High Voltage VLF-CM Series, Safety, Operation, And Procedure Instructions

Page 1: ...wer source The operator of this equipment must use good judgement and follow all safety precautions noted in this guide to ensure the protection of himself and others in close proximity to the test area Failure to follow the instructions could result in injury or death Proper grounding of the test set must be done prior to connecting this unit to a power source Mine VLF CM SERIES Please Refer to D...

Page 2: ...VLFOperatorManual HIGH VOLTAGE INC 31 County Route 7A Copake N Y 12516 Phone 518 329 3275 Fax 518 329 3271 http www hvinc com E Mail factory hvinc com ...

Page 3: ...e peak output voltage that is used during VLF testing If your test specification indicates a test voltage in RMS multiply by 1 414 to obtain the peak value for the test The IEEE400 2 chart indicating test voltages for different cable ratings shows both rms and peak All other AC hipoting using 50 60 Hz instruments is measured by the rms voltage not VLF testing so make sure this issue is addressed O...

Page 4: ...0 List of Components 11 S E C T I O N 2 Setting up the Equipment 12 13 Typical VLF Connection Scheme 14 VLF with Cable Reel Connection Scheme 15 Operating the Equipment 14 19 VLF Cable Testing Recommendations 20 21 Blank Page for Notes 22 S E C T I O N 3 Performing Special Operations 23 Voltmeter Re calibration 23 24 Miscellaneous 25 Weekly Maintenance 25 Yearly Maintenance 25 Return Material 26 W...

Page 5: ...ustomer s established procedures for the use of this type of equipment This Operator Manual is organized to provide information on the VLF Series in steps that familiarize the new operator with the entire scope of operation of this test set Section 1 Specifications and Controls Section 2 Setup and Operation Section 3 Performing Special Operations TheFunctions Features andSpecifications oftheVLFSer...

Page 6: ...e VLF Series of AC Hipots Sine wave output 0 1 0 05 and 0 02 Hz frequencies standard Continuously adjustable output voltage Continuous duty rating Fixed thermal circuit breaker overload Zero Start and External Interlock provision Single range voltmeter Single range Current Capacitance meter Two piece portable design Transit protected meter prevents damage between test sites Ground stick provided f...

Page 7: ...AWG clear jacketed cable for safety grounding of HV section Red and Black Measuring Leads for Capacitive Load Measurement WARNING DO NOT OPERATE THE VLF HIPOT SET IF THE HIGH VOLTAGE TANK IS 5 OR MORE FROM LEVEL IF THE UNIT IS OPERATED OUT OF LEVEL OVERHEATING AND INTERNAL ARCING MAY OCCUR DO NOT STORE OR TRANSPORT VLF HIGH VOLTAGE SECTION ON ITS SIDE ...

Page 8: ...re 5 C to 45 C 22 F to 113 F Output power is de rated linearly by 15 from 30 to 45 C ambient Maximum Relative Humidity 80 up to 31 C 88 F decreasing linearly to 50 at 40 C 104 F Mains supply fluctuation 10 of rated voltage Installation Category II Pollution Degree 2 WARNING DO NOT OPERATE THE VLF HIPOT SET IF THE HIGH VOLTAGE TANK IS 5 OR MORE FROM LEVEL IF THE UNIT IS OPERATED OUT OF LEVEL OVERHE...

Page 9: ...O P E R A T O R M A N U A L 5 Warning Please refer to documentation before operation Protective Earth Terminal Warning Hazardous Voltage ...

Page 10: ...z frequency Duty Continuous Continuous Test Capacitance Ins Res 10GΩ 1 1 µF 1 Hz 2 2µF 05 Hz 5 5 µf 02 Hz Minimum capacitance to achieve full output 01µF Kilovoltmeter 3 5 in 0 45 PEAK KILOVOLTS 2 Full scale Accuracy 3 5 in 0 65 PEAK KILOVOLTS 2 Full scale Accuracy Current uF Meter CM Models 3 5 in 0 100 PEAK MILLIAMPS 5 0 uF 5 FS Accuracy Control Case Size High Voltage Tank 22w x 11d x 15 25 high...

