Electrical Safety Terms 2
2.1.1 Insulation (performance)
All properties obtained after conductor insulation
2.1.2 Insulation (material)
All materials used to insulate the device.
2.1.3 Insulation structure
A combination of one or more insulating materials. According to the characteristics and size requirements of electrical equipment, it is designed with the conductor part as a whole, used to isolate the conductive part with potential difference.
Note: Several different insulation structures are allowed in one electrical device.
2.1.4 Basic insulation
Insulation on the live part that provides basic protection against electric shock
Separate insulation used in addition to basic insulation to prevent electric shock in the event of basic insulation damage.
At the same time with basic insulation and additional insulation insulation
Equivalent to a single insulation structure with double insulation protection.
Resistance between two conductors separated by an insulating material under specified conditions.
The highest electric field strength that the material can withstand without being damaged.
Medium strength experiment
A specified voltage is applied to the insulation to verify compliance with the short-term test of the circuit's rated insulation voltage as specified by the manufacturer.
In the absence of a fault, current flows into the ground or an external conductive part of the circuit.
Note: This current may include capacitive components due to intentional use of capacitors.
The dielectric absorbs power from the time-varying field and dissipates it as heat.
Loss angle (in the case of a sine wave)
(under sinusoidal condition)
Its tangent is the angle of the ratio of the absolute values â€‹â€‹of active power and reactive power.
The ratio of absolute power to active power of reactive power.
Parts that are protected by the device from some external influence and direct contact in any direction.
To prevent accidental contact with parts of the enclosure or baffles provided by parts that may be dangerous.
A component that protects against direct contact in any direction that is often approached.
Prevent unintentional direct contact, but do not prevent conscious direct contact with parts.
The shortest linear distance between two conductive parts.
Between the live part and ground is used to limit the gap where maximum overvoltage may occur.
The shortest distance between the two conductive parts along the surface of the insulating material.
a . Completely disconnect one device or circuit from another device or circuit.
(Using a separate method) provides a prescribed degree of protection to isolate any electrified circuit.
In order to prevent the human body from touching or approaching the charged body and from the risk of the vehicle or other object colliding with or approaching the charged body, a certain space distance is required to be maintained therebetween.
From any point on the surface where a person often stands or walks, to the extent to which he can reach the limit in any direction without the need for help.
2.3.1 (Continuous) Current Carrying Capacity
(continuous) current-carrying capacity (of a conductor)
Under the specified conditions, the conductor can be continuously carried without causing it to stabilize the maximum current exceeding the specified value
Logos made up of safe colors, geometric shapes, graphic symbols, and text to express specific security information.
Must be used in conjunction with the safety sign to sign the safety sign.
The color of the security information, such as prohibition, warnings, instructions, hints, etc.
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