VoltageTester& PhasingOut

Transcription

1 VoltageTester& PhasingOut. Deviqefor 11& 33kV Systems.. "",- OPERATING AND MAINTENANCE INSTRUCTIONS

2 EDGCUMBE INST~UMENTS LIVE LINE TEST EQUIPMENT INSTRUCTIONS FOR USE General The equipment is designed for use on systems of up to 33kV. It is used for two purposes. 1) To establish the potential between a conductor and earth (ground). 2) To identify the corresponding coincide. phases of two systems whose voltage vectors Separate sets of equipment are available for use on 11kV and 33kV systems. 1) 2) 11 kv systems (scaled 0-15kV) 33kV systems (scaled 0-40kV) Note: On 13.8 systems, the voltmeter is scaled 0-20kV. 11kV 33kV

3 Index Page No. General Safety Rules List of Equipment Assembling the Equipment Using the Equipment After Use Maintenance Mechanical and Environmental Specification Electrical Specification 11 Safety Rules 1. Remember you are using this equipment in the vicinity of high (lethal) voltage. Read and understand the instructions and the standard working practices within your industry before proceeding. SAFETY IS NO ACCI DENT. 2. Ensure that all parts of the equipment required are dry, clean and properly secured together. 3. Check the equipment and establish that it is correct for the voltage system under test. 4. Make sure that the equipment is properly earthed. 5. Functionally test the operation of the equipment via the proving unit before and after each test. 6. During tests, keep your hands on the insulated handle section only. 7. To avoid the danger of surface tracking, never place the section of the tester or phasing rod below the red band in contact with the high voltage source. REMEMBER-SAFETY IS NO ACCIDENT 1

4 List of Equipment, PRODUCT 11kV Equipment 33kV Equipment Part Number W'ght. D'mens'ns Part Number W'ght D'mens'ns. [] F0256A & 2,000 Length F0257A & 2,000 Length DFH5008 1,025mm DFH5008 1,200mm Tester c/w earth lead. F0258A & 1,400 Length F0259A & 1,400 Length DFH5011 1,025mm DFH5011 1,200mm Phasing rod c/w phasing lead Bent End Adaptor DFH Dev Length - As 11 kv - 675mm. 650 DFH mm -As 11kV Extension Rod I? 1,350 DFK mm - As 11 kv - Bowthorpe Rod Adaptor :d1- DFK Height 90mm - As 11 kv - Overhead Line Adaptor FOR01 A/2 1, x145 FOR02A/2 1, x145 x120mm x120mm Repeater Station - - Proving Unit c/w leads FOP01 B/1 DFH5011 1, x145 - As 11 kv - DFJ5000 x120mm 2

5 PRODUCT 11 kv Equipment 33kV Equipment Part Number I W'ght D'mens'ns -- ~ CMP5004 Carry Case 1 6,400 I I L 970mm W 268mm D 170mm - As 11kV - Carry Case 2 CMP5000 8,300 L 978mm W 392mm D 190mm - As 11 kv - NOTE: Carry Case supplied is dependent on specific items ordered. SPARES Earth Lead DFH ,605mm - As 11 kv - Proving/Phasing Lead DFH ,920mm - As 11 kv - Batteries 8 x HP11 (or equiv,) CEJOOOO --" As 11kV - n MIIIIIIIIII/l Hot Connector (Tester or Phasing Rod) 100 DDH mm - As 11 kv - [pmm Hot Connector (Extension Rod) DDH mm - As 11 kv - Cleaning Kit DDH As 11 kv - Aux. Battery Lead DFJ ,700mm - As 11 kv - 3

6 Assembling the Equipment LIVE LINE TESTER The Live Line Tester comprises five easily assembled sections. 0 I 1 (:PI I 5 I~ I 4 Fig, 1 1. Hot Connector. 2. Voltmeter Section. 3. Handle Section. 4. Earth Lead Assembly. 5. Phasing Lead Connection Point. To Make Ready For Use a) Screw the Handle Section (3) to the Voltmeter Section (2). b) Take Earth Lead Assembly (4) and screw onto Handle Section (3). Note: The Hot Connector (1) will normally be connected to the Voltmeter Section (2) and should be removed by unscrewing for the purposes of fitting other accessories. PHASING ROD ASSEMBLY The Phasing Rod Assembly comprises four sections. 0 I 1 ~ I~ I 4 Fig Hot Connector. 2. PhasingRod. 3. HandleSection. 4. PhasingLead. To assemble, follow instructions for Live Line Tester. 4

