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What is UL62368

UL62368 is a North American standard for IT power supplies and is a safety standard.

Safety is mainly about the safety of the product, such as the temperature rise of the power supply, voltage resistance, insulation and so on these requirements, different products, different regions have different safety standards.

The general requirements of safety are to prevent the human body from being harmed by the following dangers, and the human body generally refers to users and service personnel in these two types of people

Step 1: Electric shock

2. Dangerous energy

3. Fire

4. Mechanical and thermal hazards

5. Radiation risk

6. Chemical hazards

7. Materials and parts

definition

1. The rated voltage, the voltage of power supply manufacturers calibration, AC120V, AC100-240 - v, AC120/240 v, DC24V, 120 v, 100-240 - v, 24 v

2. Rated current, equipment input current calibrated by the manufacturer,0.5A,1.0A,500mA,1000mA,

3. Rated frequency, power frequency calibrated by the manufacturer,50Hz, 60Hz

4. Rated frequency range, rated frequency range calibrated by the manufacturer, 50-60Hz,50/60Hz

(5) Mobile equipment with a mass of less than or equal to 18Kg and unfixed equipment, or equipped with rollers, casters or other devices to facilitate the operator to complete the need to move the equipment according to the intended application

6. Handheld device A mobile device, or a part of any type of device, to be held by the hand during normal use.

7. Portable equipment A mobile device intended to be carried regularly by the user

8. Standing devices Devices that cannot be moved

9. Built-in equipment Equipment intended to be installed in a prepared recess

10. The power cord that is not used in the intended use of the directly inserted device, the power plug and the housing constitute a whole, and the weight of the device is carried by the wall socket.

11. Electric shock protection category: Class I equipment: basic insulation, but also ground protection; Class II equipment: protection against electric shock not only relies on basic insulation, but also takes additional safety protection measures of equipment, Class III equipment: electric shock protection is to rely on SELV circuit to achieve, and does not produce dangerous voltage equipment.

Primary circuit: A circuit directly connected to the AC grid power supply.

Secondary circuit: not directly connected to the primary circuit, the second is powered by a transformer, converter or equivalent isolation device located in the device, or a circuit powered by a battery.

Ultra-low voltage circuit: under normal working conditions, the AC peak value of the voltage between any two conductors of the circuit, or between any conductor and the ground does not exceed 424, and the DC does not exceed 60V secondary circuit. Using basic insulation and hazardous voltage isolation, it does not meet the requirements of SELV, nor does it meet all the requirements of current limiting circuits.

The safety ultra-low voltage circuit is properly designed and protected by the secondary circuit, so that its voltage value does not exceed the safe value under normal working conditions and single fault conditions

The current limiting circuit is a circuit that is properly designed and protected so that the current that can flow from the circuit under normal operating conditions and single fault operating conditions is non-hazardous current.

Functional insulation Only the insulation required for the normal operation of the equipment (does not play an anti-shock role).

Basic insulation: Insulation that provides basic protection against electric shocks

Additional insulation: A separate insulation applied in addition to the basic insulation to prevent electric shock even if the basic insulation fails

Double insulation Insulation consisting of basic insulation plus additional insulation.

Reinforced insulation A single insulation structure which, under the conditions specified in this standard, provides a level of protection against electric shock equivalent to double insulation.

Operating voltage: The highest voltage on the insulation or components considered when the equipment is working normally

Electrical gap: The shortest space distance measured between two conductive parts, or between conductive parts and the interface of the device

Creepage distance: The shortest path measured along the insulating surface between two conductive parts or between conductive parts and the protective interface of the equipment

Functional grounding A point grounding of a device or system used for safety purposes

Protective ground conductor A wire in the building installation wiring or power cable (usually called the ground wire) used to connect the power supply protection ground terminal in the device to the building installation ground point.