Biddle TTR20_UG 电路图.pdf

AVTMTTR20 Rev. A August 2005 Instruction Manual AVTMTTR20 for TTR20 Handheld TTR Transformer Turn Ratio Test Set Catalog No. TTR20 High-Voltage Equipment Read the entire manual before operating. Aparato de Alto Voltaje Antes de operar este producto lea este manual enteramente. M 2621 Van Buren Ave Norristown, PA 19403-2329 610-676-8500 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 TTR20 Handheld TTR Transformer Turn Ratio Test Set Instruction Manual RadioFans.CN 收音机爱 好者资料库 Copyright Notice Copyright 2005 by Megger. All rights reserved. Disclaimer Notice The information contained in this manual is believed to be adequate for the intended use of the product. If the product or its individual instrument are used for purposes other than those specified herein, confirmation of their validity and suitability must be obtained from Megger. Refer to the warranty information included at the end of this instruction manual. Specifications are subject to change without notice. WARRANTY Products supplied by Megger are warranted against defects in material and workmanship for a period of one year following shipment. Our liability is specifically limited to replacing or repairing, at our option, defective equipment. Equipment returned to the factory must be shipped prepaid and insured. This warranty does not include batteries, lamps, or other expendable items, where the original manufacturers warranty shall apply. We make no other warranty. The warranty is void in the event of abuse (failure to follow recommended operating procedures) or failure by the customer to perform specific maintenance as indicated in this manual. AVTMTTR20 Rev A AUGUST 2005 i TABLE OF CONTENTS 1 INTRODUCTION.1 About the TTR20.1 Electrical Theory and Practice .2 Applications for the TTR20.4 Upon Receipt of the TTR20.5 Safety First .5 How to Use This Manual.5 2 SAFETY.7 Overview.7 Safety Requirements .7 Cautions and Warnings.8 3 CONTROLS and the X terminals on the test lead set must be connected to the H terminals on the CT. NOTE: Dots on the housing of the transformer are commonly used to identify terminals of the same polarity. F WARNING Failure to observe proper connections will result in a safety hazard and may result in damage to the test set or CT. Failure to observe voltage rating of low-current X winding may result in damage to the CT. NOTES: 1. The TTR20 may supply up to 100 mA of excitation current. The TTR20 will automatically select the appropriate test voltage (8 V, 1.5 V, or 0.5 V) when testing CTs. Some current transformers with turn ratio of 50:5 and less may require more than 100 mA of excitation current when excited from 0.5 V source. These CTs can not be tested with the TTR20. 2. Expect that polarity of the windings is normal (“+” sign is displayed in front of the turns ratio test result). M AVTMTTR20 Rev A AUGUST 2005 18 Unmounted CTs NOTE: The illustrated connection diagrams are provided as connection guides and do not suggest the physical location of the bushings / terminals of the device being tested. Figure 4-8 shows the setup for testing unmounted current transformers. Figure 4-9 shows the setup for testing the taps on a multiple-tap CT. Figure 4-8 Setup for Testing Unmounted Current Transformer Figure 4-9 Setup for Testing Taps on Multiple Tap CT TTR20 X1 LEAD X1 LEAD H1 LEAD X1 LEAD X1 X2 X3 X4 X5 TRANSFORMER H1 H2 POLARITY DOT X1 LEAD H1 CT H1 LEAD X1 X2 H2 LEAD H2 X2 LEAD BUS OR USE HEAVY GAUGE LEAD WIRE Setup, Connections 9-pin D-type connectors, null modem female-male RS232 cable (for the optional serial printer connection. The cable is included in optional printer package) Data exchange rate: up to 57.6 Kbaud for the field firmware upgrading and 19.2 Kbaud for test report printing on the optional serial printer Environmental Conditions Operating temperature range: -15 to 55 C (5 to 130F) Storage temperature range: -50 to 