Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Document Number: ECP 11-0515a Date: 23/05/2016 LUCY HV AIR METERING UNIT 3 LIMB TEST FORM Full Postal Address Import MPAN Export MPAN Substation Name Substation Number Metering Unit Serial No Metering Unit Make/Type Lucy Sabre AMU System Configuration 3-PHASE 3-WIRE Current Transformer L1 L3 Location METERING UNIT METERING Unit Serial Number ** Burden (output VA) *** Accuracy Class VA VA 0.5 0.5 Type WOUND WOUND Available Ratios 400/200/100/5A 400/200/100/5A Make *** Ratio Selected A A Pole P1 Facing Distribution System? YES / NO * Voltage Transformer L1 L2 L3 Location METERING UNIT METERING UNIT METERING UNIT YES / NO * Serial Number ** Burden (output VA) *** Accuracy Class VA VA VA 0.5 0.5 0.5 Type 3P 3P 3P Available Ratios 11000/6600/110V 11000/6600/110V 11000/6600/110V Make** Ratio Selected V V * Delete as applicable. ** Available from manufacturers test certificates. *** Available from nameplate. V THIS IS AN UNCONTROLLED DOCUMENT, THE READER MUST CONFIRM ITS VALIDITY BEFORE USE Version: 5.0 Lucy HV Air Metering Unit 3 Limb Test Form Document Number: ECP 11-0515a Version: 5.0 Date: 23/05/2016 Voltage Transformer Tests VT Configuration Checks Check metering multi-core cable disconnected () Check correct metering VT ratio selected (terminals 31 to 39) see TABLE 1 below () Ensure label on lid of terminal box matches VT voltage ratio selected () Check VT fuse ratings are correct (6A) and continuity () Check 110V auxiliary fuse ratings are correct (2A) and continuity () Check LV links are installed () Check HV links are closed in tank () TABLE 1 Metering VT Voltage Range Selection Phase Metering VT 11000/110V Common Metering VT 6600/110V L1 E210 (33) E11 (32) E110 (31) L2 E230 (36) E31 (35) E130 (34) L3 E250 (39) E51 (38) E150 (37) VT Insulation Resistance – 1kV Insulation Resistance Tester Check secondary earth link in place (terminal 46) () Measure the insulation resistance of VT primary (HV) winding (L1 to Earth) M Disconnect the secondary earth link (terminal 46) () Measure insulation resistance of VT secondary winding (across terminal 46) M Reconnect the secondary earth link (terminal 46) () © UK Power Networks 2017 All rights reserved 2 of 7 Lucy HV Air Metering Unit 3 Limb Test Form Document Number: ECP 11-0515a Version: 5.0 Date: 23/05/2016 VT Phasing Check – Primary Injection Remove LV fuses/links L1, L2, L3 and N () Check the metering circuit breaker is open () Apply 240/110V ac from an injection test set to the primary (HV) winding, measure each of the secondary (LV) winding voltages and compare to the values in the table below Primary (HV) Winding Voltage Secondary (LV) Winding Voltage (measured at fuse) HV L1 – L2 (Fuses) L2 – L3 (Fuses) L3 – L1 (Fuses) L1 L2 V (nominal) V (< nominal) V (< nominal) L2 L3 V (< nominal) V (nominal) V (< nominal) L3 L1 V (< nominal) V (< nominal) V (nominal) Replace LV fuses/links L1, L2, L3 and N VT Primary (HV) Rated Voltage () VT Nominal Secondary (LV) Winding Voltage with 240/110V applied to the Primary (HV) Winding 240V 110V 11kV 2.4V 1.1V 6.6kV 4.0V 1.8V © UK Power Networks 2017 All rights reserved 3 of 7 Lucy HV Air Metering Unit 3 Limb Test Form Document Number: ECP 11-0515a Version: 5.0 Date: 23/05/2016 Current Transformer Tests CT Insulation Resistance – 1kV Insulation Resistance Tester CTs isolated or HV dead () Disconnect CT star point earth (terminal 