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Summary of Contents for Arteche CA Series
- Page 1 USER MANUAL HIGH VOLTAGE INSTRUMENT TRANSFORMERS CA / UT / KA 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 to ARTECHE is not liable for accidents due to causes unrelated to ensure that any operation or maintenance task can be performed our guidelines. 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 with oil-paper insulation. SCOPE OF APPLICATION/ The manual applies to the following transformers: › Current Transformers, CA Series, Models: CA-36..800. › Inductive Voltage Transformers, UT Series, Models UTx-52..525. › Combined Transformers, KA Series, Models KA-36..245. -
Page 4: Transport And Handling
Possible damage to the packaging: Bumps on the outside, oil oil, etc. Any anomaly must be indicated on the transport stains on the outside of the packaging, open packaging, etc. company’s receipt sheet and communicated to ARTECHE or the › Possible damage to equipment: Broken or defective insulator, equipment supplier. -
Page 5: Installation
ARTECHE or the supplier of the equipment must Carefully check to make sure that all four legs of the device sit be informed (Fig. 5). -
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 To make or check the primary connections, a lifting platform or a ladder should be used, CAUTION maintaining the necessary safety conditions for work at height. - Page 7 3. Oil tests: We at Arteche, as manufacturers, do not establish any specifi c e. Tests performed on oil samples. The oil tests analyze the measures, since the decision depends on: state of the insulating liquid and show the properties of the system in general.
- 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 For fi...
- Page 9 If the leak persists, contact Arteche Oil stains Tighten the screws and bolts, clean the Loose junctions area and keep it under observation. If the leak persists, contact Arteche Cracks or damage to components Contact Arteche Remove cover eliminate...
- Page 10 User Manual - Annex I High Voltage Instrument Transformers | CA/UT/KA ANNEX I HANDLING AND CONNECTION › › › › CA-36..800 KA-36..245 UTx-52..300 UTx-420..525...
- Page 11 User Manual - Annex I › CA-36..800 › KA-36..245 › UTx-52..300 › UTx-420..525 › Fig. 1: Lifting High Voltage Instrument Transformers | CA/UT/KA...
- Page 12 User Manual - Annex I › › CA-36..800 KA-36..245 › › › › › CA-36..800 KA-36..245 UTx-52..300 UTx-420..525 <1,600kg <1,600kg UTx-420..525 › 2: Movement not allowed › 3: Movement Fig. Fig. › Fig. › CA-362..800 › KA-170..245 › UTx-52..300 >1,600kg >1,600kg ›...
- Page 13 User Manual - Annex I › Fig. 5: Level indicator › Fig. 6: Oil Compensator Protection › › Fig. 7: Primary diagram plate next to the terminal Fig. 8: Primary diagram plate under the protective cover › Fig. 9: Neutral Grounding ›...
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Page 14: Tightening Torques
User Manual - Annex II High Voltage Instrument Transformers | CA/UT/KA ANNEX II TIGHTENING TORQUES Torque wrench setting (Nm) Screw type Torque wrench setting M12/16/20 Fixing the insulator to the base 30 Nm M10/12 Tangent Delta measurement tap 30 Nm M10/12 Primary reconnection taps 30/40 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.
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Page 16: Current Transformers
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 The fi eld measurement of tanδ for transformers that are transformer. already equipped with capacitive test taps (tanδ tap) can be carried out in the same manner as at the factory. - Page 17 User Manual - Annex III INDUCTIVE VOLTAGE TRANSFORMERS/ It is recommended that the test be carried out at a voltage of › HV (GST) test for transformers without tanδ tap (Fig. 4): 10 kV AC. • The test must be performed in GST ( Ground Specimen Test) mode.
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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 INDUCTIVE VOLTAGE TRANSFORMERS/ Primaries vs. Secondaries+ Ground N/S+G (Fig. 8) Between secondaries S/S › The line cable of the measuring equipment must be connected › This test is only applicable to transformers having more than to the terminals of the primary winding (A-N) that are short- 1 secondary.
- Page 20 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 21 User Manual - Annex III INDUCTIVE VOLTAGE TRANSFORMERS/ This test verifi es the transformer ratio and polarity, and displays › The clamps marked “X” will be connected to the transformer’s a “+” signal if correct, and a “-” signal if inverted. To carry out the secondary terminals: test, proceed as follows (Fig.
- Page 22 User Manual MU_HV_CA_UT_KA_EN V: A0 27/11/2020 ©ARTECHE For more detailed information, please visit us at arteche.com Subject to change without notice...
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