60 C (-60 to 140F) Relative humidity: to 90% noncondensing (operating) 95% noncondensing (storage) Physical Data Dimensions: (240 x 115 x 50 mm) (H x W x D) 9.5 x 4.5 x 1.9 in. Weight Test Set: 890 g (1.9 lbs.) with Leads 1.4 kg (3.1 lbs.) M AVTMTTR20 Rev A AUGUST 2005 38 Optional Accessories ? Battery/line-powered serial thermal printer package for 120 V ac (p/n 35755-1). The package includes the thermal printer, a battery pack, an AC adapter and an interface cable. ? Battery/line-powered serial thermal printer package for 230 V ac (p/n 35755-2). The package includes the thermal printer, a battery pack, an AC adapter and interface cable. ? Lead sets for single phase transformer testing, shielded, heavy-duty clip-end terminated. The leads are marked according to ANSI Standards. ? Additional printer paper, one roll, (p/n 26999) ? USB Serial Adapter (p/n 35871) for connecting a TTR20 RS232 port to a PC USB port. The adapter is used if a PC does not have an RS232 port. ? Battery Replacement (six required) p/n 35956 AVTMTTR20 Rev A AUGUST 2005 39 Appendix B ORDERING INFORMATION VX represents rated voltage on the low-voltage winding. M AVTMTTR20 Rev A AUGUST 2005 42 T- Type Transformers T-type transformers represent a special type of three-phase transformers. This transformer may be tested as a single phase transformer. To make a measurement on a T-type transformer, the jumpers indicated in Table C-1 should be applied to the appropriate terminals of the T-type transformer. The TTR20 measured turns ratio should be compared to the calculated turns ratio indicated in Table C-1. Notes to Table C-1 1. Any connection(s) to ground/case of T-type transformer on H or X side should be removed before testing a transformer. 2. Expect that polarity of the windings is normal (“+” sign is displayed in front of the turns ratio test result) Table C-1 ANSI Transformer Winding Phase Relationship Winding Connection Winding Tested IEC Vector Group High-Voltage Winding (H) Low-Voltage Winding (X) External Jumpers Phase tested High- Voltage Winding Low- Voltage Winding Calculated Turn Ratio T-T 0 X1 - H1 -H2 X1 -X2 A B H1 - H2 H1 H3 X1 - X2 X1 X3 X H V V X H V V T-T 30 lag H1 H2 -H3 X1 -X2 A B H1 H3 H2 H3 X1 - X2 X1 X3 2 3 X H V V 3 2 X H V V T-T 30 lead H2 -H3 X1 X3 A B H1 H3 H2 H3 X1 X3 X2 X1 2 3 V V X H 3 2 X H V V Appendix C AVTMTTR20 Rev A AUGUST 2005 43 Notes to Table C-2 Transformer terminal markings for distribution and power transformers marked in accordance with requirements of American National Standard Institute, Inc (ANSI) standard C57.12.70 1978. Definition of Symbol Designations H1, H2, H3 External terminals on HV transformer winding. X1, X2, X3 External terminals on LV transformer winding. H0 External neutral terminal on HV transformer winding. X0 External neutral terminal on LV transformer winding. * Inaccessible neutral point on HV or LV transformer winding. VH Nameplate voltage rating (line-to-line) of HV transformer winding. VX Nameplate voltage rating (line-to-line) of LV transformer winding. A, B, C Winding tested on HV side of transformer. a, b, c Winding tested on LV side of transformer. M AVTMTTR20 Rev A AUGUST 2005 44 Table C-2 ANSI Transformer Winding Phase Relationship Copyright 1999 Megger Winding Connection Winding Tested Diag No. IEC Vector Group High-Voltage Winding Low-Voltage Winding Phase Tested External Jumpers High- Voltage Winding Low- Voltage Winding Measured Turn Ratio 1 1 1ph0 1 H1 - H2 X1 - X2 X H V V 2 1 1ph6 1 H1 - H2 X2 - X1 V V H X 3 Dd0 A B C H1 - H3 H2 - H1 H3 - H2 X1 - X3 X2 - X1 X3 - X2 X H V V 4 Dd6 A B C H1 - H3 H2 - H1 H3 - H2 X3 - X1 X1 - X2 X2 - X3 X H V V 5 Dyn1 A B C H1 - H3 H2 - H1 H3 - H2 X1 - X0 X2 - X0 X3 - X0 V V H X 3 6 Dyn7 A B C H1 - H3 H2 - H1 H3 - H2 X0 - X1 X0 - X2 X0 - X3 X H V 3V 7 YNyn0 A B C H1 - H0 H2 - H0 H3 - H0 X1 - X0 X2 - X0 X3 - X0 V V H X Appendix C AVTMTTR20 Rev A AUGUST 2005 45 Table