Biddle CB100_UG 电路图.pdf

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1、 AVTM810130 Rev. A April 2002 Instruction Manual AVTM810130 for Capacitance And Dissipation Factor Bridge Catalog No. 810130 High Voltage Equipment Read the entire manual before operating. Aparato de Alto Voltaje Antes de operar este producto lea este manual enteramente. AVO International PO Box 900

2、7 Valley Forge, PA 19485-1007 U.S.A. Shipping Address: Valley Forge Corporate Center 2621 Van Buren Avenue Norristown, PA 19403 U.S.A RadioFans.CN 收音机爱 好者资料库 2 TABLE OF CONTENTS 1.0 GENERAL INFORMATION.6 1.1 GENERAL DESCRIPTION.6 1.2 CB100 FEATURES.6 1.3 SPECIFICATIONS.7 1.4 ACCESSORIES FURNISHED.8

3、1.5 ACCESSORIES AVAILABLE .8 1.6 CHANGES.9 1.7 WARRANTY.9 2.0 INSTALLATION.10 2.1 UNPACKING AND INSPECTION.10 2.2 PREPARATION FOR USE.10 2.3 LINE SUPPLY VOLTAGE.10 2.4 REPACKING AND SHIPMENT.10 3.0 OPERATING INSTRUCTIONS.11 3.1 PANEL CONTROLS AND OPERATING FUNCTIONS.11 3.1 PANEL CONTROLS AND OPERATI

4、NG FUNCTIONS (continued).12 3.2 SAFETY CONSIDERATIONS.13 3.3 GENERAL OPERATING INSTRUCTIONS FOR CB100.13 3.4 MEASUREMENT OF TWO WINDING TRANSFORMERS .17 A. Preparation for Test.17 B. Measurement of Insulation Power Factor.18 C. Recording of Identification and Test Data Using Test Sheet 01-100 and 02

5、-100 .20 D. Temperature Corrections.21 3.5 MEASUREMENT OF BULK OIL CIRCUIT BREAKER (O.C.B.).26 A. Preparation for Test.26 B. Measurement of Individual Bushings R.H. to 80% Storage: -40C to +65C. Temperature Coefficients: 0.02% of applicable accuracy spec. per C of both capacitance and dissipation fa

6、ctor. PHYSICAL: Instrument and accessories supplied with portable foam lined carrying case. Case has hinged opening from above with a lockable latch. Sizes: Model CB100 290W x 240H x 175D mm (11.5W x 9.5H x 7D in) Transport Case 430W x 375H x 330D mm (17W x 14.7H x 13D in) Weight: Instrument 5 kg (1

7、1 lbs) Shipping 11.8 kg (24 lbs) 1.4 ACCESSORIES FURNISHED Each instrument is supplied complete with: - two color coded leads-coaxial cable-10m long. - one color coded ground lead cable-10m long. - three wire line input cord. - one instruction-service manual. - one transport case. 1.5 ACCESSORIES AV

8、AILABLE 810132 Range Extension Adaptor 810133 Calibrator 810200 Oil Test Cell 810210 Oil Test Cell Heater 9 1.6 CHANGES Please note that this instrument is subject to continuous development and improvement. This instrument may therefore incorporate minor changes in detail from the information contai

9、ned herein. 1.7 WARRANTY Multi-Amp warrants this instrument sold by us or our authorized agents to be free from defects in material and workmanship for a period of 12 months from date of shipment. During the warranty period Multi-Amp will, at our option, repair or replace the instrument or part ther

10、eof which proves to be defective providing: 1. The instrument is returned properly packed and transportation prepaid with prior authorization from us or our appointed agent. 2. The instrument has not been altered, modified or repaired by unauthorized personnel and 3. That our examination discloses t

11、o our satisfaction that any improper operation or failure was not the result of improper use, negligence or accident, exceeding environmental limits, or connecting the instrument to incompatible equipment. This warranty is exclusive and is given and accepted in lieu of all other warranties, expresse

12、d or implied, and constitutes fulfillment of all our liabilities to the purchaser. Multi-Amp specifically disclaims the implied warranties of merchantability and fitness for a specific purpose. We assume no liability, in any event, for consequential damages, for anticipated or lost profits, for pers

13、onal injury due to use or accident, for incidental damages or loss of time or other losses incurred by the purchaser or any third party in connection with instruments covered by this warranty. 10 2.0 INSTALLATION 2.1 UNPACKING AND INSPECTION Prior to shipment this instrument was electrically tested