7 BENT END ADAPTOR For greater convenience in switchgear spout applications, bent end adaptors can be fitted to the Live Line Tester and/or Phasing Rod by:- Removing the Hot Connector (1) Fig. 1 & 2. The Voltmeter Section of the Live Line Tester can be rotated to achieve correct alignment with the bent end adaptor for ease of reading. EXTENSION RODS Extending the Length of the Live Line Tester/Phasing Rod methoas. The effective length of the tester and phasing rod can be extended by two different 1. Extending at the Hot End Remove Hot Connector (1) Fig 1 & 2 and fit extension rod. 2. Extending at the Earthed End Remove the handle section (3) Fig. 1 & 2 and replace with Bowthorpe Rod Adaptor. Standard Bowthorpe Rods can now be attached to achieve the effective length required. OVERHEAD LINE ADAPTOR Overhead Line Adaptor/s can be fitted to the Live Line Tester/Phasing Rod by fixing onto Hot Connector (1) Fig. 1 & 2. REPEATER STATION The Repeater Station is designed to permit test readings at ground level. This is achieved by removing the handle section (3) Fig. 1 & 2 from the Tester or Phasing Rod and fitting the Bowthorpe Adaptor. The signal is transmitted at low potential via the Bowthorpe Adaptor lead to the Repeater Station at ground level. PROVING UNIT The Proving Unit is powered by an integral Battery Pack comprising of 8 x 1.5V HP11 (or equivalent) which generates an output voltage of approximately3,,'5kv. The Proving Unit can be powered from a standard 12V vehicle battery by means of the Auxiliary Battery Lead provided. " Note When using the Bowthorpe Rod Adaptor and Repeater Station to test overhead lines it is recommended that an extension Rod be fitted. This reduces the possibility of parts of the tester assembly below the red mark comin gin contact with another phase voltage." 5

8 Using the Equipment ALWAYS TEST THE ASSEMBLED EQUIPMENT VIA THE PROVING UNIT BEFORE AND AFTER USE. 1. Proving the Live Line Tester Connect the earth lead to the earth terminal on the proving unit and insert live line tester into High Voltage Outlet as shown in Fig. 3. Observe good battery condition (low battery is indicated by flashing light on proving unit). Check meter is reading 3-5kV. Note: In the event of low battery indication, remove battery cover in lid of proving unit and replace batteries. If replacement batteries are not readily available, the proving unit can be powered from a standard 12V vehicle battery using the lead provided as shown in Fig. 4. To Check Full Scale Deflection on the Tester Connect the earth from the tester to proving unit and complete the circuit by means of proving/phasing lead provided as shown in Fig. 4. Depress Proving Unit operating button and vary the input current by turning the current level knob on the proving Unit. - nh.-_h _m LIVE tine TESTER ONTEST Fig. 3 " Note When using the Bowthorpe Rod Adaptor and Repeater Station to test overhead lines it is recommended that an extension Rod be fitted. This reduces the possibility of parts of the tester assembly below the red mark comin gin contact with another phase voltage." CALIBRATiNG INSTRUMENT FUll SCALE DEflECTiON Fig.4 6

9 2. Proving the Phasing Rod Connect the phasing rod to the Live Line Tester by means of the proving/phasing lead as shown in Fig. 6 and connect earth lead from Live Line Tester to the earth on the proving unit. Insert the Phasing Rod into the high voltage outlet on the proving unit and observe reading of 3-5kV on voltmeter. For low battery indication, follow instructions under 'Proving the Live Line Tester'. 3. ~ Proving the Extension Rod/Bent End Adaptor Fit the extension rod or bent end adaptor to the Live Line Tester and carry out test as described in 1 'Proving the Live Line Tester' and 'Full Scale Deflection'. 4. Checking the Phase Relationship Using Tester & Phasing Rod Use the Tester on its own to measure the potential of each system in turn. Tabulate the results as shown in Table 1. Connect the phasing rod to the Live Line Tester using Phasing Lead and the Live Line Tester to earth by means of earth lead and apply to each phase in turn as shown in Fig. 6. Check results as shown in Table 1, e.g. if lines are in phase, the reading will be 12.7kV (11 kv systems) or 38kV (33kV systems), Table 1 Line Voltage 11 kv System 13.8kV System 33kV System A B C A B 'C A1 & A In Phase 16 In Phase 38 In Phase A1 & B A1 & C B1 & A B1 & B In Phase 16 In Phase 38 In Phase B1 & C C1 & A C1 & B C1 & C In Phase 16 In Phase 38 In Phase 7

10 5. Checking the Phase Relationship on Overhead Lines using two Phasing Rods/Bowthorpe Poles and Repeater Station Remove the Handle Section from the Phasing Rods and fit Bowthorpe Adaptors. Connect the phasing/proving lead between P2 on the Repeater Station and Indicator Current Outlet on the Proving Unit and connect earth lead between the earth on the Repeater Station and earth on the Proving Unit. Check the full scale deflection of the repeater station as shown in Fig. 8by depressing the proving unit operating button and varying the current level. Remove phasing/proving lead from repeater station to provi~g unit and connect the phasing rods to the repeater station P1 & P2. Prove each in turn as shown in Fig. 5~ Extend to the required length with Bowthorpe Rods. Using one Phasing Rod, check the iine voltage (see Table 1). The second phasing rod should then be brought into use for the phasing tests to establish readings as per table 1. Overhead line hooks may be fitted for greater convenience when carrying out the tests.(see Fig. 7) N.B. Either or both phasing rods may be replaced by live line testers. - BOWTHO'" POLEATTACHMENT - PHASING'00 Cl PHASING LEAD \ -EARTH lead Fig. 5 Fig. 6 Fig.7 -"''''''00 -""10' Hv OUTLET EXTE'NAl BATTERY -BOWTH,"" POU, /.,,- IMPORT ANT! Fig, 8 THE FOREGOING TESTS ARE NOT COMPLETE UNTI L THE EQUIPMENT HAS BEEN PROVED TO ENSURE THAT THE RESULTS OBTAINED WERE VALID 8