C-2 ANSI Transformer Winding Phase Relationship Copyright 1999 Megger Winding Connection Winding Tested Diag No. IEC Vector Group High-Voltage Winding Low-Voltage Winding Phase Tested External Jumpers High- Voltage Winding Low- Voltage Winding Measured Turn Ratio 8 YNyn6 A B C H1 - H0 H2 - H0 H3 - H0 X0 - X1 X0 - X2 X0 - X3 X H V V 9 YNd1 A B C H1 - H0 H2 - H0 H3 - H0 X1 - X2 X2 - X3 X3 - X1 V V H X 3 10 YNd7 A B C H1 - H0 H2 - H0 H3 - H0 X2 - X1 X3 - X2 X1 - X3 3V V X H 11 Dy1 A B C H3 - H2 H1 - H3 H2 - H1 H1 - H3 H2 - H1 H3 - H2 X1 - * X2 - * X3 - * V V H X 3 12 Dyn5 A B C H1 - H3 H2 - H1 H3 - H2 X3 - X0 X1 - X0 X2 - X0 X H V 3V 13 Dy5 A B C H3 - H2 H1 H3 H2 H1 H1 - H3 H2 H1 H3 - H2 X3 - * X1 - * X2 - * X H V 3V M AVTMTTR20 Rev A AUGUST 2005 46 Table C-2 ANSI Transformer Winding Phase Relationship Copyright 1999 Megger Winding Connection Winding Tested Diag No. IEC Vector Group High-Voltage Winding Low-Voltage Winding Phase Tested External Jumpers High- Voltage Winding Low- Voltage Winding Measured Turn Ratio 14 Dy7 A B C H3 - H2 H1 - H3 H2 - H1 H1 - H3 H2 - H1 H3 - H2 * - X1 * - X2 * - X3 V V H X 3 15 Dyn11 A B C H1 - H3 H2 - H1 H3 - H2 X0 - X3 X0 - X1 X0 - X2 V V H X 3 16 Dy11 A B C H3 - H2 H1 - H3 H2 - H1 H1 - H3 H2 H1 H3 - H2 * - X3 * - X1 * - X2 X H V 3V 17 Dz0 A B C H1 - H3 H2 - H1 H3 - H2 X1 - X3 X2 - X1 X3 - X2 V V H X 18 Dz6 A B C H1 - H3 H2 - H1 H3 - H2 X3 - X1 X1 - X2 X2 - X3 V V H X 19 YNy0 A B C H2- H0 H3 - H0 H1 - H0 H1 - H0 H2 - H0 H3 - H0 X1 - * X2 - * X3 - * V V H X Appendix C AVTMTTR20 Rev A AUGUST 2005 47 Table C-2 ANSI Transformer Winding Phase Relationship Copyright 1999 Megger Winding Connection Winding Tested Diag No. IEC Vector Group High-Voltage Winding Low-Voltage Winding Phase Tested External Jumpers High- Voltage Winding Low- Voltage Winding Measured Turn Ratio 20 Yyn0 A B C H1 - H3 H2 - H1 H3 - H2 X1 - X3 X2 - X1 X3 - X2 V V H X 21 Yy0 A B C H1 - H3 H2 - H1 H3 - H2 X1 - X3 X2 - X1 X3 - X2 V V H X 22 YNy6 A B C H2- H0 H3 - H0 H1 - H0 H1 - H0 H2 - H0 H3 - H0 * - X1 * - X2 * - X3 V V H X 23 Yyn6 A B C H1 - H3 H2 - H1 H3 - H2 X3 - X1 X1 - X2 X2 - X3 V V H X 24 Yy6 A B C H1 - H3 H2 - H1 H3 - H2 X3 - X1 X1 - X2 X2 - X3 V V H X 25 Yzn1 A B C H1 - H3 H2 - H1 H3 - H2 X1 - X0 X2 - X0 X3 - X0 V V H X 3 M AVTMTTR20 Rev A AUGUST 2005 48 Table C-2 ANSI Transformer Winding Phase Relationship Copyright 1999 Megger Winding Connection Winding Tested Diag No. IEC Vector Group High-Voltage Winding Low-Voltage Winding Phase Tested External Jumpers High- Voltage Winding Low- Voltage Winding Measured Turn Ratio 26 Yz1 A B C H3 - H2 H1 - H3 H2 - H1 H1-(H3+H2) H2 (H1+H3) H3-(H2+H1) X1 - X2 X2 - X3 X3 - X1 V V H X 3 2 27 Yzn5 A B C H1 - H3 H2 - H1 H3 - H2 X3 - X0 X1 - X0 X2 - X0 V V H X 3 28 Yz5 A B C H3 - H2 H1 - H3 H2 - H1 H1-(H3+H2) H2-(H1+H3) H3-(H2+H1) X3 - X1 X1 - X2 X2 - X3 V V H X 3 2 29 Yzn7 A B C H1 - H3 H2 - H1 H3 - H2 X0 - X1 X0 - X2 X0 - X3 V V H X 3 30 Yz7 A B C H3 - H2 H1 - H3 H2 - H1 H1-(H3+H2) H2-(H1+H3) H3-(H2+H1) X2 - X1 X3 - X2 X1 - X3 V V H X 3 2 31 Yzn11 A B C H1 - H3 H2 - H1 H3 - H2 X0 - X3 X0 - X1 X0 - X2 V V H X 3 Appendix C AVTMTTR20 Rev A AUGUST 2005 49 Table C-2 ANSI Transformer Winding Phase Relationship Copyright 1999 Megger Winding Connection Winding Tested Diag No. IEC Vector Group High-Voltage Winding Low-Voltage Winding Phase Tested External Jumpers High- Voltage Winding Low- Voltage Winding Measured Turn Ratio 32 Yz11 A B C H3 - H2 H1 - H3 H2 - H1 H1-(H3+H2) H2-(H1+H3) H3-(H2+H1) X1 - X3 X2 - X1 X3 - X2 V V H X 3 2 33 ZNy5 A B C H1 - H0 H2 - H0 H3 - H0 X3 - X1 X1 - X2 X2 - X3 V V H X 3 34 Zy5 A B C H3 - H2 H1 - H3 H2 - H1 H1-(H3+H2) H2-(H1+H3) H3-(H2+H1) X3 - X1 X1 - X2 X2 - X3 V V H X 3 2 35 ZNy11 A B C H1 - H0 H2 - H0 H3 - H0 X1 - X3 X2 - X1 X3 - X2 V V H X 3 36 Zy11 A B C H3 - H2 H1 - H3 H2 - H1 H1-(H3+H2) H2-(H1+H3) H3-(H2+H1) X1 - X3 X2 - X1 X3 - X2 V V H X 3 2 37 Yd1 A B C H3 - H2 H1 - H3 H2 - H1