UL 2272-2016 pdf download

UL 2272-2016 pdf download.ANSI/CAN/UL-2272:2016,Electrical Systems for Personal E-Mobility Devices.
29 Dielectric Voltage Withstand Test
29.1 This test is an evaluation of the electrical spacings and insulation at hazardous voltage circuits within the DUT.
29.2 Circuits at 60 Vdc or 30 Vrms or higher and electrically isolated from ac mains supplied circuits shall be subjected to a dielectric withstand voltage consisting of a dc potential of twice the rated voltage.
Exception No. 1: An essentially sinuso4al ac potential of frequency between 40 — 70 lz at twice rated voltage may be applied instead of the dc potential.
Exception No. 2: Semiconductors or similar electronic components not relied upon for protection from electric shock and liable to be damaged by application of the test voltage may be bypassed or disconnected.
29.3 For those circuits connected to an ac mains supply or not electrically isolated from ac mains circuits, the test voltage shall be an essentially ac potential of a frequency of 60 Hz at 1,000 V plus twice the rated voltage. If using a dc potenhial, the lest voltage shall be 1,414 times the ac test potential value of 1.000 V plus twice the rated voltaqe
Exception: Semiconductors or similar electronic components not relied upon for protection from electric shock and liable to be damaged by application of the test voltage may be bypassed or disconnected.
29.4 The test voltage Is to be applied between the hazardous voltage circuits of the DUT and non-current carrying conductive parts that may be accessible.
29.5 The test voltage Is also to be applied between the hazardous voltage charging circuit and the enclosure/accessible non-current carrying conductive parts of the DUT.
29.6 If the accessible parts of the OUT are covered with insulating matenal that may become live In the event of an insulation fault, then the test voltages are applied between each of the live parts and metal foil in contact with the accessible parts. The metal toil shall be wrapped tightly around and in intimate contact with the accessible part- The foil Is to be drawn tightly across any opening In the enclosure or other accessible parts to form a flat plane across such opening. See Figure 29.1.
30.5 The measured insulation res4stance between the positive terminals and accessible parts of the DUT shall be at least 50,000
31 Leakage Current Test
31.1 This test Is intended to evaluate a personal e-mobility device containing hazardous AC voltage circuits that can connect to mains AC during charging, for hazardous levels of leakage current.
31.2 The leakage current of a DUT wtien tested In accordance with 31.3 to 31.5 shall not be more than 0.5 milliampere.
31.3 All exposed conductive surfaces shall be tested for leakage currents, The leakage currents from these surfaces are to be measured to the grounded supply conductor individually as well as collectively if simultaneously accessible, and from one surface to another if simultaneously accessible. Surfaces are considered to be simultaneously accessible if they can be readily contacted by one or both hands of a person at the same time, If all accessible surfaces are bonded together and connected to the grounding conductor of the power supply cord, the leakage current may be measured between the grounding conductor and the grounded supply conductor.
31.4 II a conductive surface other than metal is used for the enclosure or a part of the enclosure, the leakage current is to be measured using a metal foil with an area of 10 by 20 centimeters (3.9 by 7.9 inches) in contact with the surface as shown in Figure 29.1. If the surface is less than 10 by 20 centimeters. the metal foil is to be the same size as the surface.
31.5 The circuit for the leakage current measurement is to be as illustrated in Figure 31.1. The meter that is actually used for a measurement need only indicate the same numerical value for a particular measurement as would the defined instrument. The meter used need not have all the attributes of the defined instrument. The measurement Instrument Is to comply with the following.