Common electrical equipment standards:
GB 19517-2009 "National Electrical Equipment Safety Technical Specification Standards",
GB 14048-2006 "Low-voltage switchgear and control equipment Part 1: General Provisions"
GB 14048.2-2001 "Low-voltage circuit breaker for low-voltage switchgear and control equipment".
GB 14048.3-2002 "Low-voltage switchgear and control equipment Part 3: Switches, disconnectors, disconnecting switches and fuse combinations of electrical appliances"
GB 14048.4-2003 "Low-voltage switchgear and control equipment electro-mechanical contactors and motor starters"
GB/T 18216.1-2000 Test, Measurement or Monitoring Equipment for Electrical Safety Protection Detection of Low Voltage Distribution Systems under 1000V AC and 1500V DC Part 1: General Requirements"
GB 1208-2006 "Current Transformer"
GB 7251.1-2005 "Low-voltage Switchgear and Controlgear Part 1: Type Tests and Partial Type Tests of Complete Equipment"
GB 7251.1-2005 "Low-Voltage Switchgear and Controlgear Part 1: Type Tests and Partial Type Tests of Complete sets of equipment"
GB 1207-2006 "Voltage Transformer"
JB/T 9661-1999 "Low-voltage withdrawable complete sets of switchgear"
GB 13539-2002 "Low-voltage fuses Part 1: Basic requirements"
GB 4208-93 "Shell protection grade IP code"
GB / T 2900.16-1996 "electric terminology power capacitors"
GB 191-2000 "Packaging, storage and transportation of graphic symbols"
GB/T 13384-1992 "General Technical Conditions for the Packaging of Electrical and Mechanical Products"
1, Electrical Equipment (Electrical Equipment) is in the Electric power system for generators, transformers, power lines, circuit breakers and other equipment.
2, the basic elements:
(1) electrical insulation. Keep the distribution lines and electrical equipment is well insulated, is to ensure personal safety and the normal operation of electrical equipment, the most basic elements. Whether the performance of electrical insulation is good, can be measured by measuring its insulation resistance, compressive strength, leakage current and dielectric loss and other parameters to measure.
(2) safety distance. Electrical safety distance, refers to the human body, objects and other close to the charged body without danger of safe and reliable distance. Such as between the charged body and the ground, between the charged body and the charged body, between the charged body and the human body, between the charged body and other facilities and equipment, should maintain a certain distance. Usually, when working near power distribution lines and transformers and power distribution units, the safety distance of lines, transformers and power distribution units, maintenance safety distance and operation safety distance should be considered.
(3) safety current-carrying capacity. Conductor safety current-carrying capacity, refers to the amount of current allowed to continue to pass through the interior of the conductor. Continuously through the conductor of the current if more than the safety of the current-carrying capacity, the conductor's heat will exceed the permissible value, resulting in insulation damage, and even cause leakage and fire. Therefore, according to the safety of the conductor load capacity to determine the conductor cross-section and selection of equipment is very important.
(4) signs. Obvious, accurate, uniform sign is to ensure the safety of electricity is an important factor. Signs generally have a color sign, signboard signs and model signs. Color marking indicates the different nature, different uses of the wire; signboard sign generally as a sign of dangerous places; model sign as a sign of the special structure of the equipment.
{Source: Baidu Encyclopedia: Electrical Equipment}