMENT The measurement of the insulation resistance is done to check In the case of new equipment, the value obtained does not the integrity of the transformer insulation and to ensure that it provide any information, unless a short circuit is detected. - Page 19 User manual - Annex III TRANSFORMER RATIO TEST The Portable Transformer Ratio Meter (TTR) is commonly used The TTR contains 4 terminals (this confi guration may vary to measure the ratio, excitation current and polarity of windings. depending on the manufacturer): ›...
- Page 20 User manual MU_HV_DDB_DFK_DDN_DFN_EN V: A0 09/04/2021 ©ARTECHE Visit our website at arteche.com for more information Subject to changes without notice...
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