Selection and application of medical power supply/medical power supply--
Moso power professional agent imported medical power supply
Because the medical equipment is used by people, the requirements for the equipment are very high. The normal operation of medical equipment is related to the health and even life of patients and doctors, the reliability of the power supply plays a key role in the normal operation of the equipment. Therefore, medical power supply and industrial and scientific experimental power supply are simultaneously classified as ISM equipment in some international standards, however, in view of the strict safety requirements of medical equipment, the design of medical power supply has its special specifications, especially for life support equipment with more stringent requirements.
In general, there are the following requirements for AC/DC medical Power supply: first, the safety of medical power supply.
For safety, it is mainly reflected in: ① sufficient safety distance is required in design. Generally speaking, the distance between input and output reaches more than 8mm.
② Withstand voltage between input and output to withstand 4000VAC.
(3) the leakage current required by the input to the output is very small. Generally, the leakage current required for a single fault is less than 200uA. ④ Grounding continuity (This is required for class I equipment).
This is also very important for medical equipment. The large grounding resistance leads to a potential difference in the ground potential of equipment powered by different power supplies, which may be harmful to seriously ill patients. Therefore, the grounding continuity must also be strictly tested, IEC requires that the resistance of PE to any touchable metal of the shell is less than 0. 1Ohm. Second: reliability of medical power supply.
Because medical equipment is used by people, the reliability of medical equipment is required to be higher.
The normal operation of medical equipment is a matter of life and death for patients and doctors, while power supply is the heart of electronic equipment, and its reliability plays an important role in the reliability of equipment, this also means that the reliability of the power supply is required to be higher. Third: environmental protection requirements for medical power supply. To meet ROHS requirements.
Medical equipment is a ROHS exempt product, so power supply products also need to meet ROHS requirements.
Fourth: medical power supply should meet the requirements of electromagnetic radiation.
EMI conduction and radiation meet EN55011, the limit is the same as EN55022ITE equipment, but only MDD (Medical Device Directive)
EMI reports from approved testing organizations are valid.
Generally, it is required to have a 6dB margin when designing, so as to meet the requirements when mass production, and at the same time, it is easy to pass the medical system test. Fifth: medical power supply has anti-interference ability.
This is very important to meet the requirements of preventing electromagnetic radiation.
Qualified medical power supply shall comply with EN60601-1-
2. This standard must cooperate with many EMC-related technical requirements.
In particular, it should be pointed out that the medical power supply must meet IEC61000-4-2 ((Electrostatic protection capability, required to reach 3kV), IEC61000-4-3 (
RF radiation protection capability, required to reach 3 V/m), IEC61000-4-4 EFT (
Voltage transient bearing capacity, required to reach 1kV), IEC61000-4-5 (
The bearing capacity of mains inrush current is required to reach 1kV and 2kV), IEC61000-3-2 (Harmonic requirements of mains line)And IEC61000-3-3 (Power line flicker requirements). Sixth: What is the reputation of medical power suppliers. US food ** administration (FDA)
It is required that medical products must be qualified by GMP (That is, it has good operation specifications)
Therefore, a qualified power supply manufacturer needs to have good process specifications and quality control.
From the above, it can be seen that the selection of medical power supply should be cautious, but not blindly pursue the price. Ask yourself whether the system equipped with this power supply is safe and reliable.
When selecting and purchasing medical power supply, we need to consider the risks that may occur in all aspects, and we must have a good reputation and be able to provide supporting documents that meet the relevant standards, and manufacturers that comply with quality and reliability standards and requirements purchase there.
Moso power professional agent imports medical power supply, welcome new and old customers to call 0755-83562355-35 consultation. Thank you!