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Isigaba sesi-3 – Iqondwa kanjani incazelo “yebanga lefrikhwensi elinganiselwe”

Bygezhi-tech July 14, 2024September 27, 2025

ibanga lefrikhwensi elinganisiwe: ibanga lefrikhwensi elinikezwe umshini ngumkhiqizi, ovezwa imikhawulo yawo ephansi nangaphezulu.

Ngakho-ke, ngincoma ukuthi umake imvamisa elinganiselwe njengo-50/60Hz ngokuqondile.
Therefore, I recommend marking the rated frequency as 50/60Hz directly.

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Clause 3 – How to understand the definition of “small part”
Bygezhi-tech December 17, 2024September 27, 2025

small part: part, where each surface lies completely within a circle of 15 mm diameter, or a part where some of the surface lies outside a 15 mm diameter circle but in such a way that it is not possible to fit a circle of 8 mm diameter on any of the surfaces.NOTE A part…

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Isigaba sesi-3 – Iqondwa kanjani incazelo “yebanga le-creepage”
Bygezhi-tech September 1, 2024September 27, 2025

ibanga le-creepage: ibanga elifushane kakhulu endaweni yokufakwa phakathi kwezingxenye ezimbili ze-conductive noma phakathi kwengxenye ye-conductive nendawo efinyelelekayo. Izinkokhelo zingasakazwa ngendlela eqondisayo emoyeni, ngaleyo ndlela zenze umsinga. Lona incazelo yokukhishwa. Izindleko zingase futhi zisakaze ngokusebenzisa impahla yokuvikela uqobo, ngoba akukho mpahla evalwe ngokuphelele. Umehluko wamanje owakheke phakathi kwama-electrode amabili lapho ama-electrode amabili anamandla ahlukene esetshenziswa ezinhlangothini…

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If the PCB is sealed with solid sealant, how to determine the creepage distance and clearance?
Bygezhi-tech December 21, 2024September 27, 2025

functional insulation as well as other insulation exists on circuit boards. Typically, the surface environment of a circuit board is determined to be either Pollution degree 3 or pollution degree 2.If the circuit board is mounted in an electrical box and sealed with a solid sealant, the sealing will look as follows: What should be…

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Clause 3 – How to understand the definition of “protective device”
Bygezhi-tech January 27, 2025October 5, 2025

protective device: device, the operation of which prevents a hazardous situation under abnormal operation conditions The standard emphasizes “abnormal operation” here. Only devices that operate under “abnormal operation” conditions can be defined as protective devices. Therefore, there are many types of protective devices, including overheating protection devices, overcurrent protection devices, and overpressure protection devices. Overheating…

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Clause 3 – How to understand the definition of “safety extra-low voltage”
Bygezhi-tech September 5, 2024September 27, 2025

safety extra-low voltage: voltage not exceeding 42 V between conductors and between conductors and earth, the no-load voltage not exceeding 50 V When safety extra-low voltage is obtained from the supply mains, it is to be through a safety isolating transformer or a convertor with separate windings, the insulation of which complies with double insulation…

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Isigaba sesi-3 – Uyiqonda kanjani incazelo “yokufakwa kwamandla alinganiselwe”
Bygezhi-tech July 12, 2024October 5, 2025

rated power input:ukufakwa kwamandla okunikezwe umshini ngumkhiqiziInothi 1 kokufakwayo: Uma kungekho okokufaka kwamandla okunikezwayo entweni esetshenziswayo, okokufaka kwamandla okulinganiselwe okukalwa kwezinto zokushisisa nezinto ezisetshenziswayo ezihlanganisiwe kuwukufaka kwamandla okukalwa lapho into esetshenziswayo inikezwa ngevolthi elinganiselwe futhi isetshenziswa ngaphansi kokusebenza okujwayelekile. Emaqenjini okuthuthukisa anolwazi, okokufaka kwamandla okulinganiselwe kunqunywa esigabeni sokuqala somklamo womkhiqizo, futhi abathuthukisi bazoklama umkhiqizo ngokuya…

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