13 Dec Withstanding Voltage Definition
The dielectric strength test is performed with a high-voltage source as well as voltage and current meters. A single device called a “pressure tester” or “high voltage tester” is often used to perform this test. It applies the necessary voltages to a device and monitors the leakage current. The current can trigger an error indicator. The tester has overload protection for the output. The test voltage may be either direct current, alternating current at the mains frequency, or another frequency, such as the resonance frequency (30 to 300 Hz determined by the load) or VLF (0.01 Hz to 0.1 Hz) if applicable. The maximum voltage is specified in the test standard for the respective product. The application rate can also be adjusted to control leakage currents resulting from the inherent capacitive effects of the device being tested. The duration of the test depends on the testing requirements of the asset owner, but can typically last up to 5 minutes. The applied voltage, application speed and test duration depend on the specification requirements of the device. Different test standards apply to consumer electronics, military electrical equipment, high-voltage cables, switchgear and other equipment.
 The dielectric strength test is used to verify that a particular electrical product or part has sufficient dielectric strength (i.e. insulation resistance) for the voltages to which it may be exposed. Three sites are tested: According to the Japanese industry standard JIS C 1010-1:2014, which specifies safety requirements for electrical equipment for measurement, control and laboratory applications, the test voltage used by a dielectric strength tester is based on the specifications of the main power supply as follows: (1) The supply voltage of the tested device (for example, AC 100 to 240 V, etc.) (2) The overvoltage category (measurement category) of the equipment under test (e.g. CAT II, CAT III, etc.) (3) The tables provided as part of the standardVoltage testers shall be able to apply the test voltages described in the standard and measure the bursting current. They are also subject to requirements such as the following, imposed by standards and laws:• The accuracy of the voltmeter must be JIS class 1.5 or higher.• The output power must be at least 500 VA (based on the capacity of the transformer used in the output voltage source).• The short-circuit current must be 200 mA (compared to the specifications of the transformer used in the voltage source of output).• The equipment must have step-by-step power up to the test voltage (refers to the method of increasing the output voltage). The resistance voltage is the maximum voltage at which the manufacturer guarantees a leakage current of less than 1 mA and no damage to the part when applied up to 5 s. For example, if the breakdown voltage is 1000 VAC, the test voltage is 750 VAC and the operating voltage is 250 VAC. DWV is tested by applying the calculated test voltage for 60 seconds. The coin will occur if there is no indication of an arc. These sample connections apply to a TV that is being tested for voltage. The L and N wires of the power supply are short-circuited and connected to the high-voltage terminal of the dielectric resistance tester (red). The screws on the TV inputs are connected to the tester`s low-voltage terminal (black).
These tests ensure that when a connector is used in ambient conditions at the rated operating voltage (attenuated by the test voltage), the product does not fail and there is no loss of power. The DWV (Dielectric Withstanding Voltage) test is intended to take into account instantaneous overpotentials caused by switching, overvoltages and other phenomena. This ensures proper operation at a test voltage equal to three times the nominal operating voltage of the tested system. Dielectric strength is explained in your data sheet: Home Knowledge Center Using Dielectric Strength Tests Definition: Field or factory testing in which a conductor or electrical equipment is subjected to a higher than normal AC or DC voltage to test its insulation system. The dielectric force is like a point of no return, after which the device is permanently damaged. The VQP is determined from the breakdown voltage (VDB) of a part (VED = 0.75 x VDC). The BDV is the constraint to which the part is bent on the metal interface. Think pin to pin or pin to material, and the working voltage is = 1/3 x DWV or 0.25 x BDV. The “nominal voltage” is 40% of the resistance voltage. They probably intend the rated voltage to be the maximum rated operating voltage for the part.