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Conclusion AN3353 8/9 Doc ID 018527 Rev 1 6 Conclusion This document describes how STMicroelectronics protection and filtering devices are tested to guarantee their capability to withstand the IEC 61000- 4-2 levels (contact or air discharge). When these
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THE ISRAEL ELECTRIC CORPORATION LTD ENGINEERING DIVISION SPEC: STR-1386 SUBSTATION PLANNING SECTOR Appendix 1 Page 2 of 4 1. REQUIRED TESTS FOR
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2014/2/6· In response to the question “What’s the difference between standards IEC 60898-1 and IEC 60947-2?”, I’m tending to answer with another question: What do they have in common? They are both standards that specify requirements for low-voltage circuit breakers.Is
We know the dielectric strength is 8,400V/mm so for 2mm the maximum voltage before breakdown occurs is 2 x 8,400 = 16,800V. In this example then the test voltage of 11,180 V can be used since it is less than the breakdown voltage of the material (16,800V).
Table 2 – Test voltage levels (1 of 2).. 15 Table 3 – Test voltage levels used in special cases .. 16 Table 4 – Minimum clearances in air (1 of 2) .. 38 This preview is …
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Basic Principles The best distribution system is one that will, cost-effectively and safely, supply adequate electric service to both present and future probable loads—this section is intended to aid in selecting, designing and installing such a system. The function of
9.1.2 High Voltage direct current tests These tests are done on apparatus expected to operate under direct voltage conditions, and also where, due to the inconvenience of the use of high capacity transformers required for extra high tension alternating voltage tests
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13.2.1 Atmospheric correction using Method 1 (recommended method for new equipment) The disruptive discharge voltage is proportional to the atmospheric correction factor k K = k 1 k 2 With k 1 air density correction factor k 2 humidity correction factor 13.2.1 1
The amount of water in the tank is defined as 1 volt and the "narrowness" (resistance to flow) of the hose is defined as 1 ohm. Using Ohms Law, this gives us a flow (current) of 1 amp. Using this analogy, let''s now look at the tank with the narrow hose.
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• Over-Voltage – Any voltage that exceeds the MCOV. Often expressed in p.u. with reference to the peak phase-to-ground maximum voltage 1 p.u. = MCOV × 2 ÷ 3 • Critical flashover (CFO) voltage – A voltage with a given waveform that causes flashover on 50%
ESD Withstand Voltage (IEC 61000−4−2) (Note 1) (IN and OUT when bypassed with 1.0 F capacitor minimum) ESD IEC 15 Air, 8 contact kV Human Body Model (HBM) ESD Rating are (Notes 2 and 3) ESD HBM 4000 V Machine Model (MM) ESD Rating are
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withstand a specified voltage and not to determine the break-down value. 5.4.2 Test to Breakdown, Short-time Test The voltage shall be increased from zero to breakdown at a uniform rate. The rate of rise shall be 0.5 or 1.0 kilovolts per second. depending on the
5.2 Test (see 6.6) 5.2.1 Raise the test voltage from zero to one of the follow- ing specified test condition values (see 6.2) as uniformly as possible, at a rate of approximately 100 volts DC per second. If the test condition is not specified Condition A shall be the default.
Short answer: it takes about 30,000 volts per centimeter, or about 75,000 volts per inch, to jump a clear air gap. Once the gap is ionized, the sustaining voltage is less. That’s in normal air, at normal temperature, humidity and air pressure, wit