With the increasing demand for digital products, power supply safety is super important for device working. Many countries required safety standards for power supplies, which are against fire, electric shock and injury.
Regional Safety Mark
As follows, we’ll show the certificates of the power supply for some countries.
RCM(C-tick & SAA)
There’re many other standards in the market, like CQC for China, NF for French, CB for member countries of IECEE, it is a big challenge to state all of them in this note, we’re trying to understand some regulations which usually used.
The safty standards also identify the equipment into 3 classes: Class I, Class II and Class III .
Equipment designed with basic insulation and protective earth ground. With the 2 protections, the equipment are protected from electric shock.
In summary, the equipment are Class I appliances with the following design:
-Made of Metal
-Has a 3 pins cable
-Has a metal earth pin
This standard is usually applied to industrial equipment.
Equipment designed with double or reinforced insulation. Thus the ground is not needed.
In summary, the equipment are Class II appliances with the following design:
-The case is plastic
-There’s a double box symbol on the rating plate
This standard is usually applied to commercial equipment.
The equipments with a SELV(Satety Extra Low Voltage) supply circuit, no more than 42.4Vp-p/30V ac(r.m.s) or 60v dc, and does not generate the hazardous voltage.
In summary, it’s usually applied for medical devices like:
-Implantable pacemaker pulse generator
-Wearable automated external defibrillators
-High frequency ventilators
With our digital usage increasing, the power supply safety and reliability is also developing, there will be more and more standards accordingly. Prowin will follow the market demand and offer the right power solution.