Biddle OTS60SX_UG 电路图.pdf

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1、M OTS60SX Semi Automatic Oil Test Set User Guide Guide de lutilisateur Gebrauchsanleitung Gua del usuario RadioFans.CN 收音机爱 好者资料库 ContentsGuide de lutilisateur - p14Gebrauchsanleitung - s24Gua del usuario - p34 Safety Warnings 3 General Description4 Preparing the Oil Test Set5 Operation5 Oil Samplin

2、g5 Preparing the Oil Test Vessel5 Control Panel6 Breakdown Testing6 Withstand Testing6 Warning messages7 Testing to National Standards7 Sampling and Testing Oil for Dielectric strength 8 Oil Testing Specifications10 Test Set Specification10 Accessories12 Repair and Warranty13 2. RadioFans.CN 收音机爱 好者

3、资料库 3. SAFETY WARNINGS Safety warnings and precautions must be read and understood before the instrument is used. They must be observed during use. The oil test set must be properly earthed. The test chamber must be kept scrupulously clean. If the test chamber cover is cracked or damaged in any way

4、the test set must not be used, but sent for repair to an authorised agent. The chamber door hinges are fitted with earth contact springs. These must not be damaged or corroded. The correct type of oil test vessel must be used, and correctly positioned on the support horns before carrying out any tes

5、ting. Replacement fuses must be of the correct type and rating. NOTE THE TEST SET MUST ONLY BE USED BY SUITABLY TRAINED AND COMPETENT PERSONS. Symbols used on the Test Set Caution: Refer to accompanying notes. Risk of electric shock. Equipment complies with relevant EU Directives RadioFans.CN 收音机爱 好

6、者资料库 Mains Input Panel General Description 4. The OTS60SX is a lightweight, semi-automatic, oil dielectric strength test set. The instrument is suitable for protected field use and can be powered from a range of mains supplies. The maximum 60 kV output allows tests to be performed on oil from a wide

7、 variety of electrical installations including transformers, circuit breakers and other equipment. The operation of the test set is extremely simple and the results are displayed on a bright LED display. A selection of vessels enables the instrument to be configured for a variety of tests. The semi

8、automatic operation allows all types of testing to be performed. An automatic one minute timer operates when the high voltage is paused for Withstand (proof) testing. Oil samples can also be tested according to breakdown specification by using a suitable sequence of tests. The instrument is construc

9、ted in a strong, sheet steel case. Handles are provided for ease of transportation. A pouch is located on the side of the instrument to contain accessories such as the power cord, additional electrodes and the spacing gauge. An optional carrying case incorporates a shoulder strap. A number of vessel

10、s are available suitable for testing to a wide range of national specifications. Three types of electrode are available; spherical (IEC type), mushroom (VDE/ASTM D1816) and cylindrical (ASTM D877). The oil sample can be stirred by a motor driven impeller available in selected vessels. The vessel is

11、located in the top of the instrument and covered by a transparent polycarbonate door with a mesh screen so that the oil breakdown can be viewed. A safety interlock ensures that the high voltage is disconnected when the chamber door is opened. Voltage Selector Mains power input Fuseholders Preparing

12、the Oil Test Set 5 Ensure that the instrument is properly earthed. The test set must be connected to a socket (receptacle) with a protective earth (ground) conductor. Before connecting the instrument to the mains power supply, ensure the voltage selector located on the mains input panel is set to th

13、e required voltage. The correct fuse value should be fitted for the supply voltage (See Specification). The fuse holders are located next to the supply inlet. Power cord If the power cord plug is not suitable for your type of socket outlets, do not use an adaptor. You should use a suitable alternati

14、ve power cord, or if necessary change the plug by cutting the cord and fitting a suitable plug. The colour code of the cord is: Earth (Ground)Yellow / Green NeutralBlue Phase (Line)Brown If using a fused plug, a 3 Amp fuse to BS 1362 should be fitted. Note: A plug severed from the power cord should

15、be destroyed, as a plug with bare conductors is hazardous in a live socket outlet. Operation Oil Sampling The relevant test specification will give advice on the best methods to use when sampling oil. Contamination of the oil may lead to misleading results. Always run off a small amount of oil befor

16、e sampling and ensure that the flow of oil is steady. Preparing the Oil Test Vessel Optional vessels are available for testing to national specifications (See table and Accessories). Some specifications require stirring of the oil sample as well as different test electrode shapes. Once the correct v

17、essel has been chosen for the required test the electrode gap should be set. This is achieved by adjusting the threaded nut on the side of the vessel. Small adjustment of the gap can be made by hand tightening the nuts and rotating the spindle. A slot is provided on the end of the spindle for this p

