UL 101:2019 pdf download.Leakage Current for Utilization Equipment.
5.1.1 This lest provides a measurement of leakage current from utikzahon equipment.
5.2 Characteristics of measurement circuit and measurement instrument
5.2.1 Measurement circuit — The measurement circuits for leakage current shall be as shown in Ejytite and Figure 5.2.
5.2.2 Measurement instrument — The measurement instrument is defined in items 5.2.3 — 5,2.6. The instrument that is actually used for measurement need only indicate the same numerical value (see also j) for the particular measurement as would the defined instrument The instrument used need not have all the attnbutes of the defined instrument The measurement instrument is only to be used where the current limit is not greatec that 5 MIU for nominal 50 or 60 Hz sinusoidal currents, or not greater that 2 MIt.) for any higher frequencies. Above these values, an instrument designed to respond to the physiological effect of let-go is applicable.
5.2.3 Over the frequency range 20 Hz to 1 MHz with sinusoidal currents, the performance of the instrument shall be as specified in 52.4 —525.
5.2.4 The measured ratio Vi Ill with sinusoidal voltages is to be as close as feasible to the ratio Vi Ill calculated with the resistance and capacitance values of the measurement instrument shownSee Appendix.)
5.2.5 The measured ratio V311i with sinusoidal voltages is to be as close as feasible to the ratio V31l1 calculated with the resistance and capacitance values of the measurement instrument shown in Etgi . (See Appendix B.) V3 is to be measured by the meter M in the measunng instrument If meter M has been calibrated to indicate directty in MIU. the indication of the meter is to be divided by 2 to obtain rms volts.
52.6 The meter M in the measurement instrument shall indicate, in MILL 2.0 times the effective value (rms) of the voltage applied to it, (See .) The following shall be considered in the determination of the MIU:
a) The frequency response of the frequency sensitive network of the measurement instrument as defined here approximates the inverse of the experimentally determined 50 percentile threshold of perception curve for hand holding a small wire normalized to 0.5 milliampere at 60 Hz.
5.2 Characteristics of measurement circuit and measurement instrument
5.2.1 Measurement circuit — The measurement circuits for leakage current shall be as shown in Ejytite and Figure 5.2.
5.2.2 Measurement instrument — The measurement instrument is defined in items 5.2.3 — 5,2.6. The instrument that is actually used for measurement need only indicate the same numerical value (see also j) for the particular measurement as would the defined instrument The instrument used need not have all the attnbutes of the defined instrument The measurement instrument is only to be used where the current limit is not greatec that 5 MIU for nominal 50 or 60 Hz sinusoidal currents, or not greater that 2 MIt.) for any higher frequencies. Above these values, an instrument designed to respond to the physiological effect of let-go is applicable.
5.2.3 Over the frequency range 20 Hz to 1 MHz with sinusoidal currents, the performance of the instrument shall be as specified in 52.4 —525.
5.2.4 The measured ratio Vi Ill with sinusoidal voltages is to be as close as feasible to the ratio Vi Ill calculated with the resistance and capacitance values of the measurement instrument shownSee Appendix.)
5.2.5 The measured ratio V311i with sinusoidal voltages is to be as close as feasible to the ratio V31l1 calculated with the resistance and capacitance values of the measurement instrument shown in Etgi . (See Appendix B.) V3 is to be measured by the meter M in the measunng instrument If meter M has been calibrated to indicate directty in MIU. the indication of the meter is to be divided by 2 to obtain rms volts.
52.6 The meter M in the measurement instrument shall indicate, in MILL 2.0 times the effective value (rms) of the voltage applied to it, (See .) The following shall be considered in the determination of the MIU:
a) The frequency response of the frequency sensitive network of the measurement instrument as defined here approximates the inverse of the experimentally determined 50 percentile threshold of perception curve for hand holding a small wire normalized to 0.5 milliampere at 60 Hz.
