Associated research 860 west laurel drive lake forest, il 60045 usa t. Jun 16, 2016 performing a high potential test at 18. Hipot setup and testing for hipotronics hd103 and hd106 acdc voltage testers overview to ensure your own personal safety and the safety of your coworkers, and to be sure that our displays are suitably tested to ensure customer safety, it is essential that you understand the proper setup and use of our hipot testers. Pdf format this file type includes high resolution graphics and schematics when applicable. Vlf hipot test is the preferred method of highpotential testing and should be used whenever a vlf test set is available. Dc testing can result in space charge effects building at these defect points. Insulation test also called high resistance test, megohm test. Hipot by definition via tm650 is the test of insulation of atypical potential layers, aka power and ground. This function is to change the time required for the outputted test voltage from the specified value falling to zero. It is designed to test electrical switchgear, cables, motors, generators, and protective equipment. Ammeter clear test a lowvoltage test using a 60 hz 125v ac power. Vlf hipot can do the job of a multiton series resonant or 60 hz output power supply. Hipot test also called hipot test, dielectric strength test, high voltage test, flash test. This test is often performed by applying an ac voltage but can also be done with a dc voltage.
These features are used with a dc hipot or ir test. Check during hipot test, it can increase the test reliability and efficiency significantly. When done properly, this test will expose short circuit conditions or weak components that could compromise electrical safety and create a higher than normal risk of human electrical shock. High voltage dc cable testing both dc hipot testing and vlf testing can meet the needs of laminated paper cables such as pilc and newly installed solid dielectric cables such as xlpe. The hybrid 2000 analyzer is a complete dielectric testing solution with ac hipot, dc hipot, insulation resistance and dc resistance testing capability. Basic hipot to advanced analyzers, weve got you covered hipot or dielectric withstand testers and analyzers manufactured by chroma are used for conducting electrical safety tests on electrical components and products to verify compliance with iec, ul, tuv, csa, en as well as complex medical safety testing to ensure human safety and product reliability. Can be used to safely connect the unit and load to ground before and after test shielded high voltage output cables included on pts37. Connecting outputs in series to achieve high voltage. The hipot test procedure described in figure 3 will be discussed first. Dec 01, 2011 what is hipot testing dielectric strength test. The guardian 19052 is capable of acdcir hipot testing and insulation resistance ir measurements. However with aging of the latter the insulation is no longer homogenous and defects accumulate. A dc hipot test should be used only when a vlf test set is not available.
These notes are all available for download in adobe pdf format. The series includes 10kvac12kvdc20kvdc units with maximum ac20madc10ma output which can perform acdc withstand voltage, insulation resistance, breakdown voltage tests with contact check during production line testing. Dielectric testing may be destructive in the event of a fault, depending on the test. Therefore, if a test of an installed motor in a plant fails above peak operating voltage, it does not mean that.
R field testing services division phenix technologies inc. The buttons are positioned a safe distance away from the high voltage. The new chroma 1905619057 hipot analyzer is specifically designed for testing and analyzing ultrahigh withstand voltage. Dc high voltage testing is not a substitute for ac in most cases and should be avoided. Methods of measurement of touch current and protective conductor current 2 iec 606011 3 rd edition. A cable will be subjected to multiple tests in its lifetime including a series of tests beginning at the factory and potentially continuing throughout the lifespan of the cable. Sentry plus series hipot testers instruction manual. Put the key in the switch and turn the key to the allow hipot position.
Multistep capability allows users to perform multiple tests in a sequence such as ac hipot followed by ir. The description of these tests will not apply to watercooled stator windings since the test procedure and analysis differ for watercooled units. Ac hipot test the ac hipot test is a highpotential test performed with ac voltage at 60 or 50 hz. Hipot tester made for hipot test, flash test, dielectric. Acdcir hipot tester complete dielectric testing solution the 19050 series electrical safety testers are advanced digital hipots with load and line regulation to ensure the measurement integrity. Integrated hipot for controllers closeup of hipot unit rear view of hipot with builtin bx1 hv mux front view of tester with lntegraed hi pot fine test. The hipotronics hd11s tester supplies the needed voltage and measures the current leakage. Dc testing is popular because the equipment is more compact and lighter in weight than comparable ac equipment. Having manual control of the hipot test should give the operator ample time to remove their hands from any.
Hipot test makes surety of no current will flow from one point to another point. Hipot electrical and medical device test equipment and. A dielectric withstand test or high potential or hipot test is an electrical test performed on a component or product to determine the effectiveness of its insulation. Pull the key and keep it with you while building the harness. Electrical safety testing reference guide iso 9001 certified. Instead, the analyzers display prompts ready to hipot after testing for continuity and resistance. Performed by stressing the insulation of the product far. Changing the time for voltage falling this instrument contains fall function.
