VC-35 User manual 110315
Contents
1. 110315 3 8 MIKROTREND 1 Overview Continuous adjustable High voltage source 1 37kVDC Designed to be used in Industrial and Power substations environment Multi purpose testing of Vacuum Circuit breakers cable insulation etc True ammeter reading guard screened test leads Single scale voltmeter Overload protected Line variations independent Built in battery Detachable high voltage cable with integrated cable storage space Rugged portable and reliable simple tu use Acoustic and visual signalisation when operated Vacuum circuit breakers do not last forever Air is leaking inside vacuum chamber dirt on the poles and on the exterior surface of the interrupter can reduce insulation the mechanics of the breaker can become misaligned and the distance between the poles is no longer adequate Any of this will change flashover point of Vacuum Circuit Breaker VC 35 is portable High voltage DC source for generation of negative voltages from 0 37kVDC It is designed for shop an on site testing of Vacuum Circuit Breakers cable insulation etc High Voltage is generated by high voltage transformer and a full wave capacitive voltage multiplier with silicon rectifiers Accurate voltage measurements are made directly at the output and current measurements are taken in the return leg Test leads are compensated for leakage currents with cable guard screen for true ammeter reading Safe discharging of both the test object and the h2. MIKROTREND Vacuum Checker VC 35 User manual MIKROTREND VACUUM CHECKER Vacuum Checker VC 35 User manual 110315 1 8 MIKROTREND Safety Recommendations ALL WORK SHOULD BE DONE BY QUALIFIED PERSONNEL FAMILIAR WITH THE CONSTRUCTION OPERATION AND HAZARDS INVOLVED WITH THE EQUIPMENT Mikrotrend products are not authorized for use in safetly critical applications where a failure of the product would reasonably be expected to cause severe personal injury or death Buyers represent that they have all necessary expertise in the safety and regulatory ramifications of their applications and acknowledge and agree that they are solely responsible for all legal regulatory and safetly related requirements concerning their products and any use of Mikrotrend products in such safetly critical applications notwithstanding any applications related information or support that may be provided by Mikrotrend Mikrotrend products are neither designed nor intended for use in military aerospace applications or environments Buyers acknowledge and agree that any such use of Mikrotrend products which Mikrotrend has not designed as military grade is solely at the Buyers risk and they are solely responsible for compliance with all legal and regulatory requirements in connection with such use Important User Information This guide has been developed as a quick reference tool to Mikrotrend d o o industrial automation controls and fac
3. ND 5 Important notice Mikrotrend d o o and its subsidiaries reserve the right to make corrections modifications enhancements improvements and other changes to its products and services at any time and to discontinue any product or service without notice Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete All products are sold subject to Mikrotrend s General terms and conditions of sale http www mikrotrend com PDF Selling Policy GT05c pdf supplied at the time of order acknowledgment Mikrotrend warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with Mikrotrend s standard warranty Testing and other quality control techniques are used to the extent Mikrotrend deems necessary to support this warranty Except where mandated by government requirements testing of all parameters of each product is not necessarily performed Mikrotrend assumes no liability for applications assistance or customer product design Customers are responsible for their products and applications using Mikrotrend components To minimize the risks associated with customer products and applications customers should provide adequate design and operating safeguards Mikrotrend does not warrant or represent that any license either express or implied is granted under any Mikrotrend patent right copyright mask work righ
4. NTIES AS TO ACTUAL PERFORMANCE WHETHER EXPRESS OR IMPLIED ARE EXPRESSLY DISCLAIMED X Ray Concerns IEEE Switchgear Committee Spring 2008 A few facts should be mentioned At all voltages X ray emission is zero when the interrupter is in the closed position At MV voltages up to 38kVrms X ray emission is zero or negligible Generally for MV circuit breakers significant X rays could only be generated at test voltages exceeding 38kV However once the system volts gets to much higher voltages such as 145kV then the possibility of X ray emission becomes significant although not generally a safety issue The real issue for designers is that it is possible for the interrupters to irradiate their local surroundings over a long period and this may have a detrimental effect on polymeric components or electronics mounted in the circuit breaker locally to the interrupters Vacuum Checker VC 35 User manual 110315 2 8 MIKROTREND Contents Safety RecommendationsS rnnrrnonnnnnnnnnnnnnnnnrnnnnnnnnnnnnnnnnnnnnnnnnnnonnnnnnnnnrnnnnnnnnnennnnnnnnrnnennnnnee 2 Important User Ihformall nzeu uneen sea 2 Performance Data vaere dei 2 GN GE 910 gt NE ENN 2 1 VET VEN a a nn 4 2 Connection and Use san 5 3 Technical specifications u 6 4 Troubleshooting and maintenance nununnnnnnnnnnnnnnnnnnnnnnnnn 6 5 Important notice ica cessactscansatecsncenstesatcanssswsacniadencetecontenesesactaxsbou 8 Vacuum Checker VC 35 User manual
5. igh voltage transformer occur whenever the high voltage is turned off VC 35 can be used powered from it s own battery power supply approx 15 minutes with full battery charge VC 35 is packaged in a handy carrying case and well suited for field applications VACUUM CHECKER VC 35 Block schematic www mikrotrend com Figure 1 VC 35 Measuring principle Vacuum Checker VC 35 User manual 110315 4 8 2 Connection and use MIKROTREND l Yellow i O MN S uA kV JOG r N x100 MIKROTREND 2 AZ 5 xo O VACUUM CHECKER O J I I oh VOLTAGE OUTPUT easwoC AMMETER RANGE EMERGENCY SHUT DOWN GE ADJUSTMENT v7 TT io i Vacuum Circuit Breaker Figure 2 VC 35 Connection diagram WARNING HANDLING HIGH VOLTAGES TO PREVENT ELECTRIC SHOCK OR INJURY DURING MEASUREMENT DO NOT TOUCH CABLE CLIPS WITH HANDS ALL WORK SHOULD BE DONE BY QUALIFIED PERSONNEL FAMILIAR WITH THE CONSTRUCTION OPERATION AND HAZARDS INVOLVED WITH THE EQUIPMENT The Vacuum Circuit Breaker must be disconnected from High Voltage bus bars and in OPEN position Prior to connecting mains VC 35 power switch must be switched OFF Connect the power cable 100 240 VAC Set the VOLTAGE ADJUSTMENT into the position MIN At first set ammeter range x100 Connect the H V cable to VC 35 Connect the yellow wire of H V cable to system ground Connect the red connector negative of H V cable to one p