20) () Measure the insulation resistance (D70 – D90 at terminal 20) M Reconnect CT star point earth (terminal 20) () CT Ratio Check – Primary Injection or Prevailing Load* CT Ratio Primary Current CT Ratio Secondary Current Injected Primary Current* Calculated Secondary Current Measured Secondary Current Ratio Correct [A] [B] [C] [D = B / A * C] [E] [E = D] L1 100A 5A 50 / 100A A A A () L3 100A 5A 50 / 100A A A A () L1 200A 5A 50 / 100A A A A () L3 200A 5A 50 / 100A A A A () L1 400A 5A 50 / 100A A A A () L3 400A 5A 50 / 100A A A A () Phase On completion of test ensure correct CT ratio 3 (100A), ratio 2 (200A) or ratio 1 (400A) as specified by designer is selected () * Delete as applicable. CT Polarity – Flick Test Check L1 phase CT polarity – secondary CT connection D11 (+ve) to D70 (-ve) () Check L3 phase CT polarity – secondary CT connection D51 (+ve) to D70 (-ve) () CT Relationship to VT Output L1 CT associated with L1 voltage ** () L3 CT associated with L3 voltage ** () ** If all CT and VT tests are correct the CT relationship to the VT is proven and the above can be ticked © UK Power Networks 2017 All rights reserved 4 of 7 Lucy HV Air Metering Unit 3 Limb Test Form Document Number: ECP 11-0515a Version: 5.0 Date: 23/05/2016 CT Burden Maximum CT burden per phase at metering unit terminal box Maximum CT burden per phase at meter terminal box 1 0.5 VA 7.5 VA Final Checks Reconnect metering multi-core cable (if disconnected) () If metering multi-core cable not connected leave CTs shorted (D11, D51, D70) () Check all covers are secured and appropriate lock fitted to lid () Complete asset data form and submit to ART () Test Equipment Purpose/Make/Type Serial Number Calibration Expiry Date Certification CT and VT calibration certificates attached () All tests completed satisfactorily () Comments Organisation Test Operative Name Date of Tests Test Operative Signature A copy of the completed test form together with the CT/VT calibration certificates shall be placed in a plastic wallet in the metering unit terminal box. A copy of the completed test form together with the CT/VT calibration certificates shall be placed in a plastic wallet in the meter terminal box (for the meter operator). 1 The maximum CT burden is based on 20 metres of 12-core 2.5mm2 or 40 metres of 19-core 2.5mm2 copper cable with a resistance of 0.0068 Ω/m at 20oC and a CT rated secondary current of 5A. © UK Power Networks 2017 All rights reserved 5 of 7 Lucy HV Air Metering Unit 3 Limb Test Form Document Number: ECP 11-0515a Version: 5.0 Date: 23/05/2016 A copy of the completed test forms and the CT/VT calibration certificates shall be sent to the ART mailbox ([email protected], [email protected], [email protected]). © UK Power Networks 2017 All rights reserved 6 of 7 Lucy HV Air Metering Unit 3 Limb Test Form Document Number: ECP 11-0515a Version: 5.0 Date: 23/05/2016 This page is left intentionally blank. © UK Power Networks 2017 All rights reserved 7 of 7 Lucy HV Air Metering Unit 3 Limb Test Form Document Number: ECP 11-0515a Version: 5.0 Date: 23/05/2016 Figure 1 – Lucy Air Metering Unit Figure 2 – Lucy AMU Legend and Wiring Diagram on Rear of Terminal Box Cover Figure 3 – Lucy AMU Terminal Box Cover with Selected VT and CT Ratios (example only) Figure 4 – Lucy AMU Terminal Box with Cover Removed Lucy HV Air Metering Unit 3 Limb Test Form Document Number: ECP 11-0515a Version: 5.0 Date: 23/05/2016