Y Volution Scooter | Y Fliker | Y Glider | Kids Scooter | Balance вЂ¦ Yvolution Y Fliker Lift | Swing Wiggle Carving вЂ¦ вЂ“ ДЄ: Yvolution Y Fliker Lift | Swing Wiggle Carving Scooter for Kids Age 7+ and Adults: Sports вЂ¦ Customers who bought this item also bought. Customer reviews: Yvolution Y Fliker Lift | Swing вЂ¦ вЂ“ ДЇind helpful customer reviews and review ratings for Yvolution Y Fliker Lift | Swing Wiggle Carving Scooter for Kids Age 7+ and Adults at. Unplugging kids into the wonder of the world on our award-winning Y Fliker Scooters, Velo Balance Bikes and three wheeled Kick Scooters. Yvolution: Y Fliker, Scooters & Balance Bikes |Up to 35% Off Our usual customer service opening hours are Monday вЂ“ Friday: 09:00 вЂ“ 17:00 GMT, excluding Irish public holidays. Contact Us | Yvolution Official Store | YvolutionД¬ustomer Service Hours. Frequently Asked Questions | Yvolution Official Store | YvolutionДў. In order to have half the Pst, the number of load changes must be reduced by a factor of 9.1. A halving of load changes reduces Pst by only about 20%.

The relationship between number of load changes per time (n/ Tp) and Pst is non-linear. halving the switched load results in half the Pst. The relationship between amplitude of load changes and Pst is linear, i.e. If the load is changed gradually (for example, by the help of power electronics) instead of step fashion, this also makes flicker less perceptible. A reduction in flicker can be attained through making less frequent load changes, or smaller load changes. Only the amplitude of the load change is relevant, not the absolute value. In the standard there are formulas which allow the estimation of the Pst values to be expected.ДЇlicker is generated by load changes. If this state is feasible and realistic this means Pst has to fulfill the limits for Plt (which are lower).ДЄ purely analytical calculation of Pst is almost impossible. If the EUT is operated in a (relatively) constant fashion during the whole test, Plt = Pst will result. The IEC-flicker standard states that the EUT (Equipment Under Test) has to be operated during the test in a way which is the worst case state with respect to flicker. In the standard IEC 6 the observation intervals and the limiting values for Pst and Plt are specified:

The perceptibility value calculation and scaling algorithm were chosen such that a P value of 1.0 corresponds to a level at which 50% of test subjects found the flicker to be both noticeable and irritating. Long term flicker Plt is calculated as the cubic mean of several Pst values over a standardized two-hour period. ДЄ flicker meter is composed of several function blocks which simulate a 230 V/60 W incandescent lamp (reference lamp) and the human perception system (eye-brain model).ДЇrom the resulting momentary value of flicker the short term flicker 'perceptibility' value Pst is calculated according to a statistical process over a standardized 10-minute observation interval. The requirements of a flicker measurement equipment are defined in the international electro-technical standard IEC 6. The likelihood of flicker increase as the size of the changing load becomes larger with respect to the prospective short-circuit current available at the point of common connection.

Flicker may be produced, for example, if a steel mill uses large electric motors or arc furnaces on a distribution network, or frequent starting of an elevator motor in an office building, or if a rural residence has a large water pump starting regularly on a long feeder system.

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