11 After use - --General Conditions of Use and Storage After use the equipment should be wiped down with the cleaning kit supplied. It should be kept in its carry case and stored in a dry place. It should be handled and transported with reasonable care similar to common types of portable meters. Do not use out of doors in rain. Recommended Recalibration and Proof Testing The manufacturers recommend that the equipment should be re-checked every 12 months and a new certificate of accuracy and safety obtained. This service is available from the manufacturers at the address below. Edgcumbe Instruments, N.E.I. Electronics Ltd., Bothwell, Glasgow. G71 8EZ Scotland. Tel: (0698) Telex: Maintenance Live Line Tester The only active element in the Live Line Tester is the robust Taut Band Movement attached to a shock resistant mounting within an impact resisting housing. As a result, only extreme misuse can cause damage, in which case it should be returned to the factory for repair. The resin-impregnated glass fibre tubes are virtually maintenance free as each tube is a sealed unit and, provided the surface is kept free of water, then moisture problems should not exist. If the tube should become wet, it is sufficient to wipe all surfaces with a dry cloth and then give a finishing wipe with a polymer impregnated cloth to maintain the moisture repellant surface of the tube. Small surface abrasions and trapped dirt do increase the possibility of surface electrical tracking occurring during wet or damp conditions. The tubes should be kept clean by using a strong detergent solution or dirt solvent and then given a finishing wipe with the polymer cloth. Deeper scratches and/or dents which can be seen easily with the naked eye should be repaired at the factory. It is difficult to be specific with regard to damage but as a general rule, if the damage has caused surface roughness where dirt and moisture could be trapped, then a repair is necessary. Light lubrication of the threads is permissible but it is recommended that only lubricants of the type used for lubricating electrical contacts be applied. lubricant It should always be remebered that dirt can cause surface tracking and that too much in the wrong place could cause dirty surfaces. 9

12 Mechanical and Environmental Specifications Live Line Tester The following is a list of the specifications which control the mechanical features. PART Insulated Tubing and Handle MATERIAL & SPECIFICATION Resin Bonded Fibre Glass Indicator Case, Guard and Polycarbonate Window Bent End Adaptor Mild Steel Conductor & Polypropalene Insulated Coating Electrodes Aluminium ' Flexible Cable G.P.O. Specification LW/M(275B) Earthing Cable Black 7mm dia strands of 0.3mm dia. conductor 1.5mm dia. to BS Indicator Housing Continuous 3400 from stop to stop Rotational Adjustment Large Carrying Case Black p.v.c. Size 978 x 392 x 190 Small Carrying Case Material Black Rigid P.V.C. Size 970 x 268 x 190 Assembled Tester & Phasing Rods The 'Tester' satisfies the requirements of the International Electrotechnical Commission 'Draft' Specification for Voltage Detectors (Resistive type) for A.C. Voltages above 1kV. The tester comes under the category classification viz.... "not to be used in wet conditions". Assembled Tester, etc. Working Temperature Range -50 C to +500 C. Environmental To BS.2011 Part 2 Sections 2Ea, 2Eb,2F, 20g. Repeater Unit Case Material A.B.S. Size x 145 x 120 (over handle) Proving Unit Case Material A.B.S. Size x 145 x 120 (over handle) 10

13 Electrical Specifications Live Line Tester - There are two models of the Tester and Phasing Rod. One for use on 11 kv systems, the other for use on 33kV systems. -- Glass fibre tubing 42kV.for one minute (for all parts which can be radial breakdown voltage used with 33kV systems), Resistor Chain Value 75Ml1.:!: 5% for the 11kV Tester 225Ml1 + 5% for the 33kV Tester Movement Taut Band - Coi I resistance 360 ohms 100 micro amps F.S.D. Earth Cable Black 7mm dia strands of 0.3 mm dia. conductor 1.5mm dia. to BS Repeater Station Proving Unit Supplied in two ranges - 0 to 11 kv A.C. r.m.s. and 0 to 33kV A.C. r.m.s. Indicator Movement Taut Band - Coil resistance micro amps F.S.D. accuracy:!: 3.5% Earth Cable Black 7mm dia strands of 0.3mm dia. conductor 1.5mm dia. to BS Operating Temperature -50 C to +500 C. Power Supply Eight 1.5V Pen Cells HP11 or equivalent. High-voltage Output 5kV D.C. nominal max. current*, 100jUA. Low-voltage Source Variable current output 0 to 200 micro amps at 50Hz nominal Short circuit current :j>1ma Low Battery Voltage Indicator Flashing light when Battery Voltage drops below 9V. High-voltage Warning Lamp Is illuminated to indicate high-voltage test circuit is available. External 12V Input Terminals For "car" battery input. Can accept inputs of up to 15V D.C. any polarity without damage. Battery consumption < 200MA on high voltage generation with 12V supply. 11