Hipot testing of vacuum interrupters for ijvc power supplies ignitron conditioning for ijvc power supplies fullvoltage testing of new wc tr set capacitors before installation testing of 150kv marx generator electronics at full voltage prior to final assembly highvoltage test cage. Hipot test is short name of high potential high voltage teat and it also known as dielectric withstand test. Operator manual 3 transit protected meters prevent meter damage between test sites ground hook provided for increased operator safety. Hipot test is the most common type of electrical safety test. Hipot verification connection of s1401 load box to hipot tester figure 3 illustrates the connection of an s1401 passfail load box to a sentry 19073 acdcir hipot tester. Hilo programmable during test time lo can be set to off during hipot test hi can be set to off during ir test indication. The complete guide to electrical insulation testing. Cable testing revision 1 june 2, 2011 page 2 of 8 cable testing testing represents an integral part in the life of a cable. Dc hipot test passfail analysis a dc hipot test is done at a voltage higher than the peak operating voltage of the device under test dut, where peak voltage rms voltage x 1. Megohmeter testing revision 1 march 09, 2010 page 2 of 3 megohmeter testing.
Electrical safety testing reference guide power sources. However, the standards state that production hipot testing should not exceed 1,500vac, or its dcrectified equivalent of 2,121vdc, from input to output or input to ground. Features and specifications the vlf series of hipot test sets provide true sine wave ac output voltage for the test of high voltage cables and other capacitive loads. Ac, dc, or acdc hipotmegohmmeters testing applications models available cable g generator gis switchgear insulation materials motor portable recloser pm152 pm5 pm20 technologies phenix r transformer model pad56 model pm152 model pm5 model pm20 circuit breaker vacuum interrupter. Hipot testing and insulation resistance ir measurements. Large system programmable controllers high volume production testing features. Dc hipot test a test used to verify the insulation integrity of a device in order to protect the user from electrical shock. Standard features of the vlf series of ac hipots sine wave output, 0.
Hipot tester 190711907219073 users manual for the outputted test voltage from zero rising to the specified value. The hybrid 2000 combines these four test modes with eight hv scan channels for fast multipoint testing. The dc hipot withstand test is a passfail test that has been applied to all types of cable and accessories. The result obtained is a voltage value usually expressed in kilovolts kv. This high voltage test also called dielectric strength test, hipot test, hipot test, breakdown test or flash test is made to stress the device under test to an ac or dc high voltage and check that there is no breakdown nor perforation happening. High potential testing hipot testing can be conducted with a dc potential or ac potential and can be applied as a type 1, withstand test or a type 2, diagnostic test. When ac hipot tests are used for routine maintenance, the power transformer can be examined at rated voltage for 3 min instead of testing at 65% of factory test voltage. Continuity test checks surety of current flows easily from. When this test is indicated the industry provides 3 venues for accomplishing this. Very low frequency vlf testing hipot testing california.
Hipot or dielectric withstand testing instruments manufactured by chroma are used for conducting electrical safety tests on electrical components and products to verify compliance with iec, ul, tuv, csa, en as well as complex medical safety testing to ensure human safety and product reliability. No output cables are supplied for the pts300 or 600. Both dc hipot testing and vlf testing can meet the needs of laminated paper cables such as pilc and newly installed solid dielectric cables such as xlpe. Electrical safety testing help file for most popular standards v. The paper will further extrapolate to educate oems the full guidelines regarding what hipot testing is designed for and the difference for high potential individual net testing. Due to the nature of a dc withstand test, setting high and low leakage limits can prove difficult. I once designed a product for avaya, a 1u x 19 rack with an openframed oem power supply.
This requires the operator to manually press the function switch or hipot button to conduct a hipot test. Hi pot dielectric breakdown automated verification howto. Typical application of a megger test determines the insulation resistance of the test cable. Vlf hipot testing has a lot of the same advantages as dc hipot testing, the equipment used is conveniently small, relatively lightweight, and yields very accurate information. In definition, it is the application of an ac voltage higher than the rated voltage for a specified time for the purpose of determining the adequacy against breakdown of the insulating materials. Integrated hipot with builtin ax 1 high voltage mux. This type of system works for fast hipot tests but can be. By charting a current vs voltage curve, one can usually tell if the leakage current is mainly due to contaminated dirty windings, or due to a breakdown of the insulation as shown in the pictures below. The s1401 load box is compatible with the 19071, sentry 19073 and guardian series instruments.
The chroma guardian 19050 series of hipot testers is comprised of three models. The test is a means to qualify a devices ability to operate safely during rated electrical conditions. Safety, operation, and procedure instructions for the pts. Ac hv test value should not surpass 75% of the factory test value. Before moving on to the main hipot testing techniques, it is important to introduce the basic information on power cables, namely their types and typical structure.