Page 11: ...O P E R A T O R M A N U A L 7 Table 1 VLF Series Specifications Figure 1 VLF 40 Series front panel controls Figure 2 VLF 60 Series front panel controls ...

Page 12: ...h to control the energizing of the high voltage output H V O V E R L O A D The HV OVERLOAD circuit breaker protects the variable transformer output control brush Its thermal characteristics allow for the short term overload of the variable transformer while still providing proper protection H I G H V O L T A G E O N O F F The HIGH VOLTAGE ON OFF pushbuttons activate de activate the high voltage po...

Page 13: ... mode 2 Set the time range using the up down push buttons default 30min 00 sec 3 Set the timer mode using the up down push buttons default down 4 Set the timer output mode using the up down push buttons default F 5 Set input signal width using the up down push buttons default 20mS 6 Set key protect level using the up down push buttons UP 1 7 Press and hold mode button for 3 seconds to exit program...

Page 14: ... S T S These posts are for connecting the cable to the capacitance measuring circuit The HOT post is for the cable center conductor the COM post is for the cable s grounded shield Be sure the cable is de energized before connecting this low voltage circuit or damage will result The resulting capacitance measurement on the cable will identify the best operating frequency for that particular cable r...

Page 15: ... ft interconnect cable with grounds BNC to BNC scope to panel interconnect coax cable 20ft 2AWG clear jacketed cable for safety grounding of the HV section Red and Black Measuring Leads for Capacitive Load Measurement WARNING DO NOT OPERATE THE VLF HIPOT SET IF THE HIGH VOLTAGE TANK IS 5 OR MORE FROM LEVEL IF THE UNIT IS OPERATED OUT OF LEVEL OVERHEATING AND INTERNAL ARCING MAY OCCUR DO NOT STORE ...

Page 16: ... interconnect cable to the high voltage tank Be sure the free hanging fan pump connector is also connected to the side connector 3 Secure a ground test lead to the panel The Ground post on the front panel should be used for that purpose A lead in the high voltage interconnect has been provided for the ground connection 4 Secure a ground test lead to HV TANK TheGroundstud the top of the tank should...

Page 17: ...grounding of the load test sample or cable The grounding requirements vary for different types of tests Please consult the local codes where applicable or reference the guidelines for grounding found under OPERATING THE EQUIPMENT WARNING DO NOT OPERATE THE VLF HIPOT SET IF THE HIGH VOLTAGE TANK IS 5 OR MORE FROM LEVEL IF THE UNIT IS OPERATED OUT OF LEVEL OVERHEATING AND INTERNAL ARCING MAY OCCUR D...

Page 18: ...tra steps that must be observed to ensure safe operation It should be noted that the VLF series test sets are not intended to be used on vacuum bottles or switchgear without cables connected The VLF requires a minimum of 01uF load capacitance to achieve full output If the capacitance of the load is too low the kilovolt meter will not read the actual peak output and damage to the unit and or load m...

Page 19: ...plished Take special note to ground the control section and the high voltage tank to a solid earth ground Caution Before making any cable connections ensure that the cable being tested has been properly identified de energized and grounded 2 Make sure that all insulators stress cones and pot heads are clean and free of moisture This will prevent flashover and minimize leakage 3 Isolate the far end...

Page 20: ...pecifications A generator is an acceptable power source If extensions cords are used for the input use 10 AWG cord for 25 ft and 8AWG for 50ft cords The output may not reach full voltage if the input extension is too small and causes a significant voltage drop under power 9 Turn on the main circuit breaker The MAIN POWER light will illuminate at both the power section and the control 10 Operate th...

Page 21: ... calibration for this connector is 1 volt for 10 kV of output C A U T I O N P O T E N T I A L LY L E T H A L V O LTA G E S M AY B E P R E S E N T STORED ENERGY LEVELS IN THE CABLE GREATLY INCREASE THE RISK OF FATAL INJURY IF CONTACT IS MADE WITH THE LOAD WHILE AT ANY VOLTAGE 13 Connect the output lead to the test sample be sure that there is enough clearance to grounded objects for the expected te...