6. imensions Weight High voltage cable lenght Maximum transient current through the external load is 10 mA Maximum discharge time for internal high voltage circuit is 0 5 sec 0 37 kVDC load gt 100 Mohm Ripple 5 max 0 5 mA max limited 0 50kV x1 0 5 UA x10 0 50 UA x100 0 500 uA Overload gt 0 5mA High Voltage ON High Voltage ON 0 450 C 32 F 4122 F 40 70 C 40 F 158 F less then 90 non condensing 100 240V 50 60Hz 2A max Sealed Gel Lead Acid Rechargable 12V 2Ah Constant voltage 14 hours full charge Alu case 210x335x460 mm 7 5Kg Instrument alone 9Kg with battery and connection cables 1 6m 4 Troubleshooting and maintenance 1 Maximum voltage can not be reached 1 Check battery If necessary recharge battery Replace battery every 5 8 years 2 Check High Voltage connector for dirt and or moisture Clean both sides of connector on the case and on the cable with soft tissue and isopropil alcohol Do not use other solvents 3 Check ambient air humidity When higher than 90 full output voltage may not be reachable Periodicaly replace desiccant Silica Gel on the bottom of instrument case or when necessary Vacuum Checker VC 35 User manual 110315 6 8 MIKROTREND eT Ce REE Ere erte Rechargable Battery 12V 2Ah Figure 3 Battery compartment Figure 4 High voltage cable assy Vacuum Checker VC 35 User manual 110315 7 8 MIKROTRE
7. mail mikrotrend2000 yahoo com www mikrotrend com Vacuum Checker VC 35 User manual 110315 8 8
8. ole of the Vacuum Circuit Breaker Vacuum Checker VC 35 User manual 110315 9 Connect the black connector positive of H V cable to other pole of the Vacuum Circuit Breaker Turn the POWER switch ON Yellow lamp HIGH VOLTAGE shall light up Buzzer shall beep Slowly increase voltage using VOLTAGE ADJUSTMENT knob until you reach test voltage specified for Vacuum Circuit Breaker Read the current on microammeter For guidance on allowed leakage currents refere to vacuum chamber manufacturer s specification and IEC 694 or ANSI C37 06 standards When the current through the Vacuum Circuit Breaker is greater then 0 5mA VC 35 will automatically power off OVERLOAD lamp shall light up VC 35 may be operated from built in battery supply approx 15minutes For full output voltage the battery must be fully charged Charging battery Leave the power cable of VC 35 connected for 14 hours or more The POWER switch during charging may be in OFF position 5 8 MIKROTREND 3 Technical specifications The specifications are valid at nominal input voltage ambient temperature between 0 50 C and relative humidity less then 90 Personal safety Output voltages Output current Voltmeter range Ammeter range Signalisation RED lamp YELLOW lamp Sound signal Working temperature range Storage temperature range Relative humidity Mains voltage Built in battery Battery charger D
9. t or other Mikrotrend intellectual property right relating to any combination machine or process in which Mikrotrend products or services are used Information published by Mikrotrend regarding third party products or services does not constitute a license from Mikrotrend to use such products or services or a warranty or endorsement thereof Use of such information may require a license from a third party under the patents or other intellectual property of the third party or a license from Mikrotrend under the patents or other intellectual property of Mikrotrend Reproduction of information in Mikrotrend data sheets is permissible only if reproduction is without alteration and is accompanied by all associated warranties conditions limitations and notices Reproduction of this information with alteration is an unfair and deceptive business practice Mikrotrend is not responsible or liable for such altered documentation Resale of Mikrotrend products or services with statements different from or beyond the parameters stated by Mikrotrend for that product or service voids all express and any implied warranties for the associated Mikrotrend product or service and is an unfair and deceptive business practice Mikrotrend is not responsible or liable for any such statements Mailing Address MIKROTREND d o o Technology park Zagreb D Golika 63 10000 ZAGREB CROATIA EUROPE Tel 385 1 3667 114 Fax 385 1 3667 115 GSM 385 98 504 838 e
10. tory assemblies Because of the variety of uses for the products described in this publication those responsible for the application and use of these products must satisfy themselves that all necessary steps have been taken to assure that each application and use meets all performance and safety requirements including any applicable laws regulations codes and standards Factory provided user manuals and technical documentation should not be solely relied on for those purposes Mikrotrend d o o reserves the right to change the features or characteristics of its products at any time Therefore the information contained in this publication is subject to change at any time without notice The illustrations charts diagrams and layout examples shown in technical documentation are intended solely as examples Since there are many variables and requirements associated with any particular installation Mikrotrend d o o can not assume responsibility or liability including intellectual property infringement liability for actual use based upon the examples shown in this publication Performance Data Performance data given in technical documentation is provided only as a guide for the user in determining suitability and do not constitute a performance warranty of any kind Such data may represent the results of accelerated testing at elevated stress levels and the user is responsible for correlating the data to actual application requirements ALL WARRA
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