A test voltage is applied and the resulting leakage current is measured, allowing the electrical isolation value to be calculated. Once the insulation is charged full test potential, the leakage current drops off to near zero ma. The current meter on the pts series also has a megohmmeter scale to allow for easy resistance measurements while the hipot is in operation. To allow a hipot test an operator must use each hand to hold down a button. The choice of the right method and the most appropriate instrument before moving on to the main hipot testing techniques, it is. Electrical safety testing reference guide touch area.
Dc hipot testing of solid dielectric cables can therefore make aged cables weaker without having the ability of detecting weak cables. The ac hv test value should not surpass 75% of the factory test value. Leakage testing video examples 1 iec 60990 2 nd edition. The reporting device that is additionally meant to create and render reports in the web will consistently be there to build the reports that you requirement for your framework. Hipot testing verifies the integrity of highvoltage ac primary wire insulation in an electrical system to ensure that it is safe to operate. This design is susceptible to input voltage fluctuation, with outside electrical influence affecting the test results. The test voltages to be used vary depending upon whether the device or circuit is low or high voltage, a primary or control circuit and whether tested at the factory or in the field. Ac hipot testing with stable output input voltage variation. The typical highpotential hipot test is an example of a type 1 field test.
In the last few years, hipot and continuity tests have resulted in the highest failure rates of any measurements we make. Designed to verify that the insulation of a product is adequate enough to withstand high voltage. Meggar testing excerpt from prysmians wire and cable. The 3kvac and 4kvac tests are a stress test for the main transformer only. Megohmeter testing can be applied as a destructive type 1 test or a diagnostic type 2 test depending on factors such as test duration and test voltage. Tradein your old hipot tester and receive credit towards your purchase of this instrument. Although, there remains one clear advantage to the vlf hipot testing method compared to the dc hipot testing method, the ieee standard does not caution that vlf hipot. Voltages, dwell, ramp and current cutoffs will be explored. However, it provides limited knowledge of the cable condition other than whether the cable system withstood the voltage for the duration of the test or not. To conduct these tests the main transformer is removed from the power supply and tested as a stand. A hipot testmeasures the ability of a product to withstand a high voltage applied between the circuits of a product and ground. As long as the buttons are held down the hipot test will happen.
This discussion will also focus on testing of stator windings and not on testing individual bars or coils. The megger insulation tester is a small, portable instrument that gives you a direct reading of insulation resistance in ohms or megohms. The pts series of dc hipot test sets provide continuously adjustable output voltages for the test and measurement of leakage current in high voltage insulation. Meanwhile, your heart palpitation unregulated and blood pressure falling down causes tragedy cant be redeemed. Understanding hipot certification testing electronic design.
However, if cables are touched or moved they should be deenergized. For good insulation, the resistance usually reads in the megohm range. Visual inspection visual inspection can be completed on energized installations. C function is used to check whether the connection is an open connection. Phenix is utilizing trailermounted variable frequency resonance test systems to perform onsite ac testing on newly installed or inservice underground transmission cable. The product supplied power for avayas voip phones in a distribution box with 10 watts for each device inline on rj45 ports which ran at t1 or 1. Dc hipot test at test start, there will be inrush current. The ac hipot test values for voltages up to 69 kv are presented in table 1. Hypot iii the standard for production line hipot testing 3705 3765 3770 3780 500 va meets 200 ma short circuit requirements find the right model that fits your testing needs hypot iii series includes productivityenhancing features and proven safety technology to reduce the safety compliance. If either switch is released, the hipot test aborts. The sentry 19070 hipot tester series provides 2 models to choose from. Ac hipot testing ac high potential tests are conducted at voltages above the normal system voltage for a short time. By varying testing frequency 20 to 300 hz testing power. Vlf series of portable ac hipots manufactured by high voltage, inc.
The megger insulation tester is essentially a highrange resistance meter ohmmeter with a builtin directcurrent generator. The dc hipot line offered by phenix technologies is ruggedly built and suitable for field or lab use. Hipot testing is an abbreviation for high potential testing a category of electrical tests used to verify the effectiveness of electrical insulation in transformers, motors, printed circuit boards, electrical sub. Image you are bathing in bath tube, suddenly drier in operating dropping into bath tube, the current flows from drier through your body to ground under this situation. The hipot test the dielectric voltagewithstand test is commonly known as the hipot test. If the output of the test equipment is less than 500va, the equipment shall. Power cable testing visual inspection of the cable installations, conduit, manholes, and so on, and electrical maintenance testing are the major maintenance routines for cable systems. The guardian 19053 combines both ac and dc hipot tests and ir.