14、and mechanically inspected and found to meet specifications and be free of mechanical defects. After unpacking the instrument, visually inspect the instrument and accessories for damage. If evidence of damage is present, you must contact the carrier who transported the unit and file a claim in writi

15、ng. The shipping container and packing material should be retained for inspection by the carriers agent. Electrical operation as per section 3 should be checked as soon as possible after receipt. 2.2 PREPARATION FOR USE INSURE THAT THE APPARATUS TO BE TESTED IS CLEARED AND DE- ENERGIZED PRIOR TO TES

16、T. It is highly recommended that the user familiarize himself with the controls, functions and features detailed in section 3 prior to use. 2.3 LINE SUPPLY VOLTAGE This instrument is shipped from the factory for operation on either 120V, 60 Hz line or 220V, 50 Hz. 2.4 REPACKING AND SHIPMENT To insur

17、e proper shipment of this instrument it is recommended that the original reusable container and packing material be retained. If being returned for calibration or service please attach a card to the instrument specifying the owner, model and serial number and service required. 11 3.0 OPERATING INSTR

18、UCTIONS 3.1 PANEL CONTROLS AND OPERATING FUNCTIONS This section details and describes the operating features of the CB100 and is keyed in Figure 1 (next page). 1. Line Input Socket - Standard input for line cord provided. 2. Instrument On - Flipping this switch upwards activates the instrument, imme

19、diately sending test voltage to output BNC. 3. Power On Indicator - This red L.E.D. illuminates when instrument is energized. 4. Detector Phasing Switch - State of bridge balance of capacitance or dissipation factor selected. Null meter (5) is indicator for balance condition. 5. Null Meter - Indicat

20、or for balance condition of capacitance or dissipation factor. Detector phasing switch (4) determines which is being balanced. 6. Dissipation Factor Range Switch - The approximate magnitude of dissipation factor is first determined by this switch. 7. Dissipation Factor Dial - The precise value of di

21、ssipation factor is determined by this setting in conjunction with the D.F. range switch. 8. Capacitance Multiplier Switch - The approximate value of the capacitance being tested is determined with this switch. 9. Capacitance Switch - This switch determines the approximate value of capacitance being

22、 measured. 10. Capacitance Dial - The PRECISE VALUE of capacitance measured with this dial in conjunction with the capacitance multiplier (8) and capacitance switch (9). 11. UST-GST Switch - Determines the type of measurement being taken. UST stands for Ungrounded Specimen Test. GST stands for Groun

23、ded Specimen Test. 12. Test Voltage Outputs, CH, CL, G - Connected to specimen via test leads provided. CH is the bridge sensitive terminal. 12 3.1 PANEL CONTROLS AND OPERATING FUNCTIONS (continued) FIGURE 1 - PANEL CONTROLS AND OPERATING FUNCTIONS 13 3.2 SAFETY CONSIDERATIONS It should be noted, th

24、at, although the instrument outputs no dangerous voltage, it could be a source of electrical shock hazard. THIS INSTRUMENT MUST ALWAYS BE CONNECTED TO GROUND WITH THE SUPPLIED LEAD AND FRONT PANEL GROUND BINDING POST PRIOR TO AND DURING ALL MEASUREMENTS. THE APPARATUS BEING TESTED MUST BE CLEARED AN

25、D CORRECTLY GROUNDED TO AVOID ANY POSSIBILITY OF LETHAL FLOATING POTENTIAL. 3.3 GENERAL OPERATING INSTRUCTIONS FOR CB100 1. Connect the CB100 case ground terminal to station ground. 2. Select UST-GST switch position (Figure 1, 11) for required position. 3. Connect the CB100 to the specimen to be mea

26、sured as outlined in the specific instructions for apparatus under test. 4. Set detector phasing switch to C. 5. Set dissipation factor range to 0 - 10% 6. Set capacitance multiplier to 0.1 F. See Figures 2, 3, and 4. FIGURE 2 - UST-GST switch set to L-GND (CH-L 03- 100, see page 29. This measuremen

27、t is for one bushing and its associated De-Ion grid. 27 3.6 MEASUREMENT OF BULK OIL CIRCUIT BREAKER (continued) 8. Repeat steps 3-6 on each bushing in turn (Positions 2-6, Figure 9). FIGURE 9 C. Measurement of Bushings and Lift Rods (O.C.B. Closed) 1. The breaker should be in the CLOSED position. 2.