Page 22: ...hrough the high voltage circuit Excessive loads can damage the VLF test set 17 After the test is complete rotate the OUTPUT control to zero allowing the load to return to zero and the unit to cycle for about 60 more seconds prior to depressing the HV OFF pushbutton Allowing the unit to cycle for some time allows for the complete discharge of the load and avoiding the normal self re charge that cap...

Page 23: ...STORE OR TRANSPORT VLF HIGH VOLTAGE SECTION ON IT S SIDE It should be noted that the VLF series test sets are not intended to be used on vacuum bottles or switchgear without cables connected The VLF requires a minimum of 01uF load capacitance to achieve full output If the capacitance of the load is too low the kilovolt meter will not read the actual peak output and damage to the unit and or load m...

Page 24: ...y vary depending on the operating voltage For instance a 15 kV cable may have a phase to phase operating voltage of 11 kV 12 5 kV 13 2 kV 13 8kV etc EuropeanStandard VDE0276 620 The oldest standard for VLF cable testing mandates a test voltage of 3Vo three times line to ground voltage for 60 minutes The 60 minute duration was is believed to be necessary to grow any and all defects no matter how mi...

Page 25: ... were grown to failure and be willing to live with a 2 3 in service failure rate over the next few years on cables that passed the VLF test Even at 3 the in service failure rate would be less by multiples than if the cable was never tested or tested with DC voltage In addition to the years of European and North American research an extensive review of VLF testing performed in Japan by Furukawa Ele...

Page 26: ... T O R M A N U A L 22 frequencies Lower test frequencies are sometimes necessary for testing highly capacitive loads very long cables Most HVI models are powerful enough to allow testing all three phases at once ...

Page 27: ...O P E R A T O R M A N U A L 23 THIS PAGE LEFT BLANK FOR APPLICATION NOTES ...

Page 28: ...The certification of meters on a yearly basis is recommended to ensure accurate test results Voltmeter Re calibration 1 Locate the unit in a position that will allow easy reading of the meters 2 Remove the panel screws and support the panel vertically to gain access to the calibration pot on the back of the voltmeter 3 Zero the meter movement using the zero adjustment below the scale window 4 Perf...

Page 29: ...dual customer and their particular needs The typical regular maintenance items are 1 Keep output cable insulation and HV tank well clean Use a clean cloth and mild solvent oil like WD40 to remove dirt and carbon marking from use 2 Watch for accumulation of dust or foreign matter in the cooling ports on the HV tank Clean with a damp cloth as necessary 3 Watch for loose clamps on the interconnect ca...

Page 30: ... if the return of the equipment is appropriate If deemed appropriate a Return Authorization Number will be issued At that time the Purchaser will be instructed how to mark and return the equipment The above procedure must be adhered to in order to ensure prompt service No equipment should be returned without the prior knowledge and authorization of High Voltage Inc REPLACEMENT PARTS ORDERING To or...

Page 31: ...t in cash before shipment of goods c If Purchaser so requests and makes arrangements prior to shipment which meet High Voltage s full satisfaction High Voltage in its discretion may accept irrevocable letters of credit in its favor issued by a United States bank which is satisfactory to High Voltage 7 INFRINGEMENT ETC On goods manufactured to Purchaser s specifications Purchaser shall and does ind...

Page 32: ...that this document is voidable or void shall be submitted to final and binding arbitration before and in accordance with the Commercial Rules of the American Arbitration Association then in effect and judgment upon the award may be entered in any court have jurisdiction thereof provided however that this clause shall not be construed to limit any rights which High Voltage may have to apply to any ...

Page 33: ...ve 0 1 0 02 Hz to 2 75 uF 30 kVac 0 4 uF VLF Withstand VLF TD VLF PD VLF TD Pair VLF VLF Diagnostic Cable Testing Tan Delta Partial Discharge HV Dividers 150 kV AC DC 300 kV AC DC VLF Thumper 0 9 18 36 kV 3200J 400mA Burny TDR Radar TD 34E 0 34 kV TDB 60 0 60 kVac Capacitor Discharge Systems Thumpers Three Full Joule Outputs VLF Thumper Combo PRODUCT SUMMARY 100 kVac 10 kVA PD 10 pc Concentric Neu...