18、urpose. A set of individual 0,5mm feeler gauges is provided for accurate measurement of the gap. Gauges can be combined to measure from 1mm to 4mm. (see page 12) Clean the vessel in accordance with the instructions given in the relevant test specification. Allowing space for the lid to be fitted, fi

19、ll the vessel with the oil sample. The amount of oil required will depend upon the type of lid used. Load the vessel in the test chamber, connecting the motor power cable, if fitted, and carefully shut the door so that the safety interlock switch operates. Control Panel The control panel contains th

20、e supply on/off switch, the high voltage display, voltage ramp rate selection and the three control keys. The operation of the instrument is very simple. When the instrument is turned on, the on/off switch is illuminated, and the software edition code will be flashed up on the display. Breakdown Tes

21、ting The suitable ramp rate for the test to be performed should be selected using the L key. The START key will then turn on the high voltage. The red H.V. indicator will light to show the output voltage is on. The voltage will then increase at the selected ramp rate and the corresponding value will

22、 be shown on the display. If oil breakdown occurs the instrument will detect this and immediately shut off the high voltage. The breakdown voltage value will be left on the display until the next test is started. If no breakdown occurs, the high voltage will rise to 60 kV. At this point the test vol

23、tage is cut off and this maximum value left on the display. A test can be stopped at any time by pressing the STOP I button. This will remove the high voltage from the oil sample and leave the display at 0,0 kV. Withstand Testing A Withstand (proof) test can be carried out by pressing the PAUSE key.

24、 This will maintain the high voltage at the current value for one minute. After this time the high voltage will continue to rise until one of the following:- 1) Oil breakdown occurs 2) The STOP Ikey is pressed 6. Mains on/off switch HV on indicator Ramp rate selection Main controls LED Display L Con

25、trol Panel 7 3) The output voltage reaches the maximum value of the test set. During withstand testing the ramp rate can be changed while the pause is in progress. This can allow the withstand test value to be accurately set by adjusting the ramp rate to the lowest value. Warning Messages Door Open

26、If the instrument overheats, the words and will be alternately displayed and the operation disabled. This will reset automatically, when cooled, after a few minutes. Testing to National Standards The OTS60SX can be used to test to any international standard. A table of the standards is given on page

27、 10. To perform these tests it is necessary to select the correct vessel so that the specified electrodes and suitable stirring are used. Most standards require repetitive breakdown tests to be carried out and the average taken. Note that sometimes the first breakdown result is omitted from the aver

28、age calculation. If continuous stirring is not required the stirrer motor supply can be disconnected when appropriate by opening the chamber door. 100 ml Oil Test Vessel The D877 Low Volume Test Vessel is an optional accessory for use with the Megger OTS60SX Oil Test Set. The test vessel must be kep

29、t scrupulously clean. Before each use, dismantle the test vessel, clean and dry, re-assemble, and set the electrode gap to 2,54 mm (0.100 inch). Dismantling the vessel 1.Loosen both white locking screws. 2.Hold each electrode in turn, and unscrew, and remove the sliding arm from each electrode. 3.Re

30、move both electrodes from the vessel. 4.Wash hands, and clean and dry the vessel as specified in ASTM D.877. Re-assembling the vessel 1.With clean, uncontaminated hands, place the cleaned electrodes in the vessel. 2.Position each electrode in turn with the fingers, and screw in a sliding arm through

31、 the vessel into the each electrode in turn. 3.Centre the electrodes, and set the gap, using the appropriate gauge. 4.Ensuring that the Viton O rings are not fouled, hand tighten both locking screws. Megger Limited also supply a range of automatic oil test sets. These have the parameters of a wide r

32、ange of specifications programmed into the instrument for unattended operation. Electrode Viton (Oil resistant) O Ring Locking screw Sliding arm Fill level The following notes should be read in conjunction with the relevant oil testing specifications. Causes of Bad Oil Transformers and switchgear oi

33、l may be rendered unsuitable for further use due to four main reasons:- 1.Low dielectric strength. 2.High acidity. 3.High sludge content. 4.Excessive free water content. Low dielectric strength may result from many causes, the most common of which is foreign particles or fibres and water in combinat

34、ion. Individually their effect may be relatively small, but together a contamination of only a few parts in a million can cause considerable lowering of the breakdown voltage of the oil. High acidity, sludge and free water should not be tolerated, but will not necessarily reduce the dielectric stren

35、gth below acceptable or specified levels. Appearance of the Sample Only an experienced person can judge the condition of an insulating oil from its appearance, but a general guide may be obtained from the following observations:- 1.A cloudy appearance may indicate that sludge has been formed. 2.A da