28、 Place the UST-GST switch in the CH-GND position (in red). 3. The CL coax lead (black) is not required for this test. 4. Connect the CH coax lead (red) to the high voltage bushing in position 1 or 2 (see Figure 9; both are shorted together). Keep the rest of the lead clear of the porcelain. 5. Make

29、sure CB100 ground is connected to system ground. 6. Personnel should keep several feet away from the high voltage bushing. This will minimize influence of the test readings. 7. Balance the CB100 as described in the general operating instructions, section 3.3 and record the measured values on the O.C

30、.B. test sheet; 03- 100, see page 29. This measurement is for two bushings and their associated lift rods. 8. Repeat steps 3-6 on each set of bushings and lift rods (3 sets total). D. Recording of Identification it increases as per the table VI below. TABLE VI - ACCURACY TABLE FOR RANGE EXTENSION AD

31、APTOR CB100 CAP SWITCH MULT. POSN. RANGE EXTENSION MULT. POSN. MULTIPLY BRIDGE READING BY ACCURACY CAPACITANCE % READING ACCURACY DISSIPATION FACTOR 0.05F 4 0.2 0.3 0.2% D.F. 0.1F 4 0.4 0.3 0.3% D.F. 0.05 25 1.25 0.4 0.4% D.F. 0.1 25 2.5 0.4 0.4% D.F. 0.05 100 5.0 0.5 0.5% D.F. 0.1 100 10.0 0.5 0.5%

32、 D.F. 0.05 400 20.0 0.6 0.6% D.F. 0.1 400 40.0 0.6 0.6% D.F. NOTE: D.F. range switch not to be used on 0-1%. When the range extension adaptor is used, the guard feature of the CB100 is lost and readings, therefore, have to be carried out in the more simple two-terminal configuration. 55 3.10 OPERATI

33、ON WITH RANGE EXTENSION (continued) B. Test Procedure 1. Ensure that specimen to be tested is completely DISCHARGED. Charged capacitors can be LETHAL. 2. Connect BNC on Range Extension to CH on bridge using BNC - BNC lead provided. 3. Connect binding post (black, located adjacent to BNC) on Range Ex

34、tension to G terminal on CB100. 4. Place UST-GST switch on L-GUARD (CH-G in red). 5. Connect C on Range Extension to specimen common. 6. Connect appropriate range of Range Extension to C high of specimen. Use sufficient wire to ensure wire resistance does not influence reading (Typically 12 or 14 ga

35、uge wire). 7. Balance the CB100 as described in General Instructions, Section 3.3. NOTE: DF range switch not to be used on 0-1%. Capacitance range switch to be used on 0.1uF or 0.05uF. For detailed connection, see Figure 24, below. FIGURE 24 56 3.11 OPERATION WITH CALIBRATOR, Cat. No. 810133 A. Gene

36、ral The Multi-Amp Calibrator (Cat. No. 810133) gives an operator a quick reference source for verifying the correct operation of the CB100. The calibrator ensures that each position on the UST-GST switch functions correctly and that its accuracy is within allowable tolerance. The calibrator fits qui

37、te conveniently in the CB100 transport case, taking up very little room. B. Operation 1. Connect red BNC from calibrator (marked HI) to CH on bridge. 2. Connect black BNC from calibrator (marked LO) to CL on bridge. 3. Connect center terminal from calibrator to ground terminal on bridge. 4. Compare

38、the values obtained, to values on calibration report for calibrator (see next page for sample sheet). 5. Set UST-GST switch as per each indicated position. See Figure 25, below, for correct connection. FIGURE 25 - UST-GST SWITCH TESTS ON ALL FIVE POSITIONS 57 NOTE: Connect the red lead to CxH; the b

39、lack lead to CxL; the ground must be connected to the bridge ground. NOTE: This calibrator is designed as a quick check and verificator of correct capacitance bridge operation and is not intended for absolute bridge calibration. For this service, please return the instrument to the manufacturer or a

40、ppointed service agent. 58 4.0 ANALYSIS OF RESULTS 4.1 POWER TRANSFORMERS - Two winding transformers, three winding transformers, regulators and reactors. The results from tests in Sections 3.4 and 3.6 provide valuable information regarding the general condition of the ground and interwinding insula

41、tion of transformers. They provide valuable information concerning the dryness of the transformer, and are helpful in detecting undesirable operating conditions and failure hazards resulting from: Moisture - Moisture can be absorbed by the paper insulation. - Free water in the liquid state which is

42、lying in pools on the insulation surface. - Both the above conditions may be detected by the dissipation factor test. However, free water in the form of ice will not be detected. Chemical Contamination Reaction between acids in the transformer oil and residue from materials used in treating the core iron may result in the production of sodium soaps. These high loss materials result in: