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SFRA Quick Start Guide PN 500-0545 - 1 - 72A-2499-01 Rev.C 09/07 Doble SFRA Qui

SFRA Quick Start Guide PN 500-0545 - 1 - 72A-2499-01 Rev.C 09/07 Doble SFRA Quick Start Guide Introduction This Quick Start Guide shows how to make a good measurement using an M5200 or M5300 test set CAUTION The transformer under test must be completely de-energized and isolated from the system. Follow your own company rules, policies, and government regulations to ensure safety of personnel and property. The transformer and the M5300 test instrument must share a common ground or earthing point. Preparing the Transformer All bushings and windings should be disconnected from any connecting bus and/or insulators. Terminals not under test should be isolated and floating unless otherwise specified. Setting up the Instrument and Software M5300: Start the SFRA M5300 software on the M5300 test set. The M5300 software will start automatically. Double click on the SFRA software icon if necessary. M5200: On your PC install the software only on the C drive, not a network drive. Make sure SFRA M5200 software is running and you have no network connections , no wireless connections active or turned on and no firewall and/or virus software active or enabled (networks, virus software and firewalls interfere with communications with the M5200). Follow the procedure in the table below. 1. Click on Edit and then Edit Apparatus. Select each of the following editors in turn: • Location • Transformer • Test Equipment • Test Organization Enter details for each editor. Make sure to select a template for the transformer. 2. Once you have entered the information, click on Select Apparatus Location (on the) to select the apparatus for test. 3. Click on ‘Start Test’ in the middle of the pane at left. 4. Fill in details in the Test Details window and click on Run Test. Checking Instruments and Leads The Doble SFRA test set and leads are configured for use as in Figure 1 – color coded yellow-red-black. Figure 1 M5300 Test Set and Test Leads SFRA Quick Start Guide PN 500-0545 - 2 - 72A-2499-01 Rev. C 09/07 Start up the Doble SFRA software. Ensure the cables are connected to the test set following the color coded BNC connections. A test lead integrity check may be performed if required: see the Doble SFRA User Guide for details. Connecting Leads to the Transformer and Running Tests When running a test on a transformer winding, for example H1-H0, attach the Red Lead to the H1 bushing and the Black Lead to the H0 bushing, as shown in Figure 4. Figure 4 Connecting Leads to the Transformer to Measure H1-H0 It is important to record nameplate and test arrangement data in the 'Nameplate' section of the software. The following details are a minimum set required for each test. • Manufacturer, serial number • LTC and DETC positions during test • Location • HV/LV/TV, MVA, Impedance • Red and black lead locations • Bushings shorted • LTC and DETC ranges and nominal position • Bushings grounded Changing tap position or DETC position or removing core ground connections will give different SFRA results. This means that where previous results are available, measurements must be made in a manner consistent with those previous results. Care of Equipment Follow the points below to take care of your equipment. • Keep test set and test leads in good order. • Do not pull on test leads as they may break. • Support the weight of the test leads where necessary by use of cable ties or similar. • Cables are made of co-ax and have a 2” minimum bend radius (don't bend cable too tightly.) • If a clip repair is necessary through field damage, keep the center conductor separate from the shield. Typical Results Correct use of the test set and test leads will result in measurements similar to those given in Figure 5. These plots give the results for all three phases of an individual transformer. Figure 5 Typical LV Delta and HV Wye (Star) Winding Results Note When connecting leads to a transformer, ensure that you attach the lead grounds to a stud or bolt at the base of the bushing, and that good electrical contact is established and maintained. SFRA Quick Start Guide PN 500-0545 - 3 - 72A-2499-01 Rev. C 09/07 Test Connections Make sure good electrical connections are made at bushing terminals and at the base of bushings; clean, file or wire brush connection points if necessary. When making short circuit measurements, ensure all three phases are solidly shorted: 1 to 2, 2 to 3, and 3 back to 1. Test connections are given here for some common transformer designs; red lead is first of the two named terminals. For further designs, refer to the Doble Test Connections Guide. Two Winding Transformer Table Test Type Test # 3φ Delta- Wye 3φ Wye- Delta 3φ Delta- Delta 3φ Wye- Wye 1φ Test 1 H1-H3 H1-H0 H1-H3 H1-H0 Test 2 H2-H1 H2-H0 H2-H1 H2-H0 HV Open Circuit (OC) All Other Terminals Floating Test 3 H3-H2 H3-H0 H3-H2 H3-H0 H1-H2 (H1-H0) Test 4 X1-X0 X1-X3 X1-X3 X1-X0 Test 5 X2-X0 X2-X1 X2-X1 X2-X0 LV Open Circuit (OC) All Other Terminals Floating Test 6 X3-X0 X3-X2 X3-X2 X3-X0 X1-X2 (X1-X0) Test 7 H1-H3 H1-H0 H1-H3 H1-H0 Test 8 H2-H1 H2-H0 H2-H1 H2-H0 Short Circuit (SC) High (H) to Low (L) Short [X1-X2-X3] Test 9 H3-H2 H3-H0 H3-H2 H3-H0 H1-H0 Short [X1-X2] Three Winding Transformer Table – Part 1 Test Type Test # 3φ Delta- Delta- Delta 3φ Delta- Delta- Wye 3φ Delta- Wye Delta 3φ Delta- Wye- Wye 1φ Test 1 H1-H3 H1-H3 H1-H3 H1-H3 Test 2 H2-H1 H2-H1 H2-H1 H2-H1 HV Open Circuit (OC) All Other Terminals Floating Test 3 H3-H2 H3-H2 H3-H2 H3-H2 H1-H2 (H1-H0) Test 4 X1-X3 X1-X3 X1-X0 X1-X0 Test 5 X2-X1 X2-X1 X2-X0 X2-X0 LV Open Circuit (OC) All Other Terminals Floating Test 6 X3-X2 X3-X2 X3-X0 X3-X0 X1-X2 (X1-X0) Test 7 Y1-Y3 Y1-Y0 Y1-Y3 Y1-Y0 Test 8 Y2-Y1 Y2-Y0 Y2-Y1 Y2-Y0 Tert Open Circuit (OC) All Other Terminals Floating Test 9 Y3-Y2 Y3-Y0 Y3-Y2 Y3-Y0 Y1-Y2 (Y1-Y0) Test 10 H1-H3 H1-H3 H1-H3 H1-H3 Test 11 H2-H1 H2-H1 H2-H1 H2-H1 Short Circuit (SC) High (H) to Low (L) Short [X1-X2-X3]* Test 12 H3-H2 H3-H2 H3-H2 H3-H2 H1-H0 Short [X1-X2]* Test 13 H1-H3 H1-H3 H1-H3 H1-H3 Test 14 H2-H1 H2-H1 H2-H1 H2-H1 Short Circuit (SC) High (H) to Tertiary (T) Short [Y1-Y2-Y3]* Test 15 H3-H2 H3-H2 H3-H2 H3-H2 H1-H0 Short [Y1-Y2]* Test 16 X1-X3 X1-X3 X1-X0 X1-X0 Test 17 X2-X1 X2-X1 X2-X0 X2-X0 Short Circuit (SC) Low (L) to Tertiary (T) Short [Y1-Y2-Y3]* Test 18 X3-X2 X3-X2 X3-X0 X3-X0 X1-X0 Short [Y1-Y2]* Three Winding Transformer Table – Part 2 SFRA Quick Start Guide PN 500-0545 - 4 - 72A-2499-01 Rev. C 09/07 Test Type Test # 3φ Wye- Wye- Wye 3φ Wye- Wye- Delta 3φ Wye- Delta- Wye 3φ Wye- Delta- Delta Test 1 H1-H0 H1-H0 H1-H0 H1-H0 Test 2 H2-H0 H2-H0 H2-H0 H2-H0 HV Open Circuit (OC) All Other Terminals Floating Test 3 H3-H0 H3-H0 H3-H0 H3-H0 Test 4 X1-X0 X1-X0 X1-X3 X1-X3 Test 5 X2-X0 X2-X0 X2-X1 X2-X1 LV Open Circuit (OC) All Other Terminals Floating Test 6 X3-X0 X3-X0 X3-X2 X3-X2 Test 7 Y1-Y0 Y1-Y3 Y1-Y0 Y1-Y3 Test 8 Y2-Y0 Y2-Y1 Y2-Y0 Y2-Y1 Tert Open Circuit (OC) All Other Terminals Floating Test 9 Y3-Y0 Y3-Y2 Y3-Y0 Y3-Y2 Test 10 H1-H0 H1-H0 H1-H0 H1-H0 Test 11 H2-H0 H2-H0 H2-H0 H2-H0 Short Circuit (SC) High (H) to Low (L) Short [X1-X2-X3]* Test 12 H3-H0 H3-H0 H3-H0 H3-H0 Test 13 H1-H0 H1-H0 H1-H0 H1-H0 Test 14 H2-H0 H2-H0 H2-H0 H2-H0 Short Circuit (SC) High (H) to Tertiary (T) Short [Y1-Y2-Y3]* Test 15 H3-H0 H3-H0 H3-H0 H3-H0 Test 16 X1-X0 X1-X0 X1-X3 X1-X3 Test 17 X2-X0 X2-X0 X2-X1 X2-X1 Short Circuit (SC) Low (L) to Tertiary (T) Short [Y1-Y2-Y3]* Test 18 X3-X0 X3-X0 X3-X2 X3-X2 Auto-Transformer Table Test Type Test # 3φ 1φ Test 1 H1-X1 Test 2 H2-X2 Series Winding (OC) All Other Terminals Floating Test 3 H3-X3 H1-X1 Test 4 X1-H0X0 Test 5 X2-H0X0 Common Winding (OC) All Other Terminals Floating Test 6 X3-H0X0 X1-H0X0 Test 7 Y1-Y3 Test 8 Y2-Y1 Tertiary Winding (OC) All Other Terminals Floating Test 9 Y3-Y2 Y1-Y2 (Y1-Y0) Test 10 H1-H0X0 Test 11 H2-H0X0 Short Circuit (SC) High (H) to Low (L) Short [X1-X2-X3] Test 12 H3-H0X0 H1-H0X0 Short [X1-H0X0] Test 13 H1-H0X0 Test 14 H2-H0X0 Short Circuit (SC) High (H) to Tertiary (Y) Short [Y1-Y2-Y3] Test 15 H3-H0X0 H1-H0X0 Short [Y1-Y2] Test 16 X1-H0X0 Test 17 X2-H0X0 Short Circuit (SC) Low (L) to Tertiary (Y) Short [Y1-Y2-Y3] Test 18 X3-H0X0 X1-H0X0 Short [Y1-Y2] Limitation in Liability "The limitations on liability and copyright notices contained in page ii of the Doble SFRA User Guide shall apply to the use of this quick start guide and are hereby incorporated by reference." 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