36、rk yellow colour could be a sign of overheating. 3.A blackish colour often results from an arc having taken place with either carbonisation of the oil or of the insulation within the equipment. 4.A green colour may be due to copper salts dissolving in the oil. Cleanliness of the Apparatus The necess

37、ity for scrupulous cleanliness in the apparatus and during the process of sampling, cannot be over emphasised. The measurement of the dielectric strength of the sample is as dependent on the cleanliness of the test cell and the sampling apparatus as the condition of the oil itself. After cleaning th

38、e apparatus, it should under no circumstances be wiped, dried or even handled with a dusty or fibrous cloth as loose dust or fibres are liable to cause contamination. Precautions Necessary During Sampling Since the oil taken from a drain cock will inevitably contain an excess of settled out solid im

39、purities, and will not necessarily be representative of the bulk of the oil, it should be run to waste until clear. Always run off a quantity of oil into a glass bottle or a test tube for an initial check on the appearance of the oil. Attention to this point may prevent contamination of a clean test

40、 vessel. If necessary, thoroughly clean and dry the sample point using a suitable solvent. Any cloth used should be lint free. Open the sample cock and drain to waste enough oil to ensure that the sample cock is fully flushed and the sample is representative of the bulk of oil to be tested. This qua

41、ntity will depend upon the size of the transformer or main container. About 2 litres is usually suitable. When sampling from a drum or supply container, the oil should flow at a steady rate into the test vessel and after being swilled around the sides it should be discarded. Without altering the rat

42、e of flow of the oil the quantity required for the test should then be S Sa ammp pl li in ng g a an nd d T Te es st ti in ng g O Oi il l f fo or r D Di ie el le ec ct tr ri ic c S St tr re en ng gt th h 8 9 run off while taking extreme care to prevent the ingress of atmospheric dust, cloth fibres or

43、 moisture. Do not use a syphon. In the absence of a useable sample point, use a thief. Shield the sample from direct light until ready to be tested. Turbulence and air bubbles should be avoided when pouring the oil. Relevant national specifications should be observed. Particular care to prevent cont

44、amination is necessary when a test is to be made on a bulk delivery tanker, and on all occasions when a high value of dielectric strength is anticipated. The procedure suggested above should be rigorously applied. 10 Oil Testing Specifications Continuous/None Continuous/None 2.54mm Specification 11

45、Output voltage0 - 60 kV rms Test Frequency61,8 Hz Transformer rating500 VA Output disconnectionWithin 1 ms of detection of breakdown Power supply115 V (99 - 132 V), 230 V (198 - 264 V) (switch selectable) 50/60 Hz, 80 VA Fuses250 mA (T) HRC to IEC127/5 for 220/240 V supply 1 A (T) HRC to IEC127/5 fo

46、r 110/120 V supply Mains power cord fused plug (when applicable): 3 Amp to BS1362 OperationSemi automatic with 0,5, 2 or 3 kV/s selectable rate of voltage rise Pause function with automatic 1 minute timer for Withstand testing Display0,0 - 60,0 kV LED digital display HV on LED Ramp rate LED Measurem

47、ent Accuracy2% 3 digits ControlsStart, Pause, Stop, Ramp Rate select and Power On/Off switch SafetyThe instrument meets the requirements of IEC1010-1 (1995) EMCIn accordance with IEC61326 including amendment No.1 Temperature RangeOperating:0 to 40C Storage:-40 to +70C Humidity RangeOperating:80% RH

48、at 40C Storage:93% RH at 40C, 95% RH at 25C Dimensions336 mm (13,2 in) (H) x 400 mm (5,7 in) (L) x 235 mm (9,3 in) (D) Weight17,5 kg (38,5 lb) CleaningWipe disconnected test set with a clean cloth dampened with soapy water or Isopropyl Alcohol (IPA) 12 Accessories Supplied with InstrumentPart Number

49、 User Guide6172-120 Spacing Gauge (0,5, 1,0, 1,5, 2,0, 2,5, 2,54 zusammengenommen jedoch knnen sie bereits bei einer Verunreinigung von wenigen Teilchen pro Millionen zu einer beachtlichen Verringerung der Durchschlagsspannung des ls fhren. Ein hoher Sure- oder Schlammgehalt des ls sollte ebensowenig toleriert werden wie nichtgebundenes Wasser; diese Merkmale verringern jedoch die Durchschlagsfestigkeit nicht zwangslufig unter einen akzeptablen oder vorgeschriebenen Stand. Aussehen der Probe Nur erfahrene Bediener knnen vom Aussehen eines Isolierls auf dessen Zu